求极限lim _(xarrow 0)dfrac (sin 2x)({e)^2x-1}.

求极限lim _(xarrow 0)(dfrac (1)({sin )^2x}-dfrac ({cos )^2x}({x)^2})= ()求极限

0°.求下列极限.-|||-(4) lim _(xarrow 0)(dfrac (1)({sin )^2x}-dfrac ({cos )^2x}({x)^2})

求极限：lim _(xarrow 0)dfrac (1-{x)^2-(e)^-(x^2)}(x{sin )^3(2x)} 求极限：

1.求下列极限:-|||-(1) lim _(xarrow 0)dfrac (sin 2x)(x);-|||-(3) lim _(xarrow dfrac {p

求lim _(xarrow 0)(dfrac (1)({sin )^2x}-dfrac (1)({x)^2}).求.

求极限；（3）lim _(xarrow 0)dfrac (sin 2x)(sin 5x)；求极限；（3）；

求极限lim _(xarrow 0)((x+{e)^x)}^dfrac (1{2x)}求极限

[题目]求 lim _(xarrow 0)(dfrac (1)({sin )^2x}-dfrac ({cos )^2x}({x)^2})

[题目]求 lim _(xarrow 0)(dfrac (1)({sin )^2x}-dfrac ({cos )^2x}({x)^2})

求极限lim _(xarrow infty )dfrac (1+2{e)^x}(1-3{e)^2x}-|||-__-|||-lim _(xarrow {0)^+