为什么lim(x→0) [1-x^2-e^(-x^2)]/[xsin^3(2x)] =lim(

lim(x→∞)[sinx/x+xsin(1/2x)] 求极限lim{[(sinx)/x]+xsin(1/2x)} lim(sinx/x+xsin(1/x)) = 求当x趋于0时lim (1+x)^1/2-(1+x)^1/3/x;lim(xsin(1/x)+(1/x)sinx0的极限 lim(x→0)(1-x^2-e^-x)/sinx lim x→0[∫上x下0 cos(t^2)dt]/x ; lim x→0[∫上x下0 ln(1+t)dt]/(xsin 求极限lim(x→0){(2x-sin2x)/xsin^2x} lim x趋于无穷,xsin(2x/1+x^2)= 求极限lim(x~0)((e^x+e^2x+e^3x)/3)^1/x lim(x+e^2x)^(1/sinx) lim(x->0)ln(1+2x)/e^x-1 lim[(1-e^(-x))^1/2]/x x趋于0