lim(x->0)(1-2/x+2)怎样计算极限

lim(x->0)(1-2/x+2)怎样计算极限 lim(1-x)^(2/x) x->0 lim(x->0)((2-x)/(3-x))^1/x lim(x→0)e^x-x-1/x^2 X趋于0 Lim(xlnx)=Lim(lnx/(1/x))=Lim(1/x/(-1/x^2))=Lim(-x)=0Lim(lnx/(1/x))=Lim(1/x/(-1/x^2))其中这步使怎么转化的? (1) lim(x->正无穷) x-lnx (2) lim(x->0+) cosx^1/x^2 1.lim x->∞ （2x/x^2+1)*cosx 2..lim x->∞{ [(x^2-x)arctanx]/x^3-x-5}3..lim x->0 （e^x-e^-x-2x)/(x-sinx) 4..lim x->0 (sinx-x)/(x^3) 5..lim x->0 (x^2*tanx)/(x-tanx) 6..lim x->0 (1+3/x)^2x 7..lim x->0 (1+2x)^(3/sinx) 8.lim x->∞ (x/1+x)^(x-3) 9..li 怎样求lim tanx-x/x^2(e^x-1)当x趋于0时的极限? lim(x^2+1)/(2x^+1) x趋向0 lim(x->0) (x+1)^1/2-1 /x 帮求下x->0,lim[(1-x)/2]^[(1/x)+1], lim(x->0)ln(1+2x)/e^x-1 lim(x→0)(1-2x)^1/x 极限? lim x趋向0 (1+cos^2(1/x))^x lim 2（1+x）^1/x x→0 lim x趋近于0 ((1+2^x)/)^(1/x) lim[(1-e^(-x))^1/2]/x x趋于0 lim(1-2x)^1/x x趋向于0