3f(x)+f(1/x)＝5x求f(x)

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)? 已知f(x)满足2f(x)+f(-x)=-3x+1,求f(x) (1) f(x)=X²+3x 求（X+1）与f[f(x)] 已知f(x+1)+2f(-x)=3x²+x,求f(x) ,已知5f(x)+3f(1/3)=2x+1.求f(x) 设函数f(x)满足f(x)+2f(1/x)=x,求f(x) 已知二次函数f(x)满足f(3x+1)=9x^2-6x+5,求f(x) F(1)=5,F(x)*F(x+2)=13,求F(x) f(x)=sin60度X,求f(1)+f(2)+f(3)+.f(2010) F(x)=3x^2+2x-1 求F(x+△x)-f(x)/ △x