Question

Explain why log(-100) is not defined.

Answer 1

lets go over how we 'read' logs.
What does log(100) mean?

Answer 2

Have you tried looking at the graph of log(x)

Answer 3

\[\log(-100)=y\iff 10^y=-100\] try solving and see what happens

Answer 4

Assuming you're working with \(\sf \mathbb{R}\)

Answer 5

@perl @abb0t @satellite73 the answer to my question was simply, because the inner expression of a log must be postive

Answer 6

Ok.

Answer 7

All you needed to do was observe the graph