44.设 (x)=f(x)(dfrac (1)({2)^x+1}-dfrac (1)(2)), 已知f(x)为奇函数,判断F(x)的奇偶性.

7.设f(x)为奇函数，判断f(x)((1)/(2^x)+1-(1)/(2))的奇偶性____.7.设f(x)为奇函数，判断$f(x)(\frac{1}{2^{

设(x)+(x)^2f(dfrac (1)(x))=dfrac ({x)^2+2x}(x+1) 求f(x)设

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

2 基础出 已知 (x)=dfrac (x-1)(x+1) ,求 f(-2) ,f[f(x)].

(3)函数f(x)=ln(sqrt(1+x^2)-x)的奇偶性为____；(3)函数$f(x)=ln(\sqrt{1+x^{2}}-x)$的奇偶性为____；

4.判别下列函数的奇偶性:-|||-(1) =ln (x+sqrt ({x)^2+1})-|||-(2) =F(x)(dfrac (1)({a)^x-1}+df

函数f（x）=x+(1)/(x)的奇偶性是 ____ ．函数f（x）=x+$\frac{1}{x}$的奇偶性是 ____ ．

[题目]已知f(x),g(x)都是定义在R上的函数,f(x)-|||-为奇函数,g(x)为偶函数,判断-|||-f(x)·g(x),f(g(x),g(f(x))

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

2.设函数 (x)=dfrac (1)(x) ,则 f[ f(x)] =