f (1+1/x )=1+1/x 2+1的解析式
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f (1+1/x )=1+1/x 2+1的解析式
f (1+1/x )=1+1/x 2+1的解析式
f (1+1/x )=1+1/x 2+1的解析式
设1+1/x =A ,x=1/(A-1)
f(A)=1+1/[1/(A-1)²]+1
=2+1/(A-1)²
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