f(x)=1/(3√x^2+2x+1)+(3√x^2-1)+(3√x^2-2x+1),求f(1)+f(3)+……+f(9
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)
已知f(x+1)+2f(-x)=3x²+x,求f(x)
F(x)=3x^2+2x-1 求F(x+△x)-f(x)/ △x
f(x)值域 [ 3/8,4/9] y=f(x)+√1-2f(x)
f[(3x+2)/2x-1]=x^2-1,求:f(1),f(x)
f(x+1)=2x平方-3x+1,求f(-1),f(x-1)
若3f(x-1)+2f(1-x)=2x,求f(x)
3f(x-1)+2f(1-x)=2x 求 f(x)
若f(x^2)=3x^2-1,求f(x),f(x-1)