Teaching DSSSB PGT Mock Test 2025 Mathematics Relations and Functions Binary Operations

Let A = QXQ and let * be a binary operation on A defined by (a, b) * (c, d) = (ac, b + ad) for all (a, b), (c, d) belongs to A then find identity element in A.

1
(0, 1)
2
(0, 0)
3
(1, 1)
4
(1, 0)
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