lim(x→3) x^2-4x+3/sin(x-3) 的极限如何求出

求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1 当x趋向π lim (sin 3x )/( sin 2x) 的极限为? 求x→0时lim[e^x-e^(-x)-2x]/sin^3x的极限 lim(x→∞)(x^2+x)/(x^4-3x-1)的极限 求x→0时lim(x-arcsinx)/(sin^3)x的极限 求极限,lim x→0 sin(x-2)÷x平方-4 lim x→正无穷(1+1÷3x) limx→... 求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限 求极限 1,lim(x→∞）（sinx/x +100) 2,lim(x→∞）xtan1/x 3,lim(x→1）sin^ 求lim(x^2+2x)/(x^3-3x+2),x→无穷的极限 lim x→0 (x^2+2x-1)/(x^3-2x)的极限是多少 求极限lim(x-->0) (tanX-sinX)/[(sin^3)X] 求极限lim(x→2)(x^2-3x+2)/(x^2+4x-12)