若f(x)满足f(x)+2f(1/x)=5x 求f(4)的值f(x)为二次函数 若3f(x+1)-2f(x-1)=4x^2-6x 求f(x)的解析式

若f(x)满足f(x)-2f(1/x)=x,则f(x)=? 若F(x)满足f(x)+2f(1/x)=x,则f(x)= 若一次函数f(x) 满足f[f（x)]=1+2x 求f(x) f(x)满足:2f(x)-f(1/x)=x+1,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(1/x)=3x,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(-x)=-3x+1,求f(x) 已知f(x)满足f(x)+2f(1/x)=3x,求f(x) , 若函数f(x)满足f(x)+2f(1/x)=5x+4/x,则f(x)= 若一次函数f(x)满足f[f(x)]=1+4x,求f(x) f(x)满足f(-x)+2f(x)=x+3,则f(1)等于 若f(x)满足3f(x-1)+2f(1-x)=2x,则f(x)=? 若函数f(x)满足关系式f(x) 2f(1/x)=3x,则f(x)= 若f(x)满足f(x)+2f(1/x)=3x,则f（x）=? 若f(x)满足f(x)－2f(1/x)=x,求f(x)=? (1)若f(x)满足2f(x)+f(1/x)=3x,求f(x).