Question

How do you write the exponential notation for `log_y 27 = 3`?

Answer 1

`y^3=27`

You did not request that the value for y be determined. Only how the notation be represented.

Answer 2

Use the definition of log:

Explanation:

You take the base `y` and "push" up the `3` getting rid of the log to get:
`27=y^3`
where you can see that `y=3` because `3^3=27`.