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Let A = R × R and * be the binary operation on A defined by (a, b) * (c, d) = (a + c, b + d). Show that * is commutative and associative. Find the identity element for * on A.

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ए = आर × आर और * ए (ए, बी) * (सी, डी) = (ए + सी, बी + डी) द्वारा परिभाषित ए पर बाइनरी ऑपरेशन हो। दिखाएँ कि * कम्यूटेटिव और सहयोगी है। ए पर * के लिए पहचान तत्व खोजें।

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