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已知f(x)满足2f(x)+f(1/x)=3x,求f(x)?
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4、设f(x)满足关系式f(x)+2f(1/x)=3x求函数的解析式
设f(x)满足f(x)+f(x-1/x)=x求f(x)的解析式
二次函数f(x)满足f(x+1)+f(x-1)=2x^2+4x,求f(x)
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一次函数f(x)满足f [f(x)] =1+2x,求f(x)