3f(x)+2f(-X)=2x+2,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)
已知f (x)+2f(-x)=x^3+x^2,求f(x)
已知f(x+1)+2f(-x)=3x²+x,求f(x)
设函数f(x)满足f(x)+2f(1/x)=x,求f(x)
一直f(x)为二次函数,且f(x)+2f(-x)=3x²-x,求f(x)
f(x+2)>=f(x)+2,f(x+3)
f(X)=f(X+2)(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