求极限lim(x→1) (2-x)^[sec(πx/2)].
求极限:lim(x→0)ln(1+x²)/ (sec x- cos x)
lim(x→0)(ln(1+x^2)/(sec-cosx))
求极限lim x→π(sin3x)/(x-π)和求极限lim x→π/2(1+cosx)secx
lim (x→0) [(2x) / (1+x^2)]/sec x tan x+si
lim(x→+∞)(2/π*arctanx)^x求极限
求极限 lim x→π/2 (sin2x)^3 lim x→0 根号(1+x^2)-1/x
求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限
求极限lim(1-2/x+3/x^2)^x
求极限lim(x-->0)x^2 sin(1/x),
求极限lim{xln(1+2/x)}
lim (x→1) (x/2+x)^{1-x^(1/2)/1-x} 求极限~
1.4求极限lim(x→∞) (x^2+x)/ (x^4-3x^+1)