lim(x趋向0）(1+X)/(2X+X^2)=?

lim（x趋向于0）（1-cosx)/x^2 lim(x^2+1)/(2x^+1) x趋向0 lim x趋向0 (1+cos^2(1/x))^x lim(1-2x)^1/x x趋向于0 lim(x趋向0)ln(1+sin x)/x^2 lim(x趋向于0)(x*cotx-1)/(x^2) lim（x/（1+x^2））,x趋向无穷大 Lim (1+x)(1+2x)(1+3x)-1除以x （x趋向0） lim(x趋向0）(e^x-x^-x)/x lim（x-3/x+1）^x lim趋向无穷大 lim(1/（x^2-x)）*sin(π/x）x趋向于0请详解 lim(x趋向0）(1+X)/(2X+X^2)=? lim(x趋向0）(e^x-e^-x)/x 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) 求下列极限 lim（x趋向2）x-2/根号3x-2.和lim（x趋向0）根号1+x^2-1/x 1.x趋向0 lim (cosx-1)/x 2.x趋向0 lim sinx/x lim(x趋向0+)x/[(1-cosx)^(1/2)] 求极限lim【1-cosmx)/x^2】,x趋向0