神马作文网号表示什么?比如(1+1/n)^n=1+(n/1!)*(1/n)+[n(n-1)/2!]*(1/n^2)+.
![号表示什么?比如(1+1/n)^n=1+(n/1!)*(1/n)+[n(n-1)/2!]*(1/n^2)+.](/uploads/image/z/16633758-30-8.jpg?t=%E5%8F%B7%E8%A1%A8%E7%A4%BA%E4%BB%80%E4%B9%88%3F%E6%AF%94%E5%A6%82%281%2B1%2Fn%29%5En%3D1%2B%28n%2F1%21%29%2A%281%2Fn%29%2B%5Bn%28n-1%29%2F2%21%5D%2A%281%2Fn%5E2%29%2B.)
2^n/n*(n+1)
证明不等式：(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n
(n+1)^n-(n-1)^n=?
+(n-1)!+(n-2)!+.+(n-n)!等于什么?
阶乘(2n-1)!=（2n)!/(2^n*n!
[3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简
Sn=n(n+2)(n+4)的分项等于1/6[n(n+2)(n+4)(n+5)-(n-1)n(n+2)(n+4)]吗?
1 + (n + 1) + n*(n + 1) + n*n + (n + 1) + 1 = 2n^2 + 3n + 3
证明(1+2/n)^n>5-2/n（n属于N+,n>=3)
化简(n+1)(n+2)(n+3)
n(n+1)(n+2)数列求和
n(n+1)(n+2)等于多少?