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a*b=a+2b for all a,b belongs to Q...binary operation is not commutative.prove that... |
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Answer» For commuative a * b = b* a ,let take a = 5 and b = -6a * b = 5 + 2 × (-6) = 5 -12 = -7b* a = -6 + 2×(5) = -6 + 10 = 4So, a * b is not equal to b* a, so not commuative. |
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