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Write the following in set-builder form:-i) Set of all positive integers whose cube is odd ii) Set of all real numbers which cannot be written as the

quotient of two integer


I) {x : x is a positive integer,  x^{3} is odd}
ii) {x : x is an irrational number}

However, there are many ways in which a set can be expressed in the set-builder form. These are just two of them.
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