1.设函数 (x)=(e)^dfrac (1{x)}arctan dfrac (|x|)(x-1) 则下列结论 不正确 的是 () .-|||-(A)当 arrow +infty 时, y=f(x) 有渐近线 =dfrac (pi )(4) (B)当 arrow 0 时, y=f(x) 有渐近线 =-dfrac (pi )(4)-|||-(C)当 |xarrow (0)^+| 时, y=f(x) 有渐近线 x=0 (D)当 arrow (1)^- 时, y=f(x) 有渐近线 x=1

设函数 (x)=dfrac (1)({e)^dfrac (x{x-1)}-1} 则-|||-

设函数=dfrac ({x)^2}(x-1),则=dfrac ({x)^2}(x-1)=________.设函数,则=________.

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

((1+dfrac {1)(x))}^(x^2)-|||-.-|||-.arrow +infty e .x

1.设 (dfrac (1)(x))=x((dfrac {x)(x+1))}^2, 则 f(x)= ()-|||-(A) dfrac (1)(x)((dfrac

[题目]设函数 (x)=dfrac (1)(edfrac {x)(x-1)-1} 则 ()-|||-

7.设 =arctan dfrac (1)(x) ,则 dfrac ({d)^2y}(d{x)^2}(x)_(x=1)= __

1.设 (x)=dfrac (1)(1-{x)^2}, 求 (-x),f[ f(x)] ,f[ dfrac (1)(f(x))]

1.在 (-infty ,0) 上,下列函数中无界的函数是 ()-|||-(A) =(2)^x; (B) =arctan x; (C) =dfrac (1)({

设(X,Y)的分布函数为(x,y)=dfrac (1)({pi )^2}(dfrac (pi )(2)+arctan dfrac (x)(2))(dfrac (