f(x)=|2x+1|-|2x-1|
f(x)=x/(x^2+1)
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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)
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f(x)=x(x-1)(x-2)(x-3)(x-4) f'(1)=?
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已知2f(1/x)+f(x)=x(x不等于0),求f(x).