求lim(x->0)[1-(1-x^2)^1/2]/(e^x-cosx)极限

求lim(1-cosx)/x^2求lim(1-COSX)/X^2X→0 求极限lim(x-->0)x^2 sin(1/x), lim(1+2x)^1/x求极限（lim下是x~0) 求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限 lim(1-x)^(2/x) x->0 求极限lim【1-cosmx)/x^2】,x趋向0 求lim x趋向于0(arctanx)/(x^2+1) lim x->0(sqrt(sin(1/x^2)) 求极限 lim 1/2x x-->0 求极限 求lim(1-cos2x)/x^2极限,x→0 求极限lim(x→0) (1-sinx)^(2/x) 求极限 lim(x→0)(1-sinx)^(2/x) 求lim (sec^2 x求极限lim (sec^2 x - 1 )/(1-cos x) X-0请写出过程, f(x)={x x=1}求lim x趋向于1- f(x) lim x趋向于1+ f(x) lim趋向于1 f(x)f(x)={2x-1 x0} 求lim x趋向于0- f(x) lim x趋向于0+ f(x) lim趋向于0 f(x) 求极限 lim sin(x^2 * sin (1/x))/x x->0求极限 lim sin(x^2 * sin (1/x))/x x->0 求极限 x趋近于0 lim[(4^x-5^x)/2]^1/x求极限 x趋近于0 lim[(4^x-5^x)/2]^1/x 求极限x->0lim(tg^2(2x)/x^3)(1-x/(e^x-1)) 求极限 lim x->0 1-cosx / 2x^2lim x->0 1-cosx / 2x^2