lim x(x+2)/x^2 (x→oo)

lim x(x+2)/x^2 (x→oo) 几道求极限的高数题,lim1/x(tanπx/(2x+1)) x→∞lim x(x^x-1)x→0+lim(x^x^x- lim(x→∞)[(a x^2)/x+1]+bx=lim(x→∞)(a x^2)+bx(x+1) / x+1=lim(x lim(x→0)ln(1-2x)/x lim(x→0)(1-x^2-e^-x)/sinx 极限lim(x→0)(1-2/x)^x 求lim(x→0)[(x^2sin1/x)/sinx] lim(x→∞)[sinx/x+xsin(1/2x)] lim (arcsinx/x)^{[cot(x)]^2} x→0 求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限 lim(x^2+1/x^2-2x)^x=? 求极限lim(x->0)(x+e^x)^2/x