求 1/(2^n +1)+2/(2^n +1)+……+2n/2^n+1 的极限
求n/2(n+1)的极限
求极限 lim n[1/(n^2+1)+1/(n^2+2^2)+……+1/(n^n+n^n)] (n趋向于无穷大,n^n
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求极限Xn=n/(n^2+1)+n/(n^2+2)+n/(n^2+3)+……+n/(n^2+n),
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求(1^n+2^n+3^n)^1/n,n趋于无穷大的极限
求x趋近于0时候的极限 [(n!)^(-1) * n^(-n) * (2n)!]^(1/n)
lim(n→∞) ((2n!/n!*n)^1/n的极限用定积分求
(2+1/n)^n求极限
lim[n/(n*n+1*1)+n/(n*n+2*2)+...+n/(n*n+n*n)],当x趋向无穷大时,怎么求极限,
求极限[(n^2+n)^1/2]-n
求极限n~∞,lim(n+1)/2n