lim(1+3x)^2/x, x->0,求该极限

lim(1+3x)^2/x, x->0,求该极限 求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限 求极限lim(x-->0)x^2 sin(1/x), 求极限lim(1-2/x+3/x^2)^x 求极限lim(x~0)((e^x+e^2x+e^3x)/3)^1/x lim(x→0+)x^1/2×cotx^1/2求该函数极限 求lim(1-x/2)^2/x x趋近与0的极限 求lim(1-x)^1/3x x趋近与0的极限 求极限lim(x->0)(x+e^x)^2/x 求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1 lim*[ln(1+3X)]/sin4X {X->0}求极限 求极限 x 趋于0 lim(cosx)^1/(x^2) lim x->0(sqrt(sin(1/x^2)) 求极限