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Let ** be a binary operation on set QQ-{...

Let `**` be a binary operation on set `QQ-{1}` defined by `a**b=a+b-abinQQ-{1}.` e is the identity element with respect to `**` on `QQ`. Every element of `QQ-{1}` is invertible, then value of `e` and inverse of an element `a` are---

A

0

B

1

C

`(a)/(a-1)`

D

`(a)/(a+1)`

Text Solution

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The correct Answer is:
A,C
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