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Let `A=Q x Q` and let * be a binary operation on A defined by `(a , b)*(c , d)=(a c , b+a d)` for `(a , b),(c , d) in Adot` Then, with respect to * on A Find the identity element in A Find the invertible elements of A.

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चलो `A=Q x Q` और * द्वारा परिभाषित एक बाइनरी ऑपरेशन हो `(a , b)*(c , d)=(a c , b+a d)` के लिये `(a , b),(c , d) in Adot` फिर, ए पर * के संबंध में ए में पहचान तत्व खोजें ए के अचूक तत्व खोजें।

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