f(x)=x^2+x (x

f(X)=f(X+2)(x f(x)=x/(x^2+1) 函数f(x)=x-2 (x f(x)=x^2x 求导 x-2 ,X>=0 f(x)=f[f(x+5)],x分段函数f(x)= x-2 ,X>=0 f[f(x+5)],x f(x)=｛x^2+x(x≤0),-x^2+x(x＞0) F(X)满足F(x)+2f(x分之1)=3X,求f(x) 已知f(x)满足2f(x)+f(1/x)=3x,求f(x) 已知f(x)满足2f(x)+f(1/x)=3x,求f(x)? 设函数f(x)满足f(x)+2f(1/x)=x,求f(x) 已知f(x)满足2f(x)+f(-x)=-3x+1,求f(x) f(x+2)>=f(x)+2,f(x+3)