lim[x→0]√(1+sinx^2)-secx/x^2In(1+x^2)

lim[ln(1+x^2)]/(secx-cosx) x->0 lim(x趋于0时)secx - 1/x^2 , lim(x→0)(1-x^2-e^-x)/sinx 求极限lim x→π(sin3x)/(x-π)和求极限lim x→π/2(1+cosx)secx 1、lim ln(1+x+2x^2)+ln(1-x+x^2)/secx-cosx 求 lim ln(1+x+2x^2)+ln(1-x+x^2)/secx-cosx lim(x→0)(1+sinx)^(1/2x) lim(x+e^2x)^(1/sinx) lim(x→∞)[sinx/x+xsin(1/2x)] 求下列极限：1)lim√(x)lnx (x->0+); 2)lim(sinx/x)^1/x (x->0+) 求lim(x→0)ln[1+e^x(sinx)^2]/√(1+x^2)-1 求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1