求极限lim 2/(3^n-1)

求极限lim 2/(3^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(x→∞)（1/n+2/n+3/n..+n/n） 求极限lim(n+1/n+3)^n如题 求极限n~∞,lim(n+1)/2n 求极限Lim（(n-x)/(n+2))^(n+1) lim (1+2/n)^n+4 n-->无穷大 求极限 求极限lim(-2)^n+3^n/(-2)^[n+1]+3^[n+1] (x→∞) 求极限lim (3^n+1-2^n+1)/(3^n+2^n) 求极限：lim((2n∧2-3n+1)/n+1)×sin n趋于无穷 求极限lim(n→∞)(3n^2-n+1)/(2+n^2)? 求lim(n->无穷)(3n+5)/(n^2+n+4)^1/2的极限 求极限：lim{1+[1/(2n-1)]}^n 高数 数列极限lim(1+ 2^n + 3^n)^(1/n) n趋于无穷大求极限 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 x→∞lim(3^n+1)/(3^(n+1)+2^n)= 求极限lim[n→∞](n^2+1)/(2n^2+3)