Let * be the binary operation on the rational number given by a*b=a+b+2ab. which of the following are true? i. * is commutative ii. there is a rational number that is an identity with * operation iii. every rational numebr has an inverse with * operation
I know that i is true and iii is false but why is ii false? Ans: (i) is only true
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hi, but according to this post
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