(vii)Since, ‘*’ on Q defined by a * b = (a – 1)/ (b + 1) for all a, b ∈ Q
If a = 2 and b = -1 in Q,
For a = 2 and b = -1
a * b does not belongs to Q
So, * is not a binary operation in Q.
(vii)Since, ‘*’ on Q defined by a * b = (a – 1)/ (b + 1) for all a, b ∈ Q
If a = 2 and b = -1 in Q,
For a = 2 and b = -1
a * b does not belongs to Q
So, * is not a binary operation in Q.