lim(n→∞) 2n^2+1/3n^2-4

求lim n→∞ (1+2/n)^n+3 求极限lim [ 2^(n+1)+3^(n+1)]/2^n+3^n (n→∞) lim(n→∞)[1/(3n+1)+1/(3n+2)+~1/(3n+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） 一道极限题,lim[n^2(2n+1)]/(n^3+n+4)n->∞ lim((5^n-4^(n-1))/((5^(n+1)+3^(n+2)) n→∞时的极限是多少? lim[(n+3)/(n+1))]^(n-2) 【n无穷大】 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(n→∞) 2的2n次方-8/4n次方+3n次方 lim(n→∞)3n^2+5n-7/4-n^2的值是