2n-n2+n-1 如何计算 假设n等于25,结果是什么.
请问如何证明lim(n→∞)[n/(n2+n)+n/(n2+2n)+…+n/(n2+nn)]=1,
+(n-1)!+(n-2)!+.+(n-n)!等于什么?
计算lim(1/n2+1+2/n2+1+3/n2+1+...+n/n2+1)
大一求极限lim(n/(n2+1)+n/(n2+2^2)+……+n/(n2+n2))
求极限lim((n+1)/(n2+1)+(n+2)/(n2+2)+...+(n+n)/(n2+n)),n趋近无穷
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]
2N N2 2N2
求 证Lim ( n/ n2+1) + (n/ n2+2) +( n/ n2+3).+(n/n2+n)当n趋向无穷时的极
∑【上标2012,下标n=1,右边为1/n(n+1)】问:计算结果是多少?1/n(n+1)代表什么?
lim[n/(n^2+1^2)+n/(n2+2^2)+···n/(n^2+n^2)] n->无穷大
n(n+1)(n+2)等于多少?
若f(n)=√n2+1 -n ,g(n)=n-√n2-1,c(n)=1/2n(n大于或等于2且属于正实数)