Question

What is the logarithm of zero?

Answer 1

The logarithm of 0 is undefined.

Note that the logarithm base `b` of a number `n` answers the problem

`b^x = n`

Substituting `n` with `0`
`b^x = 0`

However, no matter what `b` or `x` is, `b^x` will never be 0.