lim(x→0)(cosx)^4/x^2 怎么解

lim(x→0)(cosx)^[4/(x^2)] lim(x→0)(cosx)^4/x^2 怎么解 求lim(1-cosx)/x^2求lim(1-COSX)/X^2X→0 lim(x→0)(cosx-cos^2x)/x^2 lim(x→0)(cosx)^(1/ln(1+x^2)) lim x→0[ln(cosx)]/x^2 求Lim(x→0)(sinx/x)^(cosx/1-cosx) limx→0(cosx)^(1/x^2)求解lim(x→0)((cosx)^(1/x^2)) lim(x→0)(1/cosx)=? lim(x→0)[(secx)^2-1] /(1-cosx) lim x→0(1+2cosx)^secx 求极限lim[cosx-e^(-x^2/2)]/x^4 其中x趋向于0.我的做法为什么错了：lim[cosx-e^(-x^2/2)+1-1]/x^4=lim[cosx-1-e^(-x^2/2)+1]]/x^4=lim[-(1-cosx)-(e^(-x^2/2)-1)]]/x^4=lim-(1-cosx)/x^4-lim(e^(-x^2/2)-1)/x^4=lim-1/2x^2/x^4-lim-x^2/x^4=0就是 lim（x→0） 1-cosx/x＋x lim(x→0)(e^x-cosx)/x=1? lim(x→0) (e^x-cosx)/x lim(x-cosx)/x x→-∞ 已知lim(x→0) f(x)/(1-cosx) =2 求lim(x→0) [1+f(x)]^½ 求lim x→0 (tan2x-sinx)/x以及lim x→0 (cosx-cos3x)/x^2