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Which of the following is equal to A∪A’?(a) U(b) A(c) A’(d) U’This question was posed to me in an interview.Origin of the question is Complement of a Set in division Sets of Mathematics – Class 11

Answer»

Right CHOICE is (a) U

The best I can explain: In the Venn DIAGRAM, region a denotes A and region b denotes A’. Region a and b together form UNIVERSAL set so, A∪A’=U.



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