极限 
（ ）
A.-2
B.0
C.2
D.1
极限 （ ）
A.-2
B.0
C.2
D.1
求极限lim _(xarrow 0)dfrac (x)(sqrt {1-x)-1}= ()lim _(xarrow 0)dfrac (x)(sqrt {1-x)
求极限lim _(xarrow 1)dfrac (sqrt {2x-1)-1}({x)^2-1}求极限
计算下列极限:-|||-lim _(xarrow 1)(dfrac (2)({x)^2-1}-dfrac (1)(x-1)).
求极限：lim _(xarrow 1)(dfrac (1)(1-x)-dfrac (3)(1-{x)^3})-|||-__ __.求极限：.
lim _(xarrow 1)(dfrac (2)({x)^2-1}-dfrac (1)(x-1)) ;
2.求下列极限：4) lim _(xarrow 1)(dfrac (1)(x-1)-dfrac (2)({x)^2-1});2.求下列极限：
求下列极限：lim _(xarrow 1)(dfrac (3)(1-{x)^3}-dfrac (1)(1-x))-|||-__求下列极限：
1.计算下列极限:-|||-(4) lim _(xarrow 1)(dfrac (2)({x)^2-1}-dfrac (1)(x-1)).
9.求下列函数的极限-|||-(1) lim _(xarrow -1)dfrac ({x)^3-1}(x-1);-|||-(3) lim _(xarrow in
9.求下列函数的极限-|||-(1) lim _(xarrow -1)dfrac ({x)^3-1}(x-1) =-|||-(3) lim _(xarrow i