The reciprocal of any rational number

Question:

The reciprocal of any rational number $\frac{p}{q}$, where $p$ and $q$ are integers and $q \neq 0$ is

(a) $\frac{p}{q}$

(b)1

(c)0

(d) $\frac{q}{p}$

Solution:

(d) The reciprocal of any rational number $\frac{p}{q}$, where $p$ and $q$ are integers and $q \neq 0$ is $\frac{q}{p}$

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