求lim(n+1)(n+2)(n+3)/(n^4+n^2+1)

求lim n→∞ (1+2/n)^n+3 求1.lim(3n-(3n^2+2n)/(n-1)) 2.lim(8+1/(n+1)) 3.lim根号n(根号(n+1)-根号(n-3)) 求极限lim [ 2^(n+1)+3^(n+1)]/2^n+3^n (n→∞) 求lim(n+1)(n+2)(n+3)/(n^4+n^2+1) 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） lim(n+3)(4-n)/(n-1)(3-2n) lim(n^3+n)/(n^4-3n^2+1) lim[(n+3)/(n+1))]^(n-2) 【n无穷大】 lim(2^n+3^n)^1 (n趋向无穷) lim(n→∞) 1/(n+1)-2/(n+1)+3/(n+1)-4/(n+1)+...+[(2n-1)/(n+1)]-[(2n)/(n-1)]求极限 求lim(n→∞)(3n^3+2n^2+1)/(2n^2+3) 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lim趋向于无穷3^n+(-2)^n/3^(n+1)+(-2)^(n+1) lim((n^2+2n-1)/(2n^2-n+3))的值 求详解 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)?