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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={(1,3)(2,1),(3,1),(4,2)}`

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f(2)=f(3) =1
`implies` f is not injective
`:.` f is not invertible.
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