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Let f :X rarr Y be an invertible functio...

Let `f :X rarr Y` be an invertible function . Show that f has unique inverse .
(Hint : Suppose `g_(1) and g_(2)` are two inverse of f. Then for all `y inY,(fog_1)(y) =I_(Y) (y) = (fog_(2))(y).` Use one - one ness of f).

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f has unique inverse .
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KUMAR PRAKASHAN-RELATIONS AND FUNCTIONS -EXERCISE 1.3
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