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Ex 1.5, 3 - Chapter 1 Class 11 Sets - Part 7

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Ex 1.5, 3 Taking the set of natural numbers as the universal set, write down the complements of the following sets: (vii) {x: x is perfect cube} Universal set is the set of natural numbers {x: x is a perfect cube}´ = {x: x ∈ N and x is not a perfect cube} Perfect cube Eg: 1, 8, 27, 64,.. Not a perfect cube Eg: 2, 3, 4, 5, 6, 7, 9, 10, 11,… Perfect cube : Numbers like 13 , 23 , 33, 43, … i.e. 1, 8, 27, 64,…

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