1.

In the given sets, working operations ** is defined, check whether ** is binary or not ? Justify your answer. (i) In Z^(+), a**b=a-b (ii) In Z^(+), a**b=ab (iii) In R, a**b=ab^(2) (iv) In Z^(+), a**b=|a-b| (v) In Z^(+), a*b=a (vi) In Z^(+), a**b=a-3b

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ANSWER :(II),(iii),(IV),(v) are BINARY


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