Question

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

Answer 1

Answer:

Because that give you something like this $\frac{a}{0}$ who is undefined.

Step-by-step explanation:

When you raise something to a negative exponent give you:

$a^{-b} = \frac{1}{a^b}$

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'