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How will you define a set of all real numbers?(a) {x: -1 < x < 1}(b) [x: -∞ < x < ∞](c) {x: -∞ < x < ∞}(d) {x: -Z < x < +Z}I got this question in unit test.This intriguing question originated from Sets and their Representations topic in portion Sets of Mathematics – Class 11

Answer»

Correct answer is (c) {x: -∞ < x < ∞}

Easy explanation: All the numbers whether it is an integer or RATIONAL number or IRRATIONAL number is defined as REAL Number. The RANGE of the real number LIES between in the range (-∞, +∞).



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