f【x-1】=2x+x+1

f(x)=x/(x^2+1) 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)=x(x-1)(x-2)(x-3)(x-4) f'(1)=? 已知函数f（x)=2x+1,x>=0;f(x)=|x|,x f(x-1)=x^2-2x+3(x f(x)=(x-1)(x-2).(x-3)求导 若f(x)=2f(1/x)=2x+1/x,求f(x) 已知2f(1/x)+f(x)=x(x不等于0),求f(x).