求极限lim(x→∞)（1/n+2/n+3/n..+n/n）

求极限lim(x→∞)（1/n+2/n+3/n..+n/n） 求极限lim(-2)^n+3^n/(-2)^[n+1]+3^[n+1] (x→∞) 求极限 x→∞lim(3^n+1)/(3^(n+1)+2^n)= 求极限Lim（(n-x)/(n+2))^(n+1) 1.6求极限lim(x→∞) [1+2+3+......+(n-1)]/ n^21.6求极限lim(x→∞) [1+2+3+......+(n-1)]/ n^2 求极限：lim(x→无穷)(2^n-7^n)/(2^n+7^n-1)=? 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(n→∞)(1/n²+2/n²+...+n/n²) 求 lim (n→+∞) n^( 1/n)的极限 1.7求极限lim(x→∞) [(n+1)(n+2)(n+3)]/5 n^31.7求极限lim(x→∞) [(n+1)(n+2)(n+3)]/5 n^3 求极限n~∞,lim(n+1)/2n 求极限：lim(n→∞)(x+1)(x-2)/(2x+1)(x-1) lim 2^n *sin(x/2^n)n→∞求极限 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) 求极限lim(n→∞)(3n^2-n+1)/(2+n^2)? lim（1/n+2^1/n）^n n→∞求详解!高数极限 利用无穷小的性质求极限lim(x→+∞)[(n^2+1)/n^3]sin(n!)=