2.
2.
[题目] lim _(xarrow 1)dfrac (sqrt {3-x)-sqrt (1+x)}({x)^2+x-2}= __
lim _(xarrow 1)dfrac (sqrt {3-x)-sqrt (1+x)}({x)^2-1}-|||-__
lim _(xarrow 0)dfrac (sqrt {1+x)+sqrt (1-x)-2}(sqrt {1+{x)^2}-1}
lim _(xarrow 4)dfrac (sqrt {2x+1)-3}(sqrt {x-2)-sqrt (2)}=..
(7) lim _(xarrow infty )dfrac (sqrt {1+x)-1}(sqrt [3]{1+x)-1}
试求下列极限:-|||-lim _(xarrow 2)(sqrt (3-x)+ln dfrac (x)(2))dfrac (1)({sin )^2(x-2)}
(4) lim _(xarrow 1)dfrac ({x)^2-sqrt (x)}(sqrt {x)-1};
求极限 lim _(xarrow 0)dfrac ({x)^2((e)^x-1)}(sqrt {1+tan x)-sqrt (1+x)}
(21)lim _(xarrow 4)dfrac (sqrt {2x+1)-3}(sqrt {x-2)-sqrt (2)}(21)
lim _(xarrow 0)dfrac (sqrt {1+5x)-sqrt (1-3x)}({x)^2+2x}= . __