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let A =RR-{-(1)/(2)} and B=RR -{(1)/(2)}...

let `A =RR-{-(1)/(2)} and B=RR -{(1)/(2)}`. Prove that function `f: A rarr B` define by ,`f(x)=(x+2)/(2x+1)` is invertible and hence find `f^(-1) (x)`

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The correct Answer is:
`f^(-1)(x)=(x-2)/(1-2x)`
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