(2n+1)(2n-1)=35(n-2)求解和过程
2^n/n*(n+1)
证明不等式:(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n
求解(n/2n+1)的n次方的lim n-0的极限
n→无穷大 sin^n(2nπ/3n+1)的极限怎么求解
阶乘(2n-1)!=(2n)!/(2^n*n!
数列求和:S(n)=∑n/(2n+1)! n从1到无穷大...求解啊.
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?
(3m-2n)(3m+2n+1)求解
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)
求数列an=n(n+1) 的前n项和 到 an=n(n+1)=[n(n+1)(n+2)-(n-1)n(n+1)]/3(裂
求数列Cn=(2n+1)/(2^n+1)的前n项和(请写个详细的过程,