求极限lim _(xarrow 0)dfrac ({e)^(x^2)-(e)^2-2cos x}({x)^4}

求极限：（1）lim _(xarrow 0)dfrac ({e)^2x-2(e)^x+1}({x)^2cos x}；（2）lim _(xarrow 0)dfra

(12)[2012，三]求极限lim_(xto0)(e^x^(2)-e^2-2cos x)/(x^4).(12)[2012，三]求极限$\lim_{x\to0}

2.求下列极限:-|||-(1) lim _(xarrow 4)dfrac ({x)^4-256}(x-4);-|||-(2) lim _(xarrow 0)d

求下列极限:-|||-lim _(xarrow 0)(x)^2(e)^dfrac (1{{x)^2}}

应用泰勒公式求下列极限:-|||-lim _(xarrow 0)dfrac ({e)^x+(e)^-x-2cos x-2(x)^2}({x)^6}-|||-__

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

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

极限lim _(xarrow 0)dfrac ({int )_(0)^(x^2)(e)^tdt}(2x)=()A、 lim _(xarrow 0)dfrac (

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

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