Question

68. Let A = Qx Q and let * be a binary operation
on A defined by (a, b) * (s, d) = (ac, b + ad)
for (a, b), (c,d) E A. Determine, whether *
is commutative and associative. Then, with
respect to * on A
(i) Find the identity element in A.
(ii) Find the invertible elements of A.
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Answer 1

Answer:

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Step-by-step explanation:

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