f(x)=x^2+1/x^2
f(x)=x/(x^2+1)
为什么f(x)满足f(x+1)=1/f(x)可以得出f(x+2)=f(x)
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f(x)=ln(1+x)-[2x/(x+2)] 请问f(x)的导数f ’(x)是多少
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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)
若3f(x-1)+2f(1-x)=2x,求f(x)