1.2/n(n+1)(n+2)2.n(n+1)(n+2)3.n(n+1)4,∑k3=1^3+2^3+……n^3=

来源：学生作业帮助网 编辑：作业帮 时间：2024/10/06 11:07:53
1.2/n(n+1)(n+2)2.n(n+1)(n+2)3.n(n+1)4,∑k3=1^3+2^3+……n^3=
x)336FFzHc(DQlc[8cm# ~԰ mmэ1QΆ:zhV e@_\gyΎg-3I &]

1.2/n(n+1)(n+2)2.n(n+1)(n+2)3.n(n+1)4,∑k3=1^3+2^3+……n^3=
1.2/n(n+1)(n+2)
2.n(n+1)(n+2)
3.n(n+1)
4,∑k3=1^3+2^3+……n^3=

1.2/n(n+1)(n+2)2.n(n+1)(n+2)3.n(n+1)4,∑k3=1^3+2^3+……n^3=
1、1/(n+1)n-1/(n+1)(n+2)

什么意思？

2^n/n*(n+1) 证明不等式：(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n n n n n (n+2)!/(n+1)! [3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简 [3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简 化简n分之n-1+n分之n-2+n分之n-3+.+n分之1 化简n分之n-1+n分之n-2+n分之n-3+.+n分之1 f(x)=e^x-x 求证(1/n)^n+(2/n)^n+...+(n/n)^n n^(n+1/n)/(n+1/n)^n 化简(n+1)(n+2)(n+3) n*【n+1】*【n+2】化简成什么? 2n/（n+1）n! n(n+1)(n+2)等于多少? n+(n-1)÷2×n 求化简