lim x→0 (x^2+2x-1)/(x^3-2x)的极限是多少

lim(x→0)e^x-x-1/x^2 lim(1-x)^(2/x) x->0 lim(x→0)(1-2x)^1/x 极限? lim 2（1+x）^1/x x→0 极限lim(x→0)(1-2/x)^x lim(x→0) (e^(-1/x^2))/x^100 lim(x→0)(2-e^x)^(1/x) lim(x→0)2x^3-x+1 lim(x→0)(a^2x-1)/4x 求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限 lim(x→0)[e^x-e^(2x)]/x Lim [x^2/(x^2-1)]^x (x→∞) lim x→1 x-1/x^2-x lim(1+x/x)2x (x→∞) lim(x->0)((2-x)/(3-x))^1/x 求lim(1-cosx)/x^2求lim(1-COSX)/X^2X→0 当x→0时,lim[ln(1+2x)+xf(x)]/x^2=2,求lim[2+f(x)]/x为什么这样解是错的?lim[ln(1+2x)]/x^2+limf(x)/x=lim2x/x^2+limf(x)/x=lim[2+f(x)]/x=2不是有lim[f(x)+g(x)]=limf(x)+limg(x)吗? 当x→0时,lim[ln(1+2x)+xf(x)]/x^2=2,求lim[2+f(x)]/x 为什么这样解是错的?lim[ln(1+2x)]/x^2+limf(x)/x=lim2x/x^2+limf(x)/x=lim[2+f(x)]/x=2不是有lim[f(x)+g(x)]=limf(x)+limg(x)吗?