求lim(x^2+2x)/(x^3-3x+2),x→无穷的极限

求lim(x趋于3)x^2-8/x-3 求极限lim(1-2/x+3/x^2)^x 求极限lim(x+3)(2+cosx)/(x^2+x) 求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限 求lim(x^2+2x)/(x^3-3x+2),x→无穷的极限 求极限lim(x→2)(x^2-3x+2)/(x^2+4x-12) 求极限,lim(x趋向于1)(x^2-2x+1)/(x^3-x) 求lim√(3-x)-√(1+x)/(x^2+x-2) (x->1) 求极限lim(x￫∞)(√(x^2+x )-√(x^2-3x )). 求极限x->0lim(tg^2(2x)/x^3)(1-x/(e^x-1)) 求lim√(3-x)-√(1+x)/(x^2+x-2) (x->1) 求极限 lim [(3+x)/(6+x)]^[(x-1)/2]= x→∞求极限 lim [(3+x)/(6+x)]^[(x-1)/2]=x→∞ 设lim（x→0）[f(x)-3]/x^2=100,求lim(x→0)f(x) lim(x->无穷大){(2^x-3^x)/2}^(1/x) lim(x->0)((2-x)/(3-x))^1/x ( x+3) lim (------------)的x次方 x->∞ ( x-2) 求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1 求极限,分母为零.lim x to -1 (x^2-4x)/(x^2-3x-4)lim x to 1 (x^3-1)/(x^2-1)