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If $a$ is an integer, $b$ is an integer and $c$ is irrational, which of the following are rational numbers?

1. $\dfrac{5}{6}$
2. $\dfrac{a}{3}$
3. $\dfrac{-2}{b}$
4. $\dfrac{1}{c}$
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1 Answer

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1. rational

2. rational

3. rational

4. irrational
by Diamond (39,701 points)

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