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Let X ={1,2,3,4}Determine whether f:X ra...

Let X ={1,2,3,4}Determine whether f:`X rarr X`defined as given below have inverses. Find `f^(-1)` if it exist `f={(1,2),(2,2),(3,2),(4,2)}`

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`f` is not injective hence not invertible.
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