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Let * be the binary operation on the set...

Let * be the binary operation on the set {1,2,3,4,5}, defined by a *' b = H.C.F of a and b. Is the operation *' same as the operation * defined above? Justify your answer.

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MODERN PUBLICATION-RELATIONS AND FUNCTION-EXAMPLE
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  12. Let * be a binary operation defined on Q, the set of rational numbers,...

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