求极限Xn=1/(n^2+1)+2/(n^2+2)+3/(n^2+3)+……+n/(n^2+n)
求极限Xn=n/(n^2+1)+n/(n^2+2)+n/(n^2+3)+……+n/(n^2+n),
求极限Xn=1/(n^2+1)+2/(n^2+2)+3/(n^2+3)+……+n/(n^2+n)
Xn=(2^n-1)/3^n的极限
证明不等式:(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n
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
求极限 lim(n->无穷)[(3n^2-2)/(3n^2+4)]^[n(n+1)]
求极限lim [ 2^(n+1)+3^(n+1)]/2^n+3^n (n→∞)
求极限 n趋向无穷 2^n+1 + 3^n+1/2^n+3^n
求(1^n+2^n+3^n)^1/n,n趋于无穷大的极限
lim n →∞ (1^n+3^n+2^n)^1/n,求数列极限
求极限lim(x→∞)(1/n+2/n+3/n..+n/n)
请问Xn=(2^n-1)/3^n的极限如何去求?