求lim _(xarrow 1)(dfrac (3)(1-{x)^3}-dfrac (1)(1-x))=()lim _(xarrow 1)(dfrac (3)(1-{x)^3}-dfrac (1)(1-x))=()

lim _(xarrow 1)(dfrac (1)(1-x)-dfrac (3)(1-{x)^3})-|||-__ __;;

lim _(xarrow 1)(dfrac (3)(1-{x)^3}-dfrac (1)(1-x))-|||-__。。

lim _(xarrow 1)(dfrac (1)(1-x)-dfrac (3)(1-{x)^3})=-|||-_______._____.

求极限：lim _(xarrow 1)(dfrac (1)(1-x)-dfrac (3)(1-{x)^3})-|||-__ __.求极限：.

(4) lim _(xarrow 1)(dfrac (1)(1-x)-dfrac (3)(1-{x)^3});

求下列极限：lim _(xarrow 1)(dfrac (3)(1-{x)^3}-dfrac (1)(1-x))-|||-__求下列极限：

14 lim _(xarrow 1)(dfrac (1)(1-x)-dfrac (3)(1-{x)^3}) 一

lim _(xarrow 1)dfrac (1-{x)^3}(1-x)

lim _(xarrow 1)(dfrac (a)(1-{x)^2}+dfrac (x)(x-1))=dfrac (3)(2) = __

1.计算下列极限:-|||-(14) lim _(xarrow 1)(dfrac (1)(1-x)-dfrac (3)(1-{x)^3}) -