早教吧作业答案频道 -->数学-->
lim(n/(n^2+1)+n/(n^2+2^2)+……+n/(n^2+n^2))n^2指n的平方
题目详情
lim(n/(n^2+1)+n/(n^2+2^2)+……+n/(n^2+n^2))
n^2 指n的平方
n^2 指n的平方
▼优质解答
答案和解析
lim(n/(n^2+1)+n/(n^2+2^2)+……+n/(n^2+n^2))
=lim1/n*[1/(1+1/n^2)+1/(1+(2/n)^2)+……+1/(1+(n/n)^2)]
根据定积分的定义.
对于∫1/(1+x^2) x∈(0,1)
=lim∑1/n*(1/(1+(i/n)^2)
=lim1/n*[1/(1+1/n^2)+1/(1+(2/n)^2)+……+1/(1+(n/n)^2)]
则lim(n/(n^2+1)+n/(n^2+2^2)+……+n/(n^2+n^2))
=lim1/n*[1/(1+1/n^2)+1/(1+(2/n)^2)+……+1/(1+(n/n)^2)]
=∫1/(1+x^2) x∈(0,1)
=arctanx x∈(0,1)
=π/4
=lim1/n*[1/(1+1/n^2)+1/(1+(2/n)^2)+……+1/(1+(n/n)^2)]
根据定积分的定义.
对于∫1/(1+x^2) x∈(0,1)
=lim∑1/n*(1/(1+(i/n)^2)
=lim1/n*[1/(1+1/n^2)+1/(1+(2/n)^2)+……+1/(1+(n/n)^2)]
则lim(n/(n^2+1)+n/(n^2+2^2)+……+n/(n^2+n^2))
=lim1/n*[1/(1+1/n^2)+1/(1+(2/n)^2)+……+1/(1+(n/n)^2)]
=∫1/(1+x^2) x∈(0,1)
=arctanx x∈(0,1)
=π/4
看了lim(n/(n^2+1)+n...的网友还看了以下:
(1)解出下列方程的解:(x^2-x)^2-5(x^2-x)+6=0(2)解出下列方程的解:(x+ 2020-05-22 …
在平面直角坐标系xOy内有三个定点A(2,2).B(1,3),C(1,1),记△ABC的外接圆为E 2020-06-12 …
求1+2+2^2+2^3+2^4+…+2^2014的值.设S=1+2+2^2+2^3+2^4+…+ 2020-07-09 …
圆锥曲线问题已知与曲线C:x^2+y^2-2x-2y+1=0相切的直线L交x轴、y轴于A、B两点, 2020-08-02 …
x→0时lim[1/ln(1+x^2)-1/(sinx)^2]=lim[(sinx)^2-ln(1 2020-08-02 …
x→0时lim[1/ln(1+x^2)-1/(sinx)^2]=lim[(sinx)^2-ln(1 2020-08-02 …
xyz=1,x+y+z=2,x^2+y^2+z^2=3,求x,y,z我解:xy=1/z,x+y=2- 2020-10-31 …
观察下列各式然后回答问题:1-1/2^2=1/2*2/3,1-1/3^2+2/3*4/3,1-1/4 2020-11-01 …
已知a,b属于正实数a^2+b^2/2=1求y=a√(1+b^2)的最大值参考书上是用y^2=[a√ 2020-12-31 …
这些题怎么数学解1已知(x+m)^2(x^2-2x+3)+x(x+1)中不含x^2项求m的值2已知a 2020-12-31 …