MHB Rational Number equations help

[Paige1]

I have a question in math I need help with please:
Show that the product of a rational number and it's inverse is equal to 1, with one exception. what is the exception? can anyone help please?

 

[kaliprasad]

I have a question in math I need help with please:
Show that the product of a rational number and it's inverse is equal to 1, with one exception. what is the exception? can anyone help please?

zero is the exception as it does not have inverse

 

[Paige1]

zero is the exception as it does not have inverse

Thank you!

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zero is the exception as it does not have inverse

however, what is the product of the rational number and it's inverse?

 

[MarkFL]

We could choose to let the rational number be:

$$\frac{m}{n}$$ where $$m,n\in\mathbb{Z}\land m\ne0$$ (This just means $m$ and $n$ are integers, with $m$ not equal to zero.)

So, what would the multiplicative inverse, or reciprocal, of $m$ be?