f(x-1/x)=x^2+1/x^2求f(x)
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f(x-1/x)=x^2+1/x^2求f(x)f(x-1/x)=x^2+1/x^2求f(x)f(x-1/x)=x^2+1/x^2求f(x)设t=x-1/x则x=1/1-tf(t)=(1/1-t)^2+
f(x-1/x)=x^2+1/x^2求f(x)
f(x-1/x)=x^2+1/x^2
求f(x)
f(x-1/x)=x^2+1/x^2求f(x)
设t=x-1/x
则x=1/1-t
f(t)=(1/1-t)^2+1/(1/1-t)^2
=1/(1-t)^2+(1-t)^2
所以
f(x)+1/(1-x)^2+(1-x)^2
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