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Question

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.
(iii) On R, defined by ab=ab2

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Solution

On R, defined by ab=ab2
It is seen that for each a,bR, there is a unique element ab2 in R.
This means that carries each pair (a,b) to a unique element ab=ab2 in R. Therefore, is binary operation.


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