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प्रश्न
Determine whether or not each of the definition of given below gives a binary operation. In the event that * is not a binary operation, give justification for this.
On Z+, define * by a * b = a
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उत्तर
On Z+, * is defined by a * b = a.
* carries each pair (a, b) to a unique element a * b = a in Z+.
Therefore, * is a binary operation.
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