求lim n→∞ 1+2+…+n/2n+1的极限

求lim n→∞ (1+2/n)^n+3 求当n→∞,Lim(1+2+3+4+……+(n-1)+n)/n 求极限lim [ 2^(n+1)+3^(n+1)]/2^n+3^n (n→∞) 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） 用夹逼定理求lim(n→∞)[√(n^2+n)-n]^(1/n) 求极限lim(n→∞)(1/n²+2/n²+...+n/n²) 用夹逼定理求lim(n→∞)√[(n^2+n)-n]^(1/n) 求lim n→+∞(1/n^k+2/n^k+ +n/n^k)有三种情况, lim n→∞[1/(n+1)+1/(n+2)+…+1/(n+n)]=?求极值!lim [1/(n+1)+1/(n+2)+…+1/(n+n)]=?n→∞ 求极限n~∞,lim(n+1)/2n 求极限lim n→∞(1/(n+1)+1/(n+2)+.+1/(n+n) 求极限(1/(n+1)+1/(n+2)+.+1/(n+n) 求lim n→∞ 1+2+…+n/2n+1的极限 求lim(n→∞)(3n^3+2n^2+1)/(2n^2+3) 求极限lim(n→∞)(3n^2-n+1)/(2+n^2)? 求极限lim(-2)^n+3^n/(-2)^[n+1]+3^[n+1] (x→∞) lim（1/n+2^1/n）^n n→∞求详解!高数极限 lim(n→∞) 1/(n+1)-2/(n+1)+3/(n+1)-4/(n+1)+...+[(2n-1)/(n+1)]-[(2n)/(n-1)]求极限