-n^3+8n^2-16n

-n^3+8n^2-16n 证明不等式：(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n M=(N-1)×1+(N-2)×2+(N-3)×4+(N-4)×8+(N-5)×16+(N-6)×32+(N-7)×64 极限练习题lim(n->∞)[(n^2+3n-8)/(4n^2+2n+3)] 16n^a+4n^3+6n^2+7^n=0,求n [3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简 化简(n+1)(n+2)(n+3) 一道数列求和题1/2n+3/4n+5/8n+...+（2n-1）/n*2^n 计算1/(m-n)-1/(m+n)-2n/(m^2+n^2)-4n^3/(m^4+n^4)-8n^7/(m^8+n^8) lim[(n+3)/(n+1))]^(n-2) 【n无穷大】 计算：n(n+1)(n+2)(n+3)+1 (1/(n^2 n 1 ) 2/(n^2 n 2) 3/(n^2 n 3) ……n/(n^2 n n)) 当N越于无穷大