(2) =sin 2xcdot (e)^x ;-|||-(3) =xcos x; ...-|||-(4) =dfrac (1)(1-{x)^2} ;-|||-(5) =(x)^2(e)^x ;-|||-(6) =cos xln x ;-|||-(7) =xln x ;-|||-(8) =dfrac ({e)^x}(x) ,-|||-(9) =(e)^-xcdot sin x ; .-|||-(10) =(e)^2x-1 -

12.求下列函数的导数:-|||-(1) =(e)^-x((x)^2-2x+3) ;-|||-(2) =(sin )^2xcdot sin ((x)^2) ;-

求下列函数的二阶导数:-|||-(1) =(cos )^2xcdot ln x;-|||-(2) =dfrac (x)(sqrt {1-{x)^2}}

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

2.lim _(xarrow 0)(dfrac (2+{e)^dfrac (1{x)}}(1+{e)^dfrac (4{x)}}+dfrac (sin x)(|

=(e)^2x-|||-2. =(e)^-(x^2)-|||-3. =dfrac ({e)^x}(1+x)-|||-4. =dfrac (sqrt {(x+1)

int (x)^3(e)^-(x^2)dx=(,,,,,)A、dfrac(1)(2)(e)^-(x^2)((x)^2+1)+CB、-dfrac(1)(2)(e)

曲线=dfrac (x)(1-{x)^2}的渐近线是（ ）.=dfrac (x)(1-{x)^2}和=dfrac (x)(1-{x)^2}=dfr

(B.) y = (1)/(2)x^2e^2x + sin 2x. (C.) y = (x)/(2)(x + 4)e^3x. (D.) y = (x^2co

lim _(xarrow 0)dfrac (sin x-xcos x)({x)^2ln (1+2x)}= ()_________________________

已知(x)=dfrac (xcos x)(1+{x)^4}+(x)^2-(int )_(-1)^1f(x)dx,则(x)=dfrac (xcos x)(1+{x