O = {x|x∈ N and x is odd}

Answer 1

O is the set of all odd natural numbers. The natural numbers are the counting numbers (1, 2, 3, 4, ...) and do not include negative numbers or fractions. An odd number is a natural number that is not divisible by 2. So, the set O would consist of all natural numbers that are odd, such as 1, 3, 5, 7, 9, etc.

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