求极限：lim(1+1/2+1/4+……+1/2的n-1次方)

求极限lim 2/(3^n-1) 求极限：lim(1+1/2+1/4+……+1/2的n-1次方) lim (1+2/n)^n+4 n-->无穷大 求极限 求极限lim(n/(n2+1)+n/(n2+2^2)+……+n/(n2+n2)) 求lim n→∞ 1+2+…+n/2n+1的极限 lim(1+tan×)^1/x求极限 lim(1-x)^3/x 求极限~ matlab 求极限lim(1+1/2+1/3+1/4+……+1/n-lnn),n->无穷 当x趋向于无穷,求lim（1+1/2+1/4+…….+1/2^n）的极限 求极限lim(1/2n+3/4n+……+(2^n-1)/(2^n*n)) 大一求极限lim(n/(n2+1)+n/(n2+2^2)+……+n/(n2+n2))pi/4 求极限：lim{1+[1/(2n-1)]}^n 求极限：lim(1+1/x)(2-1/x²) 求极限 lim sin pi(n^2+1)^(1/2) 求极限 lim sin pi*(n^2+1)^(1/2) 求极限：lim(1-2x)^(1/x), lim arctan[1/(x^2-1)] 求左右极限 求极限lim(1-2/x+3/x^2)^x