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自然对数是以常数e为底数的对数,记作lnN(N>0)。对数ln公式:ln ( mn ) =ln m +ln n ;ln ( m / n ) =ln m -ln n ;ln ( m ^ n ) =nln m ;ln 1 =0;ln e =1。
自然对数是以常数e为底数的对数,记作lnN(N>0)。在物理学,生物学等自然科学中有重要的意义,一般表示方法为lnx。数学中也常见以logx表示自然对数。常数e的含义是单位时间内,持续的翻倍增长所能达到的极限值。当自然对数lnN中真数为连续自变量时,称为对数函数,记作y=lnx(x为自变量,y为因变量)。
一般地,对数函数是以幂(真数)为自变量,指数为因变量,底数为常量的函数。对数函数是6类基本初等函数之一。其中对数的定义:如果ax=N(a>0,且a≠1),那么数x叫做以a为底N的对数,记作x=logaN,读作以a为底N的对数,其中a叫做对数的底数,N叫做真数。
一般地,函数y=logaX(a>0,且a≠1)叫做对数函数,也就是说以幂(真数)为自变量,指数为因变量,底数为常量的函数,叫对数函数。其中x是自变量,函数的定义域是(0,+∞),即x>0。它实际上就是指数函数的反函数,可表示为x=ay。因此指数函数里对于a的规定,同样适用于对数函数。
对数公式是什么?
运算法则公式如下:1、lnx+ lny=lnxy2、lnx-lny=ln(x/y)3、lnxu207f=nlnx4、ln(u207f√x)=lnx/n5、lne=1对数公式是数学中的一种常见公式,如果a^x=N(a>0,且a≠1),则x叫做以a为底N的对数,记做x=log(a)(N),其中a要写于log右下。其中a叫做对数的底,N叫做真数。通常将以10为底的对数叫做常用对数,以e为底的对数称为自然对数。对数运算,实际上也就是指数在运算。应用对数在数学内外有许多应用。这些事件中的一些与尺度不变性的概念有关。例如,鹦鹉螺的壳的每个室是下一个的大致副本,由常数因子缩放。这引起了对数螺旋。Benford关于领先数字分配的定律也可以通过尺度不变性来解释。对数也与自相似性相关。例如,对数算法出现在算法分析中,通过将算法分解为两个类似的较小问题并修补其解决方案来解决问题。以上内容参考:百度百科-对数2023-07-12 22:32:102
对数函数公式是什么?
对数函数公式是:loga(MN)=logaM+logaNloga(M/N)=logaM-logaNlogaNn=nlogaN(n,M,N∈R)如果a=em,则m为数a的自然对数,即lna=m,e=2.718281828…为自然对数的底,其为无限不循环小数。定义:若an=b(a>0,a≠1)则n=logab。log在高中数学里表示对数。一般地,函数y=logax(a>0,且a≠1)叫做对数函数,也就是说以幂(真数)为自变量,指数为因变量,底数为常量的函数,叫对数函数。通常我们将以10为底的对数叫常用对数(common logarithm),并把log10N记为lgN。另外,在科学计数中常使用以无理数e=2.71828......为底数的对数,以e为底的对数称为自然对数(natural logarithm),并且把logeN 记为In N。2023-07-12 22:33:191
对数函数的一些公式是什么
对数基本恒等式:a^log_a_N=N 积的对数等于对数的和log(MN)=logM+logN 省略底数a 商的对数等于对数的差log(M/N)=logM-logN 幂的对数等于对数的对数乘指数log(N^m)=mlogN 根式的对数等于被开方数的对数除以根指数log[N^(1/n)]=(1/n)logN对数的换底公式:log_b_N=log_a_N/log_a_b2023-07-12 22:33:361
对数公式,急求
(1)性质①loga(1)=0;②loga(a)=1;③负数与零无对数.④log(0)=1(2)运算法则 ①loga(MN)=logaM+logaN; ②loga(M/N)=logaM-logaN; ③对logaM中M的n次方有=nlogaM; 如果a=e^m,则m为数a的自然对数,即lna=m,e=2.718281828…为自然对数的底。3)换底公式 logaN=(logmN)/(logma)(4)推导公式 log(1/a)(1/b)=loga(b) loga(b)*logb(a)=12023-07-12 22:34:172
对数的常见公式
对数的性质及推导用^表示乘方,用log(a)(b)表示以a为底,b的对数*表示乘号,/表示除号定义式:若a^n=b(a>0且a≠1)则n=log(a)(b)基本性质:1.a^(log(a)(b))=b2.log(a)(MN)=log(a)(M)+log(a)(N);3.log(a)(M/N)=log(a)(M)-log(a)(N);4.log(a)(M^n)=nlog(a)(M)推导1.这个就不用推了吧,直接由定义式可得(把定义式中的[n=log(a)(b)]带入a^n=b)2.MN=M*N由基本性质1(换掉M和N)a^[log(a)(MN)] = a^[log(a)(M)] * a^[log(a)(N)]由指数的性质a^[log(a)(MN)] = a^{[log(a)(M)] + [log(a)(N)]}又因为指数函数是单调函数,所以log(a)(MN) = log(a)(M) + log(a)(N)3.与2类似处理MN=M/N由基本性质1(换掉M和N)a^[log(a)(M/N)] = a^[log(a)(M)] / a^[log(a)(N)]由指数的性质a^[log(a)(M/N)] = a^{[log(a)(M)] - [log(a)(N)]}又因为指数函数是单调函数,所以log(a)(M/N) = log(a)(M) - log(a)(N)4.与2类似处理M^n=M^n由基本性质1(换掉M)a^[log(a)(M^n)] = {a^[log(a)(M)]}^n由指数的性质a^[log(a)(M^n)] = a^{[log(a)(M)]*n}又因为指数函数是单调函数,所以log(a)(M^n)=nlog(a)(M)其他性质:性质一:换底公式log(a)(N)=log(b)(N) / log(b)(a)推导如下N = a^[log(a)(N)]a = b^[log(b)(a)]综合两式可得N = {b^[log(b)(a)]}^[log(a)(N)] = b^{[log(a)(N)]*[log(b)(a)]}又因为N=b^[log(b)(N)]所以b^[log(b)(N)] = b^{[log(a)(N)]*[log(b)(a)]}所以log(b)(N) = [log(a)(N)]*[log(b)(a)] {这步不明白或有疑问看上面的}所以log(a)(N)=log(b)(N) / log(b)(a)性质二:(不知道什么名字)log(a^n)(b^m)=m/n*[log(a)(b)]推导如下由换底公式[lnx是log(e)(x),e称作自然对数的底]log(a^n)(b^m)=ln(a^n) / ln(b^n)由基本性质4可得log(a^n)(b^m) = [n*ln(a)] / [m*ln(b)] = (m/n)*{[ln(a)] / [ln(b)]}再由换底公式log(a^n)(b^m)=m/n*[log(a)(b)]--------------------------------------------(性质及推导 完 )公式三:log(a)(b)=1/log(b)(a)证明如下:由换底公式 log(a)(b)=log(b)(b)/log(b)(a) ----取以b为底的对数,log(b)(b)=1=1/log(b)(a)还可变形得:log(a)(b)*log(b)(a)=1 很高兴为你解答,满意请采纳2023-07-12 22:34:241
log对数函数基本公式是什么?
log对数函数基本公式是y=logax(a>0 & a≠1)。对数公式是数学中的一种常见公式,如果a^x=N(a>0,且a≠1),则x叫做以a为底N的对数,记做x=log(a)(N),其中a要写于log右下。其中a叫做对数的底,N叫做真数。通常我们将以10为底的对数叫做常用对数,以e为底的对数称为自然对数。表达方式(1)常用对数:lg(b)=log10b(10为底数)。(2)自然对数:ln(b)=logeb(e为底数)。e为无限不循环小数,通常情况下只取e=2.71828。2023-07-12 22:34:331
对数运算法则对数运算公式
对数运算法则,是一种特殊的运算方法。指积、商、幂、方根的对数的运算法则。在数学中,对数是对求幂的逆运算,正如除法是乘法的倒数,反之亦然。这意味着一个数字的对数是必须产生另一个固定数字的指数。一般来说,乘幂允许将任何正实数提高到任何实际功率,总是产生正的结果,因此可以对于b不等于1的任何两个正实数b和x计算对数。由指数和对数的互相转化关系可得出:两个正数的积的对数,等于同一底数的这两个数的对数的和,两个正数商的对数,等于同一底数的被除数的对数减去除数对数的差,一个正数幂的对数,等于幂的底数的对数乘以幂的指数,若式中幂指数则有以下的正数的算术根的对数运算法则:一个正数的算术根的对数,等于被开方数的对数除以根指数。运算法则公式如下:1.lnx+lny=lnxy2.lnx-lny=ln3.lnx_=nlnx4.ln=lnx/n5.lne=16.ln1=0对数的概念:在数学中,对数是对求幂的逆运算,正如除法是乘法的倒数,反之亦然。这意味着一个数字的对数是必须产生另一个固定数字的指数。在简单的情况下,乘数中的对数计数因子。更一般来说,乘幂允许将任何正实数提高到任何实际功率,总是产生正的结果,因此可以对于b不等于1的。2023-07-12 22:35:001
对数函数的公式怎么记呢?
(loga(x))"=1/(xlna)特别地(lnx)"=1/x对数和对数函数是高中数学的重要内容,是高考的必考知识,需要同学们无条件地掌握。但是很多同学在高一时就没有掌握好对数知识,以至于成为整个高中阶段数学学习的绊脚石。大多同学没学好对数知识,主要原因是觉得对数的公式太多,杂乱无章。其中要注意的是:加(减)法则:[f(x)+g(x)]"=f(x)"+g(x)"乘法法则:[f(x)*g(x)]"=f(x)"*g(x)+g(x)"*f(x)除法法则:[f(x)/g(x)]"=[f(x)"*g(x)-g(x)"*f(x)]/g(x)^2log函数对数注意对数起初是为了解决天文学中的计算问题而产生的,因为实际应用性强,所以应用范围更广。特别是,在自然科学中,自然对数lnx应用更加普遍。在高考中,对数问题比比皆是,尤其是函数与导数压轴题中,经常出现自然对数函数f(x)=lnx及复合函数。因而,对数函数是复习函数的重中之重。2023-07-12 22:35:071
对数的基本公式是什么啊?
1、a^log(a)(b)=b 2、log(a)(a)=1 3、log(a)(MN)=log(a)(M)+log(a)(N); 4、log(a(M÷N) =log(a)(M)-log(a)(N) 5、log(a)(M^n)=nlog(a)(M) 6、log(a)[M^(1/n)]=log(a)(M)/n (注:上文^均为上标符号,例:a^n即为a的n次方) 7.logab*logba=12023-07-12 22:35:251
对数的运算法则及公式是什么?
01 log公式运算法则有:loga(MN)=logaM+logaN;loga(M/N)=logaM-logaN;logaNnx=nlogaM。如果a=em,则m为数a的自然对数,即lna=m,e=2.718281828u2026为自然对数的底,其为无限不循环小数。定义:若an=b(a>0,au22601)则n=logab。 自然对数的运算公式和法则:loga(MN)=logaM+logaN;loga(M/N)=logaM-logaN;对logaM中M的n次方有=nlogaM;如果a=e^m,则m为数a的自然对数,即lna=m,e=2.718281828u2026为自然对数的底。 e是“指数”(exponential)的首字母,也是欧拉名字的首字母。和圆周率u03c0及虚数单位i一样,e是最重要的数学常数之一。第一次把e看成常数的是雅各布u2022伯努利,他尝试计算lim(1+1/n) n 的值,1727年欧拉首次用小写字母“e”表示这常数,此后遂成标准。 自然对数的底e是一个令人不可思议的常数,一个由lim(1+1/n)^n定义出的常数,居然在数学和物理中频频出现,简直可以说是无处不在。这实在是让我们不得不敬畏这神奇的数学世界。2023-07-12 22:35:341
高中对数函数的的所有公式?
logaMN=logaM+logaN logaM/logaN=logaM-logaN logaM^n=nlogaM logbN=logaNb/logab logaB乘logbA=1 logaB*logbC*logcD=logaD loga(m)b(n)=n/mlogaB 1.换底公式 log(a)(N)=log(b)(N) / log(b)(a) 设N=logab(表示以a为底b的对数) 2.b=a^N lnb=Nlna N=lnb/lna2023-07-12 22:35:421
对数指数的互化公式是什么?
a^y=x→y=log(a)(x) [y=log以a为底x的对数]这就是将指数转换为对数。对数函数的一般形式为 y=logax,它实际上就是指数函数的反函数(图象关于直线y=x对称的两函数互为反函数),可表示为x=a^y,因此指数函数里对于a存在规定——a>0且a≠1,对于不同大小a会形成不同的函数图形:关于X轴对称,当a>1时,a越大,图像越靠近x轴、当0<a<1时,a越小,图像越靠近x轴。a叫做对数的底数,N叫做真数:1、特别地,我们称以10为底的对数叫做常用对数(common logarithm),并记为lgN。2、称以无理数e(e=2.71828…)为底的对数称为自然对数(natural logarithm),并记为lnN。3、零没有对数。4、在实数范围内,负数无对数。在虚数范围内,负数是有对数的。2023-07-12 22:35:511
对数所有的运算公式?
公式如下:1、a^log(a)(b)=b2、log(a)(a)=13、log(a)(MN)=log(a)(M)+log(a)(N);4、log(a)(M÷N)=log(a)(M)-log(a)(N);5、log(a)(M^n)=nlog(a)(M)6、log(a)[M^(1/n)]=log(a)(M)/n7、logab*logba=18、log(a^n)(b^m)=log(e^y)(e^x)=x/y x=ln(b^m),y=ln(a^n) 得:log(a^n)(b^m)=ln(b^m)÷ln(a^n)希望我的回答能够帮到你。2023-07-12 22:36:222
数学对数公式
1)性质:①loga(1)=0;②loga(a)=1;③负数与零无对数.2)运算法则:①loga(MN)=logaM+logaN;②loga(M/N)=logaM-logaN;③对logaM中M的n次方有=nlogaM;如果a=e^m,则m为数a的自然对数,即lna=m,e=2.718281828…为自然对数的底。3)换底公式logaN=(logmN)/(logma)换底公式4)推导公式log(1/a)(1/b)=loga(b)loga(b)*logb(a)=15)求导数(logax)"=1/xlna特殊的即a=e时有(lnx)"=1/x2023-07-12 22:37:423
指数函数和对数函数的运算公式
1对数的概念如果a(a>0,且a≠1)的b次幂等于N,即ab=N,那么数b叫做以a为底N的对数,记作:logaN=b,其中a叫做对数的底数,N叫做真数.由定义知:①负数和零没有对数;②a>0且a≠1,N>0;③loga1=0,logaa=1,alogaN=N,logaab=b.特别地,以10为底的对数叫常用对数,记作log10N,简记为lgN;以无理数e(e=2.71828…)为底的对数叫做自然对数,记作logeN,简记为lnN.2对数式与指数式的互化式子名称abN指数式ab=N(底数)(指数)(幂值)对数式logaN=b(底数)(对数)(真数)3对数的运算性质如果a>0,a≠1,M>0,N>0,那么(1)loga(MN)=logaM+logaN.(2)logaMN=logaM-logaN.(3)logaMn=nlogaM(n∈R).问:①公式中为什么要加条件a>0,a≠1,M>0,N>0?②logaan=?(n∈R)③对数式与指数式的比较.(学生填表)式子ab=NlogaN=b名称a—幂的底数b—N—a—对数的底数b—N—运算性质am·an=am+nam÷an=(am)n=(a>0且a≠1,n∈R)logaMN=logaM+logaNlogaMN=logaMn=(n∈R)(a>0,a≠1,M>0,N>0)难点疑点突破对数定义中,为什么要规定a>0,且a≠1?理由如下:①若a<0,则N的某些值不存在,例如log-28ue010②若a=0,则N≠0时b不存在;N=0时b不惟一,可以为任何正数ue010③若a=1时,则N≠1时b不存在;N=1时b也不惟一,可以为任何正数ue010为了避免上述各种情况,所以规定对数式的底是一个不等于1的正数ue010解题方法技巧1(1)将下列指数式写成对数式:①54=625;②2-6=164;③3x=27;④13m=5ue01073.(2)将下列对数式写成指数式:①log1216=-4;②log2128=7;③log327=x;④lg0.01=-2;⑤ln10=2.303;⑥lgπ=k.解析由对数定义:ab=Nue039logaN=b.解答(1)①log5625=4.②log2164=-6.③log327=x.④log135.73=m.解题方法指数式与对数式的互化,必须并且只需紧紧抓住对数的定义:ab=Nue039logaN=b.(2)①12-4=16.②27=128.③3x=27.④10-2=0.01.⑤e2.303=10.⑥10k=π.2根据下列条件分别求x的值:(1)log8x=-23;(2)log2(log5x)=0;(3)logx27=31+log32;(4)logx(2+3)=-1.解析(1)对数式化指数式,得:x=8-23=?(2)log5x=20=1.x=?(3)31+log32=3×3log32=?27=x?(4)2+3=x-1=1x.x=?解答(1)x=8-23=(23)-23=2-2=14.(2)log5x=20=1,x=51=5.(3)logx27=3×3log32=3×2=6,∴x6=27=33=(3)6,故x=3.(4)2+3=x-1=1x,∴x=12+3=2-3.解题技巧①转化的思想是一个重要的数学思想,对数式与指数式有着密切的关系,在解决有关问题时,经常进行着两种形式的相互转化.②熟练应用公式:loga1=0,logaa=1,alogaM=M,logaan=n.3已知logax=4,logay=5,求A=〔x·3x-1y2〕12的值.解析思路一,已知对数式的值,要求指数式的值,可将对数式转化为指数式,再利用指数式的运算求值;思路二,对指数式的两边取同底的对数,再利用对数式的运算求值ue010解答解法一∵logax=4,logay=5,∴x=a4,y=a5,∴A=x512y-13=(a4)512(a5)-13=a53·a-53=a0=1.解法二对所求指数式两边取以a为底的对数得logaA=loga(x512y-13)=512logax-13logay=512×4-13×5=0,∴A=1.解题技巧有时对数运算比指数运算来得方便,因此以指数形式出现的式子,可利用取对数的方法,把指数运算转化为对数运算.4设x,y均为正数,且x·y1+lgx=1(x≠110),求lg(xy)的取值范围.解析一个等式中含两个变量x、y,对每一个确定的正数x由等式都有惟一的正数y与之对应,故y是x的函数,从而lg(xy)也是x的函数.因此求lg(xy)的取值范围实际上是一个求函数值域的问题,怎样才能建立这种函数关系呢?能否对已知的等式两边也取对数?解答∵x>0,y>0,x·y1+lgx=1,两边取对数得:lgx+(1+lgx)lgy=0.即lgy=-lgx1+lgx(x≠110,lgx≠-1).令lgx=t,则lgy=-t1+t(t≠-1).∴lg(xy)=lgx+lgy=t-t1+t=t21+t.解题规律对一个等式两边取对数是解决含有指数式和对数式问题的常用的有效方法;而变量替换可把较复杂问题转化为较简单的问题.设S=t21+t,得关于t的方程t2-St-S=0有实数解.∴Δ=S2+4S≥0,解得S≤-4或S≥0,故lg(xy)的取值范围是(-∞,-4〕∪〔0,+∞).5求值:(1)lg25+lg2·lg50+(lg2)2;(2)2log32-log3329+log38-52log53;(3)设lga+lgb=2lg(a-2b),求log2a-log2b的值;(4)求7lg20·12lg0.7的值.解析(1)25=52,50=5×10.都化成lg2与lg5的关系式.(2)转化为log32的关系式.(3)所求log2a-log2b=log2ab由已知等式给出了a,b之间的关系,能否从中求出ab的值呢?(4)7lg20·12lg0.7是两个指数幂的乘积,且指数含常用对数,设x=7lg20·12lg0.7能否先求出lgx,再求x?解答(1)原式=lg52+lg2·lg(10×5)+(lg2)2=2lg5+lg2·(1+lg5)+(lg2)2=lg5·(2+lg2)+lg2+(lg2)2=lg102·(2+lg2)+lg2+(lg2)2=(1-lg2)(2+lg2)+lg2+(lg2)2=2-lg2-(lg2)2+lg2+(lg2)2=2.(2)原式=2log32-(log325-log332)+log323-5log59=2log32-5log32+2+3log32-9=-7.(3)由已知lgab=lg(a-2b)2(a-2b>0),∴ab=(a-2b)2,即a2-5ab+4b2=0.∴ab=1或ab=4,这里a>0,b>0.若ab=1,则a-2b0,a≠1,c>0,c≠1,N>0);(2)logab·logbc=logac;(3)logab=1logba(b>0,b≠1);(4)loganbm=mnlogab.解析(1)设logaN=b得ab=N,两边取以c为底的对数求出b就可能得证.(2)中logbc能否也换成以a为底的对数.(3)应用(1)将logab换成以b为底的对数.(4)应用(1)将loganbm换成以a为底的对数.解答(1)设logaN=b,则ab=N,两边取以c为底的对数得:b·logca=logcN,∴b=logcNlogca.∴logaN=logcNlogca.(2)由(1)logbc=logaclogab.所以logab·logbc=logab·logaclogab=logac.(3)由(1)logab=logbblogba=1logba.解题规律(1)中logaN=logcNlogca叫做对数换底公式,(2)(3)(4)是(1)的推论,它们在对数运算和含对数的等式证明中经常应用.对于对数的换底公式,既要善于正用,也要善于逆用.(4)由(1)loganbm=logabmlogaan=mlogabnlogaa=mnlogab.7已知log67=a,3b=4,求log127.解析依题意a,b是常数,求log127就是要用a,b表示log127,又3b=4即log34=b,能否将log127转化为以6为底的对数,进而转化为以3为底呢?解答已知log67=a,log34=b,∴log127=log67log612=a1+log62.又log62=log32log36=log321+log32,由log34=b,得2log32=b.∴log32=b2,∴log62=b21+b2=b2+b.∴log127=a1+b2+b=a(2+b)2+2b.解题技巧利用已知条件求对数的值,一般运用换底公式和对数运算法则,把对数用已知条件表示出来,这是常用的方法技巧ue0108已知x,y,z∈R+,且3x=4y=6z.(1)求满足2x=py的p值;(2)求与p最接近的整数值;(3)求证:12y=1z-1x.解析已知条件中给出了指数幂的连等式,能否引进中间量m,再用m分别表示x,y,z?又想,对于指数式能否用对数的方法去解答?解答(1)解法一3x=4yue03clog33x=log34yue03cx=ylog34ue03c2x=2ylog34=ylog316,∴p=log316.解法二设3x=4y=m,取对数得:x·lg3=lgm,ylg4=lgm,∴x=lgmlg3,y=lgmlg4,2x=2lgmlg3,py=plgmlg4.由2y=py,得2lgmlg3=plgmlg4,∴p=2lg4lg3=lg42lg3=log316.(2)∵2=log390,a2+b2=7ab.求证式中真数都只含a,b的一次式,想:能否将真数中的一次式也转化为二次,进而应用a2+b2=7ab?解答logma+b3=logm(a+b3)212=解题技巧①将a+b3向二次转化以利于应用a2+b2=7ab是技巧之一.②应用a2+b2=7ab将真数的和式转化为ab的乘积式,以便于应用对数运算性质是技巧之二.12logma+b32=12logma2+b2+2ab9.∵a2+b2=7ab,∴logma+b3=12logm7ab+2ab9=12logmab=12(logma+logmb),即logma+b3=12(logma+logmb).思维拓展发散1数学兴趣小组专门研究了科学记数法与常用对数间的关系.设真数N=a×10n.其中N>0,1≤alogk44>logk66>0,∴3x0).∴10t>1,ax2-2(a+1)x-1>1,∴ax2-2(a+1)x-2>0.①当a=0时,解集{x|x2023-07-12 22:37:513
对数函数的运算公式.
具体运算公式如上图所示。对数函数的定义:一般地,函数y=logax(a>0,且a≠1)叫做对数函数,也就是说以幂为自变量,指数为因变量,底数为常量的函数,叫对数函数。其中x是自变量,函数的定义域是(0,+∞)。它实际上就是指数函数的反函数,可表示为x=ay。对数函数的基本性质:(1)对数函数的定义域为大于0的实数集合。(2)对数函数的值域为全部实数集合。(3)函数总是通过(1,0)这点。(4)a大于1时,为单调递增函数,并且上凸;a小于1大于0时,函数为单调递减函数,并且下凹。(5)显然对数函数无界。2023-07-12 22:38:001
对数函数的公式是什么?
对数函数的公式是:(1)log(a)(MN)=log(a)(M)+log(a)(N)。(2)log(a)(M/N)=log(a)(M)-log(a)(N)。(3)log(a)(M^n)=nlog(a)(M) (n∈R)。(4)log(a^n)(M)=1/nlog(a)(M)(n∈R)。(5)换底公式:log(A)M=log(b)M/log(b)A (b>0且b≠1)。(6)log(a^n)M^m=(m/n)log(a)M。(7)对数恒等式:a^log(a)N=N; log(a)a^b=b。对数公式是数学中的一种常见公式,如果a^x=N(a>0,且a≠1),则x叫做以a为底N的对数,记做x=log(a)(N),其中a要写于log右下。其中a叫做对数的底,N叫做真数。通常我们将以10为底的对数叫做常用对数,以e为底的对数称为自然对数。2023-07-12 22:38:321
对数函数的公式是什么?
对数函数的公式是x=log(a)(N)。对数公式是数学中的一种常见公式,如果a^x=N(a>0,且a≠1),则x叫做以a为底N的对数,记做x=log(a)(N),其中a要写于log右下。其中a叫做对数的底,N叫做真数。通常我们将以10为底的对数叫做常用对数,以e为底的对数称为自然对数。实际应用:通常我们将以10为底的对数叫常用对数(common logarithm),并把log10N记为lgN。另外,在科学计数中常使用以无理数e=2.71828,为底数的对数,以e为底的对数称为自然对数(natural logarithm),并且把logeN记为In N。2023-07-12 22:38:581
对数的公式是怎么样的?
加法公式:同一底数的这两个数的对数的和等于两个正数的积的对数;减法公式:同一底数的被除数的对数减去除数对数的差等于两个正数商的对数。扩展资料:1、一个正数幂的对数,等于幂的底数的对数乘以幂的指数,即2、若式中幂指数则有以下的正数的算术根的对数运算法则:一个正数的算术根的对数,等于被开方数的对数除以根指数,即参考资料来源:百度百科-对数运算法则2023-07-12 22:39:122
对数函数计算公式是什么?
对数函数计算公式如下:1、a^(log(a)(b))=b。2、log(a)(a^b)=b。3、log(a)(MN)=log(a)(M)+log(a)(N)。4、log(a)(M÷N)=log(a)(M)-log(a)(N)。5、log(a)(M^n)=nlog(a)(M)。6、log(a^n)M=1/nlog(a)(M)。对数相关应用:对数在数学内外有许多应用。这些事件中的一些与尺度不变性的概念有关。例如,鹦鹉螺的壳的每个室是下一个的大致副本,由常数因子缩放。这引起了对数螺旋。Benford关于领先数字分配的定律也可以通过尺度不变性来解释。对数也与自相似性相关。例如,对数算法出现在算法分析中,通过将算法分解为两个类似的较小问题并修补其解决方案来解决问题。自相似几何形状的尺寸,即其部分类似于整体图像的形状也基于对数。对数刻度对于量化与其绝对差异相反的值的相对变化是有用的。此外,由于对数函数log(x)对于大的x而言增长非常缓慢,所以使用对数标度来压缩大规模科学数据。对数也出现在许多科学公式中,例如Tsiolkovsky火箭方程,Fenske方程或能斯特方程。2023-07-12 22:39:481
对数函数的一些公式是什么
对数函数没有特定的积分公式,一般按照分部积分来计算。例如:积分ln(x)dx原式=xlnx-∫xdlnx=xlnx-∫x*1/xdx=xlnx-∫dx=xlnx-x+c1.一般地,如果ax=n(a>0,且a≠1),那么数x叫做以a为底n的对数,记作x=logan,读作以a为底n的对数,其中a叫做对数的底数,n叫做真数。2.一般地,函数y=logax(a>0,且a≠1)叫做对数函数,也就是说以幂为自变量,指数为因变量,底数为常量的函数,叫对数函数。3.积分是微分的逆运算,即知道了函数的导函数,反求原函数。在应用上,积分作用不仅如此,它被大量应用于求和,通俗的说是求曲边三角形的面积,这巧妙的求解方法是积分特殊的性质决定的。2023-07-12 22:40:041
对数函数公式是什么?
在对数函数中,当a>0且a≠1时,M>0,N>0,那么:logu2090(MN)=logu2090M+logu2090N;logu2090(M/N)=logu2090M-logu2090N;logu2090(M^n)=nlogu2090M(n∈R) 。2023-07-12 22:40:345
对数公式推导
对数公式推导:log(1/a)(1/b)=log(a^-1)(b^-1)=-1logab/-1=loga(b),loga(b)×logb(a)=1,loge(x)=ln(x),lg(x)=log10(x)。对数公式是数学中的一种常见公式,如果a^x=N(a>0,且a≠1),则x叫做以a为底N的对数,记做x=log(a)(N),其中a要写于log右下。其中a叫做对数的底,N叫做真数。通常将以10为底的对数叫做常用对数,以e为底的对数称为自然对数。2023-07-12 22:41:231
log计算公式
log公式运算公式:loga(MN)=logaM+logaN;loga(M/N)=logaM-logaN; logaNnx=nlogaM。log梗概:对数(logarithm)是对求幂的逆运算,一个数字的对数是必须产生另一个固定数字(基数)的指数。对数的符号log出自拉丁文logarithm,最早由意大利数学家卡瓦列里(Cavalieri)所使用。如果a的x次方等于N(a>0,且a不等于1),那么数x叫做以a为底N的对数,记作x=logaN。其中,a叫做对数的底数,N叫做真数。对数在数学内外有许多应用。这些事件中的一些与尺度不变性的概念有关。例如,鹦鹉螺的壳的每个室是下一个的大致副本,由常数因子缩放。这引起了对数螺旋。Benford关于领先数字分配的定律也可以通过尺度不变性来解释。对数也与自相似性相关。例如,对数算法出现在算法分析中,通过将算法分解为两个类似的较小问题并修补其解决方案来解决问题。自相似几何形状的尺寸,即其部分类似于整体图像的形状也基于对数。对数刻度对于量化与其绝对差异相反的值的相对变化是有用的。此外,由于对数函数log(x)对于大的x而言增长非常缓慢,所以使用对数标度来压缩大规模科学数据。对数也出现在许多科学公式中,例如Tsiolkovsky火箭方程,Fenske方程或能斯特方程。2023-07-12 22:41:311
自然对数的公式以及推导
用^表示乘方,用log(a)(b)表示以a为底,b的对数*表示乘号,/表示除号定义式:若a^n=b(a>0且a≠1)则n=log(a)(b)基本性质:1.a^(log(a)(b))=b2.log(a)(MN)=log(a)(M)+log(a)(N);3.log(a)(M/N)=log(a)(M)-log(a)(N);4.log(a)(M^n)=nlog(a)(M)推导1.这个就不用推了吧,直接由定义式可得(把定义式中的[n=log(a)(b)]带入a^n=b)2.MN=M*N由基本性质1(换掉M和N)a^[log(a)(MN)]=a^[log(a)(M)]*a^[log(a)(N)]由指数的性质a^[log(a)(MN)]=a^{[log(a)(M)]+[log(a)(N)]}又因为指数函数是单调函数,所以log(a)(MN)=log(a)(M)+log(a)(N)3.与2类似处理MN=M/N由基本性质1(换掉M和N)a^[log(a)(M/N)]=a^[log(a)(M)]/a^[log(a)(N)]由指数的性质a^[log(a)(M/N)]=a^{[log(a)(M)]-[log(a)(N)]}又因为指数函数是单调函数,所以log(a)(M/N)=log(a)(M)-log(a)(N)4.与2类似处理M^n=M^n由基本性质1(换掉M)a^[log(a)(M^n)]={a^[log(a)(M)]}^n由指数的性质a^[log(a)(M^n)]=a^{[log(a)(M)]*n}又因为指数函数是单调函数,所以log(a)(M^n)=nlog(a)(M)2023-07-12 22:41:462
对数函数的十个公式是什么呢?
对数运算10个公式如下:1、lnx+lny=lnxy。2、lnx-lny=ln(x/y)。3、Inxn=nlnx。4、In(n√x)=lnx/n。5、lne=1。6、In1=0。7、Iog(A*B*C)=logA+logB+logC;logA"n=nlogA。8、logaY =logbY/logbA。9、log(a)(MN)=log(a)(M)+log(a)(N)。10、Iog(A)M=log(b)M/log(b)A(b>0Eb#1)。对数介绍在数学中,对数是对求幂的逆运算,正如除法是乘法的倒数,反之亦然。这意味着一个数字的对数是必须产生另一个固定数字(基数)的指数。在简单的情况下,乘数中的对数计数因子。更一般来说,乘幂允许将任何正实数提高到任何实际功率,总是产生正的结果,因此可以对于b不等于1的任何两个正实数b和x计算对数。2023-07-12 22:41:531
求高中数学必修一指数对数的计算公式
uff012023-07-12 22:42:212
高中数学的所有对数计算公式 急啊
定义: 若a^n=b(a>0且a≠1) 则n=log(a)(b) 基本性质: 1、a^(log(a)(b))=b 2、log(a)(MN)=log(a)(M)+log(a)(N); 3、log(a)(M÷N)=log(a)(M)-log(a)(N); 4、log(a)(M^n)=nlog(a)(M) 推导 1、因为n=log(a)(b),代入则a^n=b,即a^(log(a)(b))=b。 2、MN=M×N 由基本性质1(换掉M和N) a^[log(a)(MN)] = a^[log(a)(M)]×a^[log(a)(N)] 由指数的性质 a^[log(a)(MN)] = a^{[log(a)(M)] + [log(a)(N)]} 又因为指数函数是单调函数,所以 log(a)(MN) = log(a)(M) + log(a)(N) 3、与(2)类似处理 MN=M÷N 由基本性质1(换掉M和N) a^[log(a)(M÷N)] = a^[log(a)(M)]÷a^[log(a)(N)] 由指数的性质 a^[log(a)(M÷N)] = a^{[log(a)(M)] - [log(a)(N)]} 又因为指数函数是单调函数,所以 log(a)(M÷N) = log(a)(M) - log(a)(N) 4、与(2)类似处理 M^n=M^n 由基本性质1(换掉M) a^[log(a)(M^n)] = {a^[log(a)(M)]}^n 由指数的性质 a^[log(a)(M^n)] = a^{[log(a)(M)]*n} 又因为指数函数是单调函数,所以 log(a)(M^n)=nlog(a)(M) 基本性质4推广 log(a^n)(b^m)=m/n*[log(a)(b)] 推导如下: 由换底公式(换底公式见下面)[lnx是log(e)(x),e称作自然对数的底] log(a^n)(b^m)=ln(b^m)÷ln(a^n) 由基本性质4可得 log(a^n)(b^m) = [m×ln(b)]÷[n×ln(a)] = (m÷n)×{[ln(b)]÷[ln(a)]} 再由换底公式 log(a^n)(b^m)=m÷n×[log(a)(b)] --------------------------------------------(性质及推导 完) 编辑本段函数图象 1.对数函数的图象都过(1,0)点. 2.对于y=log(a)(n)函数, ①,当0<a<1时,图象上函数显示为(0,+∞)单减.随着a 的增大,图象逐渐以(1,0)点为轴顺时针转动,但不超过X=1. ②当a>1时,图象上显示函数为(0,+∞)单增,随着a的增大,图象逐渐以(1.0)点为轴逆时针转动,但不超过X=1. 3.与其他函数与反函数之间图象关系相同,对数函数和指数函数的图象关于直线y=x对称. 编辑本段其他性质 性质一:换底公式 log(a)(N)=log(b)(N)÷log(b)(a) 推导如下: N = a^[log(a)(N)] a = b^[log(b)(a)] 综合两式可得 N = {b^[log(b)(a)]}^[log(a)(N)] = b^{[log(a)(N)]*[log(b)(a)]} 又因为N=b^[log(b)(N)] 所以 b^[log(b)(N)] = b^{[log(a)(N)]*[log(b)(a)]} 所以 log(b)(N) = [log(a)(N)]*[log(b)(a)] {这步不明白或有疑问看上面的} 所以log(a)(N)=log(b)(N) / log(b)(a) 公式二:log(a)(b)=1/log(b)(a) 证明如下: 由换底公式 log(a)(b)=log(b)(b)/log(b)(a) ----取以b为底的对数 log(b)(b)=1 =1/log(b)(a) 还可变形得: log(a)(b)×log(b)(a)=1 在实用上,常采用以10为底的对数,并将对数记号简写为lgb,称为常用对数,它适用于求十进伯制整数或小数的对数。例如lg10=1,lg100=lg102=2,lg4000=lg(103×4)=3+lg4,可见只要对某一范围的数编制出对数表,便可利用来计算其他十进制数的对数的近似值。在数学理论上一般都用以无理数e=2.7182818……为底的对数,并将记号 loge。简写为ln,称为自然对数,因为自然对数函数的导数表达式特别简洁,所以显出了它比其他对数在理论上的优越性。历史上,数学工作者们编制了多种不同精确度的常用对数表和自然对数表。但随着电子技术的发展,这些数表已逐渐被现代的电子计算工具所取代。2023-07-12 22:43:111
对数运算的公式是什么?
加法公式:同一底数的这两个数的对数的和等于两个正数的积的对数;减法公式:同一底数的被除数的对数减去除数对数的差等于两个正数商的对数。扩展资料:1、一个正数幂的对数,等于幂的底数的对数乘以幂的指数,即2、若式中幂指数则有以下的正数的算术根的对数运算法则:一个正数的算术根的对数,等于被开方数的对数除以根指数,即参考资料来源:百度百科-对数运算法则2023-07-12 22:43:181
对数公式
log(a^n)(M)=log(a)(M)/log(a)(a^n)=log(a)(M)/n.也就是说x等于n分之一。其中第一个等号是用换底公式算的,换底公式是log(a)(b)=log(c)(b)/log(c)(a).2023-07-12 22:43:571
lg对数的计算公式
lg对数的计算公式:a^(log(a)(N))=a^t。对数公式是数学中的一种常见公式,如果a^x=N(a>0,且a≠1),则x叫做以a为底N的对数,记做x=log(a)(N),其中a要写于log右下。其中a叫做对数的底,N叫做真数。通常我们将以10为底的对数叫做常用对数,以e为底的对数称为自然对数。一个数,它的对数是已知数,就称此数为已知数的真数。真数亦称反对数,是相对于假数(即对数)而言的数。始见于《数理精蕴》下编卷三十八“对数比例”。设a是个不等于1的正数,即a>0,且a≠1。若ap=b,则称p为b的以a为底的对数;而称b为p的以a为底的真数。记作p=logab。例如,以2为底,则8的对数是3,3的真数是8。2023-07-12 22:44:371
对数函数换底公式,推导过程
举个例子 loga b=lgb/lga 证明令loga b=x则a^x=b两边取10的对数lga^x=lgbxlga=lgbx=lgb/lga因为loga b=x∴loga b=lgb/lga2023-07-12 22:45:013
对数的运算法则及公式是什么?
综述:lnx+ lny=lnxy。对数运算法则(rule of logarithmic operations)是对数函数一般运算法则,包括积、商、幂、方根等的运算。由指数和对数的互相转化关系可得出:两个正数的积的对数,等于同一底数的这两个数的对数的和。参考资料来源:百度百科-对数运算法则2023-07-12 22:45:571
对数运算10个公式?
1、lnx+lny=lnxy;2、lnx-lny=ln(x/y);3、Inxn=nlnx;4、In(n√x)=lnx/n;5、lne=1;6、In1=0;7、Iog(A*B*C)=logA+logB+logC;logA"n=nlogA;8、logaY =logbY/logbA;9、log(a)(MN)=log(a)(M)+log(a)(N);10、Iog(A)M=log(b)M/log(b)A(b>0Eb#1)。推导公式:1、log(1/a)(1/b)=log(a^-1)(b^-1)=-1logab/-1=loga(b);2、loga(b)*logb(a)=1;3、loge(x)=ln(x);4、lg(x)=log10(x)。2023-07-12 22:46:481
log对数函数基本公式是什么?
运算法则公式如下:1、lnx+ lny=lnxy2、lnx-lny=ln(x/y)3、lnxu207f=nlnx4、ln(u207f√dux)=lnx/n5、lne=16、ln1=0相关简介1、对数公式是数学中的一种常见公式,如果a^x=N(a>0,且a≠1),则x叫做以a为底N的对数,记做x=log(a)(N),其中a要写于log右下。其中a叫做对数的底,N叫做真数。通常我们将以10为底的对数叫做常用对数,以e为底的对数称为自然对数。2、对数运算,实际上也就是指数在运算。2023-07-12 22:47:111
《秋夜将晓出篱门迎凉有感》古诗的意思是什么?
也。秋夜将晓出篱门迎凉有感作者:陆游三万里河东入海,五千仞岳上摩天。遗民泪尽胡尘里,南望王师又一年。诗题意思:秋天的夜里,天快要亮的时候,走出篱笆门,忽然对面吹来一阵凉风,心中产生一股伤感,于是写下这首诗。2023-07-12 22:37:351
创建绿色校园需要我们共同的努力
As is known to us all, the surrounding has a great impact on our study and lives. In recent years, creating a green campus has been a common and popular goal for most universities or colleges. Creating a green campus has a great influence on students because most students spend their much time in campus. 众所周知,环境的对我们的学习和生活有很大的影响。近年来,创建绿色校园已经成为大多数的大学或学院是普遍存在的目标了。创建绿色校园对学生有很大的影响,因为大多数学生的大部分时间都是在校园。 However, in my opinion, to create green campus, what we need to do is not only to plant more trees and grasses to beautify our campusu2019s environment but also to create an energy-efficient and resource-cycled campus. Everyone on campus should be informed to form the habit of using resources properly and saving energy. In addition, the institutions should encourage students to use resources circularly. 然而,在我看来,创建绿色校园,我们需要做的是不仅要种植更多的树和草来美化我们的校园环境也创造了一个节能和资源循环的校园。校园里的每一个人都应该被要求形成节约能源资源的习惯。此外,学校应鼓励学生资源循环利用。 In a word, creating a green campus needs us to make joint efforts. And we can achieve it by doing pieces of small matters in daily life, such as turning off the light when leaving. 总之,创建绿色校园需要我们共同的努力。我们可以在日常生活中的小事做起,如离开的时候关灯。2023-07-12 22:37:351
创建一个绿色校园_1000字
As is known to us all, the surrounding has a great impact on our study and lives. In recent years, creating a green campus has been a mon and popular goal for most universities or colleges. Creating a green campus has a great influence on students because most students spend their much time in campus. However, in my opinion, to create green campus, what we need to do is not only to plant more trees and grasses to beautify our campus"s environment but also to create an energy-efficient and resource-cycled campus. Everyone on campus should be informed to form the habit of using resources properly and saving energy. In addition, the institutions should encourage students to use resources circularly. In a word, creating a green campus needs us to make joint efforts. And we can achieve it by doing pieces of *** all matters in daily life, such as turning off the light when leaving.2023-07-12 22:37:421
秋夜将晓出篱门迎凉有感诗意?
秋夜将晓出篱门迎凉有感二首 陆游迢迢天汉西南落,喔喔邻鸡一再鸣。壮志病来消欲尽,出门搔首怆平生。三万里河东入海,五千仞岳上摩天。遗民泪尽胡尘里,南望王师又一年。译文迢迢万里的银河朝西南方向下坠,邻家的公鸡喔喔叫个不停。疾病几乎把报国壮志消磨殆尽,出门四望不禁手搔白发抱憾平生。三万里长的黄河奔腾向东流入大海,五千仞高的华山耸入云霄触青天。中原人民在胡人压迫下眼泪已流尽,他们盼望王师北伐盼了一年又一年。2023-07-12 22:37:431
英语作文 书信《绿色校园》
As is known to us all, the surrounding has a great impact on our study and lives. In recent years, creating a green campus has been a common and popular goal for most universities or colleges. Creating a green campus has a great influence on students because most students spend their much time in campus.众所周知,环境的对我们的学习和生活有很大的影响。近年来,创建绿色校园已经成为大多数的大学或学院是普遍存在的目标了。创建绿色校园对学生有很大的影响,因为大多数学生的大部分时间都是在校园。However, in my opinion, to create green campus, what we need to do is not only to plant more trees and grasses to beautify our campus"s environment but also to create an energy-efficient and resource-cycled campus. Everyone on campus should be informed to form the habit of using resources properly and saving energy. In addition, the institutions should encourage students to use resources circularly.然而,在我看来,创建绿色校园,我们需要做的是不仅要种植更多的树和草来美化我们的校园环境也创造了一个节能和资源循环的校园。校园里的每一个人都应该被要求形成节约能源资源的习惯。此外,学校应鼓励学生资源循环利用。In a word, creating a green campus needs us to make joint efforts. And we can achieve it by doing pieces of small matters in daily life, such as turning off the light when leaving.总之,创建绿色校园需要我们共同的努力。我们可以在日常生活中的小事做起,如离开的时候关灯。2023-07-12 22:37:511
秋夜将晓出篱门迎凉有感这首诗的意思?
全诗的意思:三万里长的黄河奔腾向东流入大海,五千仞高的华山耸入云霄上摩青天。中原人民在胡人压迫下眼泪已流尽,他们盼望王师北伐盼了一年又一年。2023-07-12 22:37:526
如何创建美丽校园英语作文
I study in the No.I middle school,where there are three grades and thirty-two classes.It is not big but very beautiful.In the center of the school there is a new teaching building,which is very clean and beautiful.The lab building and the library are to the east of the new building.There all kinds of book in the library.You can enioy them as many as you like.South of the new building lies a playground and it"s very big.On the playground,you can have sports such as football.basketball.You"d better play basketball as there are four basketball grounds in our school,You can enjoy yourself very much.There are many trees in our school.Grass is everywhere.In front of the new building there are two gardens in which,there are flowers of all colours.We are studying hard in our school,Our life is happy and intcrcsting.I love our school very much.2023-07-12 22:37:581
以 greating green campus 为话题写一篇英语作文
英语作文要想写得好,离不开平时的积累,高分作文一般胜在行文清晰、准确、简洁三点,这就是公认的英语满分作文“黄金三定律”,为保证所写文章清晰明了,一是越确切具体越好,二是组织结构富有逻辑性。姐姐现在就为你们提供三篇与英语作文题目有关的范文,记得好好参考哦,如果对你有帮助记得点个赞再走。【一】U0001f338U0001f338U0001f338案例来咯英语作文:Recently, more and more universities have realized the importance of creating a green campus. It has become a new trend throughout the country.So what do we mean by green campus? On the one hand, the protection of the environment is necessary, and there is no denying that this is the premise of this concept. On the other hand, it is far from enough to keep the green environment simple in order to meet the overall goal of the green campus. On the contrary, it needs all the staff and all our efforts, the positive cultural atmosphere of the students.Therefore, in order to create green campus, first, it is necessary, everyone thinks of our own host campus, and to realize green enlightenment brings us a house. More importantly, action is needed to achieve that goal. Last but not least, we can spread the spirit, the broader area, and call for more people to join the project.翻译:近年来,越来越多的大学意识到创建绿色校园的重要性。这已成为全国各地的一种新趋势。那么,我们所说的绿色校园是什么意思呢?一方面,保护环境是必要的,而且不可否认,这是这一概念的前提。另一方面,它也很遥远 m足以保持绿色环境的简单性,以达到绿色校园的整体目标。相反,它需要所有的员工和我们所有的努力,需要积极的文化氛围 e学生。因此,为了创造绿色校园,首先有必要大家都想到自己的主办校园,实现绿色启蒙给我们带来一所房子。更重要的是,需要采取行动 实现这个目标。最后但并非最不重要的是,我们可以传播精神,更广泛的领域,并呼吁更多的人加入这个项目。【二】U0001f338U0001f338U0001f338案例来咯英语作文:Nowadays,campus construction has been brought into focus. According to a survey,almost all the schools and colleges are rebuilding their campus: not only the teaching buildings but also the circumstances. In this essay,I will discuss the importance of campus construction and offer my own view on it.A lot of efforts have been made to better the campus environment,in particular,the construction of a green campus. Many colleges have taken serious measures to build environmental friendly campus,such as lawns,artificial pools,and tree-lined roads. However,in my view,this is only the initial step and we can do more. To begin with,the schools and colleges may implement strict regulation of waste on campus: no matter the leftovers in canteens or the litter in classrooms. Moreover,on the student side,we can use green bags instead of disposable plastic bags and use more recycling chopsticks and bowls.In addition,the most important thing for everyone is that we should raise our awareness of environmental protection.翻译:如今,校园建设已成为人们关注的焦点。根据一项调查,几乎所有的学校和大学都在重建他们的校园:不仅是教学楼,还有周边建筑 nces.在本文中,我将讨论校园建设的重要性,并提出我自己的看法。为了改善校园环境,特别是绿色校园的建设,人们更加努力。许多高校已采取认真措施建设环保校园 这里有草坪、人工游泳池和绿树成荫的道路。然而,在我看来,这只是第一步,我们可以做得更多。首先,学校和大学可能会对废物o实施严格的管理 n校园:无论是食堂里的剩饭,还是教室里的垃圾。此外,在学生方面,我们可以使用绿色塑料袋代替一次性塑料袋,并使用更多的回收筷子和b 猫头鹰此外,对每个人来说,最重要的事情是,我们应该提高我们的环保意识。【三】U0001f338U0001f338U0001f338案例来咯英语作文:The university school is like another home for our students. Its environment will affect our healthy growth and study. So it is important to create a green campus.The definition of the green campus is not only referred to its green environment, but also its hardworking atmosphere. We must bear these in mind and put these into practice.As the managers of school, they can provide us with beautiful environment. But that is not enough. The campaign to create a green campus needs the participation of every one. Firstly, we should protect the trees, grasslands and flowers in our mother school. Secondly, when we see the behavior of destruction, don"t stand by and do something to combat it. Besides, we also can give wide publicity to creating a green campus.翻译:学校就像我们学生的另一个家。它的环境将影响我们的健康成长和学习。所以创建一个绿色的校园是很重要的。绿色校园的定义不仅是指它的绿色环境,也是指它的勤劳的氛围。我们必须牢记这些问题,并把它们付诸实践。作为学校的管理者,他们可以为我们提供美丽的环境。但这还不够。创建一个绿色校园的运动需要每个人的参与。首先,我们应该提出 在我们母亲的学校里的树木、草原和鲜花。其次,当我们看到破坏的行为时,不要袖手旁观,做些什么来对抗它。此外,我们还可以给予广泛的宣传 创建一个绿色校园。2023-07-12 22:38:051
秋夜将晓出篱门迎凉有感的诗意是什么?
《秋夜将晓出篱门迎凉有感》的意思是:三万里长的黄河奔腾翻涌着汇入大海,五千仞高的华山山巅直插云霄,中原的百姓们在异族胡人的压迫剥削之下眼泪都已经流干,他们一年复一年的盼望着朝廷的军队能够北伐收复失地。全诗原文如下:秋夜将晓出篱门迎凉有感作者:陆游三万里河东入海,五千仞岳上摩天。遗民泪尽胡尘里,南望王师又一年。赏析:这首七言绝句是南宋著名爱国诗人陆游被罢斥归乡后所作,当时的中原地区已经被金兵占领了多年,这首诗表现出诗人对于祖国统一的热切盼望,以及忧国忧民的愁绪。2023-07-12 22:37:271
秋夜将晓出篱门迎凉有感的诗意是什么?
意思是:1、其一迢迢万里的银河朝西南方向下坠,喔喔的鸡叫之声在邻家不断长鸣。疾病折磨我几乎把救亡壮志消尽,出门四望不禁手搔白发抱憾平生。2、其二三万里长的黄河奔腾向东流入大海,五千仞高的华山耸入云霄上摩青天。中原人民在胡人压迫下眼泪已流尽,他们盼望王师北伐盼了一年又一年。宋代陆游 《秋夜将晓出篱门迎凉有感》是一组组诗作品,作品原文为1、其一迢迢天汉西南落,喔喔邻鸡一再鸣。壮志病来消欲尽,出门搔首怆平生。2、其二三万里河东入海,五千仞岳上摩天。遗民泪尽胡尘里,南望王师又一年。扩展资料创作背景:这组爱国主义诗篇作于宋光宗绍熙三年(1192年)的秋天,当时陆游已经六十八岁,罢归山阴(今浙江绍兴)故里已经四年。但平静的村居生活并不能使老人的心平静下来。南宋时期,金兵占领了中原地区。诗人作此诗时,中原地区已沦陷于金人之手六十多年了。此时爱国诗人陆游被罢斥归故乡,在山阴乡下向往着中原地区的大好河山,也惦念着中原地区的人民,盼望宋朝能够尽快收复中原,实现统一。此时虽值初秋,暑威仍厉,天气的热闷与心头的煎沸,使他不能安睡。将晓之际,他步出篱门,以舒烦热,心头怅触,写下这两首诗。思想感情:第一首落笔写银河西坠,鸡鸣欲曙,渲染出一种苍茫静寂的气氛,表现了有心杀敌无力回天的感慨。第二首写大好河山,陷于敌手,以“望”字为眼,表现了诗人希望、失望而终不绝望的千回百转的心情。诗境雄伟、严肃、苍凉、悲愤。参考资料来源:百度百科-秋夜将晓出篱门迎凉有感二首2023-07-12 22:37:201
校园环保英语作文范文
【 #英语资源# 导语】在日复一日的学习、工作或生活中,大家都不可避免地要接触到作文吧,作文是一种言语活动,具有高度的综合性和创造性。那么你有了解过作文吗?以下是 为大家精心整理的内容,欢迎大家阅读。 1.校园环保英语作文范文 Spring is coming, and the campus becomes more beautiful! Look, how beautiful the green grass on the lawn is, and how colorful the flowers on the grass are! The little guard came to the playground and saw Xiaoli eating banana peel. In the twinkling of an eye, Xiaoli threw the banana peel on the playground. The little guard saw it and said seriously: Xiaoli, please throw the garbage into the trash can. Xiaoli said carelessly: why? Because you want to protect the campus environment. The little guard said seriously, and Xiao Li said: why should I listen to you? If everyone is like you, will our campus be so beautiful? The little guard said calmly: pick it up! Xiao Li picked it up in shame. The campus has become more beautiful and beautiful. 2.校园环保英语作文范文 Dear students The earth provides us with all kinds of resources free of charge, but we destroy her recklessly for a little petty profit. As the article "there is only one earth" said, "we can no longer expect to destroy the earth and move to other planets. If the earth dies, the fate that comes to the earth will eventually come to mankind. When you study in this beautiful campus and work hard for our bright future, I believe every one of our students is eager to have a clean campus, healthy life, green and a good living environment. The school is a place for educating people. Environmental education is one of the basic means to improve our ideological and moral quality and scientific and cultural quality. Establishing an energy-saving and environment-friendly campus is not only the need of the school"s own development, but also the due social responsibility of our middle school students. In order to strengthen everyone"s awareness of environmental protection and make the campus and class environment cleaner and beautiful, In favor of creating a green and harmonious campus environment, our "campus environmental protection volunteer" activity group earnestly puts forward the following suggestions to teachers and students: 1. Establish the concept of green civilization, consciously care about environmental conditions, and regard personal environmental protection behavior as an integral part of personal civilization cultivation. 2. Do not litter, peel and paper scraps, do not spit, do not pick every plant on the campus at will, and take good care of the public green space. 3. Take good care of instruments, equipment and public property, keep the equipment in good condition, and minimize damage and maintenance. 4. Save water, cherish water resources and reduce water pollution; Save electricity, make sure that the lights are off when people walk, do not turn on the lights when the light is sufficient, avoid the occurrence of "daytime lights" and "long-term lights", and shut down the computer in the microcomputer room in time after use. 5. Save paper, use less napkins and draft paper on both sides as much as possible. 6. Live frugally, do not waste food and leftovers at will, and cultivate good living habits. 7. Try to use less plastic bags and disposable paper cups and plastic cups. 8. Starting from me, I call on all students to establish environmental awareness and contribute to the creation of a green and harmonious campus. 3.校园环保英语作文范文 Who doesn"t want the lush grass? Who doesn"t want to sit on the grass and enjoy the sun? Who doesn"t want leisure books on the green lawn? Now the school provides us with everything, but the white plastic bag is occasionally blown by the strong wind. Whose fault is this? This is our fault. We should enhance our awareness of environmental protection and create a green campus. One day, I saw a piece of information on environmental protection on my computer. The information shows that with the development of industrialization and the rapid growth of the world population, the earth"s environment has been destroyed unprecedentedly, resulting in air pollution, climate deterioration, depletion of the ozone layer, depletion of fresh water resources, pollution of rivers, lakes and marine environment, land degradation, loss of forests, sharp decline of biodiversity Acid deposition, the spread of harmful and toxic substances, the spread of diseases and other similar problems have seriously affected the improvement of human quality of life, and even threatened human survival. After reading this information, I was shocked. I felt that it was urgent to strengthen environmental education and improve people"s awareness of environmental protection. Environmental protection is closely related to everyone. We should start from the small things around us, such as: if the faucet is not closed tightly, tighten it immediately. We should know that if a faucet leaks a drop of water in one second, 360t of water will drop in a year; Every 1m3 less water is used, 0.6 ~ 0.7m3 less sewage will be discharged; Use less or no disposable chopsticks, otherwise many trees will be "sacrificed"; Whenever the festival comes, try not to send greeting cards to each other. You know, 4000 greeting cards will cut down a big tree! Waste paper must not be thrown around. A ton of waste paper can be recycled into 800kg good paper, which can cut down 17 trees less, save 3m3 landfill space, and do not climb flowers and trees or trample on the lawn; Save water, electricity and food; Do not use tableware that pollutes the environment; Do not throw garbage and paper scraps at will; Choose green food and use degradable plastic bags to reduce the pollution of municipal solid waste; Choose to use phosphorus free washing powder and recycled paper to reduce water pollution; Care for the surrounding environment and participate in the classified recycling of waste batteries; Do not make noise at will, and do not make noise in public places...... I have heard that college students have the advantage of high education and shoulder the important responsibility of future construction, that is, environmental protection. We contemporary primary school students also have the responsibility and obligation to make some contributions to environmental protection and do our part. We must first "dress up" our home - campus. Take good care of every plant, brick and stone on the campus, and let the grass and flowers in the school dress up our home more beautiful! Do not speak in class, be polite, modest and tolerant, and create a harmonious and civilized dormitory environment, class environment and campus environment. "Build a green, harmonious and civilized campus!" Not empty slogans, but real actions. Let"s take action immediately! We are the masters of the 21st century. We should establish a sense of responsibility for the times. Don"t litter everywhere; Bend over to pick up peel and paper scraps; Take a few more steps. Don"t walk through the flowers and grass and trample on the green space“ Don"t be good and don"t be evil. "Start with me, start from childhood, start from your side, and start from now on. Let the slogan become our real action!2023-07-12 22:37:181
英语作文 绿色校园八十字
CreateaGreenCampusItisofgreatimportancetomakeandmaintainagreencampusinouruniversityorcollege.Obviously,agrowingnumberofpeoplearebeginningtorealizethatitisourdutytodothatinthepresentdays,sincetheconceptof“agreenworld”hasbecomethefocusofthesociety.Theideaof“agreencampus”isbeyondagreenenvironment.Tobeginwith,thedevelopmentonthecampusistobesustainableandrecyclable.Someoftheauthorities"budgetshouldbeonhowtoreduceofthewaste.What"smore,we"dbetterbeawareoftheseriousnessofpollutionaroundus.Thustheideaofenvironmentalprotectionmaybecomeacommonoccurrenceinourdailylife.Itisnecessarythateffectiveactionsshouldbetakentoprotectourcampusfromwasteandpollution,andhencetheseactivitiesaretoplayanincreasinglyimportantroleinourday-to-daylife.Certainly,thereislittledoubtthatfurtherconsiderationmustbepaidtoourgreencampuses.2023-07-12 22:37:111
英语作文建设绿色校园
建设绿色校园 Building green campus Nowadays,campus construction has been brought into focus. According to a survey,almost all the schools and colleges are rebuilding their campus: not only the teaching buildings but also the circumstances. In this essay,I will discuss the importance of campus construction and offer my own view on it. A lot of efforts have been made to better the campus environment,in particular,the construction of a green campus. Many colleges have taken serious measures to build environmental friendly campus,such as lawns,artificial pools,and tree-lined roads. However,in my view,this is only the initial step and we can do more. To begin with,the schools and colleges may implement strict regulation of waste on campus: no matter the leftovers in canteens or the litter in classrooms. Moreover,on the student side,we can use green bags instead of disposable plastic bags and use more recycling chopsticks and bowls. In addition,the most important thing for everyone is that we should raise our awareness of environmental protection. 如今,校园建设已成为人们关注的焦点。据一项调查显示,几乎所有的学校和大学都在重建自己的校园,不仅是教学楼,而且还处于环境。在这篇文章中,我将讨论校园建设的重要性,并提出我自己的看法。许多努力都是为了更好地改善校园环境,特别是一个绿色校园的建设。许多大学已经采取了严重的.措施,建立环境友好的校园,如草坪,人工池,和树木林立的道路。然而,在我看来,这只是初步的一步,我们可以做更多的。首先,学校和大学可以实现校园浪费严格规定:无论在食堂或在教室乱扔剩饭剩菜。此外,在学生方面,我们可以使用环保袋,而不是一次性塑料袋,并使用更多的回收筷子和碗。此外,最重要的是,我们应该提高我们的环保意识。2023-07-12 22:37:011
秋夜将晓出篱门迎凉有感中心思想
《秋夜将晓出篱门迎凉》表达了作者对祖国大好河山的热爱,对百姓的痛苦极大的同情,对南宋统治者不图收复失地而偏安一隅无比的愤慨的思想感情。《秋夜将晓出篱门迎凉》宋·陆游三万里河东入海,五千仞岳上摩天。遗民泪尽胡尘里,南望王师又一年。译文万里长的黄河奔腾向东流入大海,千仞高的华山耸入云霄触青天。中原人民在胡人压迫下眼泪已流尽,他们盼望王师北伐盼了一年又一年。作者简介陆游,字务观,号放翁,是我国南宋的著名诗人。中年入蜀,投身军旅生活,官至宝章阁待制。晚年退居家乡,但收复中原信念始终不渝。他创作的是个很多,内容极为丰富,词作量不如诗篇巨大,但和诗同样贯穿了气吞残虏的爱国主义精神,代表作有《十一月四日风雨大作二首》、《冬夜读书示子聿》、《临安春雨初霁》等。2023-07-12 22:36:513
求批改英语作文
你几年级,年级不同要求不同2023-07-12 22:36:442