2.描绘下列函数的图形.-|||-(1) =dfrac (1)(5)((x)^4-6(x)^2+8x+7) ;-|||-(2) =dfrac (x)(1+{x)^2} ;-|||-(3) =(e)^-((x-1)^2) ;-|||-(4) =(x)^2+dfrac (1)(x) ;-|||-(5) '=dfrac (cos x)(cos 2x)

=dfrac (1)(5)((x)^4-6(x)^2+8x+7); 描绘下列函数的图形: (1). ;

讨论下列函数的有界性：(1) (x)=dfrac (x)(1+{x)^2}-|||-(2) (x)=dfrac (1+{x)^2}(1+{x)^4}讨论下列函数

2.求下列函数的导数:-|||-(1) =(x)^3+dfrac (7)({x)^4}-dfrac (2)(x)+12 ;-|||-(2) =5(x)^3-(2

dfrac (1)(5)(X)_(1)+dfrac (2)(5)(X)_(2)+dfrac (2)(5)(X)_(3)-|||-D .dfrac (1)(7)(

int dfrac ({x)^3}({(1+{x)^2)}^2}dx=A.int dfrac ({x)^3}({(1+{x)^2)}^2}dx=B.int df

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

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

设函数 (x)=(e)^dfrac (1{x-1)}dfrac (ln |x+2|)({x)^2+x-6}求(x)=(e)^dfrac (1{x-1)}dfra

(9) int dfrac (x{e)^arctan x}({(1+{x)^2)}^dfrac (3{2)}}dx ;

8 单选 lim _(xarrow {0)^x}dfrac (1+{2)^dfrac (1{x)}}(1-{2)^dfrac (1{x)}}=