求1*32*43*5……n(n2)之和

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求极限lim(n/(n2+1)+n/(n2+2^2)+……+n/(n2+n2))

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已知下列n2个自然数之和为36100,求n.1,2,3,…n,2,4,6…2n n,2n,3n…n2

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大一求极限lim(n/(n2+1)+n/(n2+2^2)+……+n/(n2+n2))pi/4

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如何求当n→a时,1/n2+n+1 + 2/n2+n+2 + ……+ n/n2+n+n的极限?注:n

如何求当n→a时,1/n2+n+1+2/n2+n+2+……+n/n2+n+n的极限?注:n2=n的平方先看极限里面的,不妨设那一串为F(n)因为(n2=n的平方):1+2+……+n/n2+n+n(为方

求极限:当n→无穷,1/(n2+n+1)+2/(n2+n+2)+……+n/(n2+n+n)等于?注:

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求 证Lim ( n/ n2+1) + (n/ n2+2) +( n/ n2+3).+(n/n2+n

求证Lim(n/n2+1)+(n/n2+2)+(n/n2+3).+(n/n2+n)当n趋向无穷时的极限为1求证Lim(n/n2+1)+(n/n2+2)+(n/n2+3).+(n/n2+n)当n趋向无穷

求极限lim((n+1)/(n2+1)+(n+2)/(n2+2)+...+(n+n)/(n2+n))

求极限lim((n+1)/(n2+1)+(n+2)/(n2+2)+...+(n+n)/(n2+n)),n趋近无穷求极限lim((n+1)/(n2+1)+(n+2)/(n2+2)+...+(n+n)/(

证明:12+22+32+……+n2=1/6n(n+1)(2n+1)

证明:12+22+32+……+n2=1/6n(n+1)(2n+1)证明:12+22+32+……+n2=1/6n(n+1)(2n+1)证明:12+22+32+……+n2=1/6n(n+1)(2n+1)1

请问如何证明lim(n→∞)[n/(n2+n)+n/(n2+2n)+…+n/(n2+nn)]=1,以

请问如何证明lim(n→∞)[n/(n2+n)+n/(n2+2n)+…+n/(n2+nn)]=1,以及请问如何证明lim(n→∞)[1/√(n2+1)+1/√(n2+2)…+1/√(n2+n)]=1利

求 lim n→∞ n2[(1/n2+1)2+2/(n2+2)2...+n/(n2+n)2]第七题.

求limn→∞n2[(1/n2+1)2+2/(n2+2)2...+n/(n2+n)2]第七题...好心的话帮忙把第6题也解了吧(lim后面是Xn).被高数虐啊TT求limn→∞n2[(1/n2+1)2

1.求lim[1/(n2+n+1)+2/(n2+n+2)+.+n/(n2+n+n)][n趋于无穷][

1.求lim[1/(n2+n+1)+2/(n2+n+2)+.+n/(n2+n+n)][n趋于无穷][n2为n的平方]2.求当x趋于0时,lim(tanx-sinx)/(sinx)3[sinx的三次方]

已知12+22+32+….n2=(1/6)n(n+1)(2n+1),试求22+42+62….+502

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已知:12+22+32+…+n2=1/6n(n+1)(2n+1),试求22+42+62+…+1002

已知:12+22+32+…+n2=1/6n(n+1)(2n+1),试求22+42+62+…+1002已知:12+22+32+…+n2=1/6n(n+1)(2n+1),试求22+42+62+…+1002

求数列5,55,555,…前n项之和

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求n阶方阵的所有元素之和 n阶方阵是这样的 括号不写了 1 2 .n2 3 ...n+1......

求n阶方阵的所有元素之和n阶方阵是这样的括号不写了12.n23...n+1...........nn+1.n+2求n阶方阵的所有元素之和n阶方阵是这样的括号不写了12.n23...n+1.......

N是1990位数,并且是9的倍数.N的各位数字之和为N2,N2的各位数之和为N3,求N3

N是1990位数,并且是9的倍数.N的各位数字之和为N2,N2的各位数之和为N3,求N3N是1990位数,并且是9的倍数.N的各位数字之和为N2,N2的各位数之和为N3,求N3N是1990位数,并且是

求n+32/n2的最小值

求n+32/n2的最小值求n+32/n2的最小值求n+32/n2的最小值 

求(n2+8)/(n+1)的最小值,

求(n2+8)/(n+1)的最小值,求(n2+8)/(n+1)的最小值,求(n2+8)/(n+1)的最小值,求导

高中数学提问题1. 已知1+2+3+……+n/1+3+5+……+(2n-1)=10/19,求n2.已

高中数学提问题1.已知1+2+3+……+n/1+3+5+……+(2n-1)=10/19,求n2.已知数列{an}是等差数列,它的前n项和为Sn,a1+a2+a3=4,a3+a4+a5=10,求Sn请写

(5n2+3n+1)/n3+n2+5的极限

(5n2+3n+1)/n3+n2+5的极限(5n2+3n+1)/n3+n2+5的极限(5n2+3n+1)/n3+n2+5的极限lim(5n2+3n+1)/n3+n2+5(n趋向无穷大)=lim(5n^