求极限 n趋向无穷 2^n+1 + 3^n+1/2^n+3^n

求极限 n趋向无穷 2^n+1 + 3^n+1/2^n+3^n 微积分求极限 n趋向于无穷 (根号(n^4+n+1)-n^2)(3n+4) 为什么是1.5 求极限 lim 【（1+2+3+...+n）/（n+2）-n/2】趋向是无穷 n趋向正无穷 求极限n*[e^2-(1+1/n)^2n] 求极限:Lim(1+1/n-1/n^2)^n n趋向于正无穷 求极限 n趋向于无穷 lim（(根号下n^2+1)/(n+1)）^n 求极限lim(n趋向于无穷）(n+1)(根号下(n^2+1)-n) 求n趋向无穷时 [(1+1/n)(1+2/n)...(1+n/n)]^1/n 的极限? 求极限 lim(n->无穷)[(3n^2-2)/(3n^2+4)]^[n(n+1)] (n+2)^3/(n+1)^4的极限(当n趋向于无穷) 当n趋向于无穷时,求(n+3*（n^0.5）)^0.5 - (n-n^0.5)^(1/3)的极限 . （2＋（2／3）^1／n)^n,求当n趋向于正无穷的极限