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

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

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

2 , 1 B . 1 , 2 C . (x)=dfrac ({e)^x-1}(x), 1D . (x)=dfrac ({e)^x-1}(x), 2设函数，若当

lim _(xarrow 1)dfrac ({x)^2-1}(x-1)(e)^dfrac (1{x-1)}=

lim _(xarrow 1)(dfrac (a)(1-{x)^2}+dfrac (x)(x-1))=dfrac (3)(2) = __

直线dfrac (x-1)(1)=dfrac (y)(2)=dfrac (z+3)(-2)-|||-__ __-|||-__与平面dfrac (x-1)(1)=

当x→1时,函数dfrac ({x)^2-1}(x-1)(e)^dfrac (1{x-1)}的极限( ) (A)等于2 (B)等于0

设(x)=(x)^2 (x)=x-1,求复合函数(x)=(x)^2 (x)=x-1,____ .(x)=(x)^2 (x)=x-1,(x)=(x)^2 (x)=

5、已知随机变量X的密度函数为 (x)=dfrac (1)(2sqrt {2pi )}(e)^-dfrac ({(x-1)^2)(8)}, 则 =dfrac (