早教吧作业答案频道 -->数学-->
求证:2/X*X-1+4/x*x-4+6/x*x-9+.+20/x*x-100=11/(x-1)(x+10)+11/(x-2)(x+9)+.+11/(x-10)(x+1)求证:2/(X*X-1)+4/(x*x-4)+6/(x*x-9)+......+20/(x*x-100)=11/(x-1)(x+10)+11/(x-2)(x+9)+.....+11/(x-10)(x+1)
题目详情
求证:2/X*X-1 + 4/x*x-4 + 6/x*x-9 + .+ 20/x*x-100 = 11/(x-1)(x+10) + 11/(x-2)(x+9) + .+ 11/(x-10)(x+1)
求证:2/(X*X-1) + 4/(x*x-4) + 6/(x*x-9) + ......+ 20/(x*x-100) = 11/(x-1)(x+10) + 11/(x-2)(x+9) + .....+ 11/(x-10)(x+1)
求证:2/(X*X-1) + 4/(x*x-4) + 6/(x*x-9) + ......+ 20/(x*x-100) = 11/(x-1)(x+10) + 11/(x-2)(x+9) + .....+ 11/(x-10)(x+1)
▼优质解答
答案和解析
因为 2n/(x²-n²)=1/(x-n)+1/(x+n)
所以左边=1/(x-1)+1/(x+1)+1/(x-2)+1/(x+2)+……+1/(x-10)+1/(x+10),
再根据右边式子的分母两两合并一下就变成右边的式子了.
所以左边=1/(x-1)+1/(x+1)+1/(x-2)+1/(x+2)+……+1/(x-10)+1/(x+10),
再根据右边式子的分母两两合并一下就变成右边的式子了.
看了 求证:2/X*X-1+4/x...的网友还看了以下:
阅读下列因式分解的过程,再回答所提出的问题:1+x+x(x+1)+x(x+1)2=(1+x)[1+ 2020-04-08 …
lim(x->0)(1/x-1/e^x-1)我这种解法错在哪里?我的解法如下lim(x->0)(1 2020-05-15 …
解分式方程:1/X-2+1/X-6=1/X-7+1/X-11/X-2+1/X-6=1/X-7+1/ 2020-05-16 …
1+x+x(x+1)+x(x+1)的平方=1+x+x(x+1)+x(x+1)2(为次方)=(1+x 2020-06-12 …
1.7/x²-1+8/x²-2x=37-9x/x^3-x²-x+12.3/x²+x-2=x/x-1 2020-07-18 …
分段函数求导?设f(x)={[(1+x)^(1/x0]-e,x不等于00,x=0求f(x)在x=0 2020-07-22 …
方程1/x-7-1/x-5-1/x-6-1/x-4的解是x=11/2,而7+5+6+4/4=11/ 2020-07-31 …
用数学归纳法证明,1+X+X^2+...+X^N=1-X^N+1/1-X证:当N=1,左式=1+X 2020-08-01 …
用数学归纳法证明(1-x)(1+x+x^2+……+x^(n-1))=1-x^n证:当N=1时,(1 2020-08-01 …
探索题:(X-1)(X+1)=X的平方-1(X-1)(X+1)=X的平方-1(X-1)(X的平方+X 2020-10-31 …