Question

When using the negative exponent properties, why is it important to know if any of the variables is equal to 0?

Answer 1

Because that give you something like this
`(a)/(0)` who is undefined.

Explanation:

When you raise something to a negative exponent give you:

`a^(-b) = (1)/(a^b)`

Then if
`a` is equal to 0 is considerate undefined because whatever number raising 0 is equal to 0.

This video explain why you can't divide by zero if you want a deepest answer: 'Why can't you divide by zero? - TED-Ed'