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If A X B = {(1, a), (1, b), (1, c), (2, a), (2, b), (2, c)} then find set A.(a) {1}(b) {1, 2}(c) {1, a}(d) {a, b, c}The question was posed to me in semester exam.This interesting question is from Cartesian Product of Sets topic in portion Relations and Functions of Mathematics – Class 11

Answer»

The correct option is (b) {1, 2}

EASY explanation: In each ordered pair of A X B, FIRST ELEMENT belongs to set A and second element belongs to set B.

1,2 ∈ A so, A = {1, 2}.



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