Find inverse of f(x) + x-2/x+1
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Let y=F(x), y=(x-2)/(x+1); y(x+1)=x-2; x-xy=y+2; x(1-y)=y+2; x=(y+2)/(1-y) or f(y)=(y+2)/(1-y). F(x) is not defined for x=-1; f(y) is not defined for y=1.

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