Given two rational numbers, a and b, what can be said about the product of a and b?
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It will also be a rational number...
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Let p = a/b and q = c/d be two rational numbers, where a, b, c, d are integers. ... Since integers are closed under addition and multiplication, the numerator and denominator will both be integers. Hence, the sum of two rational numbers is a rational number. We can also say that rational numbers are closed under addition.
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