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 n趋向无穷,求极限(3n+1)/(3n-1)的2n+3次方 求极限 lim 【（1+2+3+...+n）/（n+2）-n/2】趋向是无穷 求lim(-1+3^n)/2^(n+1)的极限(N趋向正无穷) 求极限 lim (1+2+3+...+n/n+2-n/2)趋向是正无穷lim (1+2+3+...+n/(n+2)-n/2)趋向是正无穷 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(1/n^2)/(e^(1/n)-1-1/n) n趋向于无穷 当n趋向于无穷时,求n^(1/2)*[n^(1/n)-1]的极限 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) 求极限 lim(n+1/n+2)^n.n趋向无穷 lim n趋向正无穷 求(1+1/n^3)^n的极限 n^2/3^n当n趋向于无穷时求极限 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趋向于无穷（1/n）*√(n+1)(n+2)⋯(n+n) （2＋（2／3）^1／n)^n,求当n趋向于正无穷的极限 求极限 N趋向于正无穷时 1/(n^2+1^2)+2/(n^2+2^2)+3/(n^3+3^2)+...+n/(n^2+n^2)