求怎样解极限lim(x→1)[(3/1-x三次方)-(1/1-x)]

求怎样解极限lim(x→1)[(3/1-x三次方)-(1/1-x)] lim(1-x)^3/x 求极限~ 求极限lim x→∞ (x/(1+x))^x 求极限lim Ln(1+x) /x > .< x→0 求极限lim(1-2/x+3/x^2)^x 求极限 lim [(3+x)/(6+x)]^[(x-1)/2]= x→∞求极限 lim [(3+x)/(6+x)]^[(x-1)/2]=x→∞ 求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限 求极限lim(x→∞)(2x/3-x)-(2/3x)求极限lim(x→5)根号(x-1)-2/x-5 lim (1-1/3x)^x x→∞ 求极限lim(1+1/x)^x=e 求极限lim(x→0)x²/1-cosx 求极限：lim(x→+∞)[ln(x+1)-lnx] 求极限lim(x→0) cos(1/x) 求lim(1-cos2x)/x^2极限,x→0 求极限lim(x→0)(cosx-(1/x)) 求极限lim x→0 (1/xsinx+xsin1/x) 求极限lim(x→0) (1-sinx)^(2/x) lim x→∞ xsin(1/x)求极限 求极限 lim(x→0)(1-sinx)^(2/x)