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1.设函数 (x)=dfrac (1)(x) ,g(x)=1-x 则 [ g(x)] = ()-|||-① https:/img.zuoyebang.cc/zy

设函数f(x)=(1)/(x)，g(x)=1-x，则f[g(x)]=A. 1-$\frac{1}{x}$B. 1+$\frac{1}{x}$C. $\frac{

9.设函数 (x)=dfrac (1)(x) , (x)=1-x, 则 [ g(x)] = __-|||-

[题目]-|||-6.设函数 (dfrac (1-x)(1+x))=x 则 f(x)= __

设f(x)=(x)/(1-x)，g(x)=(x)/(1+x)，求复合函数f[f(x)]，f[g(x)]，g[f(x)]，g[g(x)].设$f(x)=\frac

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设函数f（x）=(1-x)/(1+x)，则f[f（x）]= ____ ．设函数f（x）=$\frac{1-x}{1+x}$，则f[f（x）]= ____ ．

设(x)=dfrac (1-x)(1+x), 则(x)=dfrac (1-x)(1+x)设,则

设 函数 f ( x ) 在 x = 1 处可导且lim _(xarrow 0)dfrac (f(1)-f(1-x))(2x)=1则 lim _(xarrow

设(x)=dfrac (1)(1-x), 求(x)=dfrac (1)(1-x)和(x)=dfrac (1)(1-x)设, 求和