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State with reason whether the following ...

State with reason whether the following functions have inverse
g : {5, 6, 7, 8} `rarr` {1, 2, 3, 4} with
g = {(5, 4), (6, 3), (7, 4), (8, 2)}

Text Solution

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5 and 7 have the same image 4, so g is not one-one and hense no inverse
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