Question

Question #9416d

Answer 1

We know that the values of `f(x)` are real numbers for
`f(x) = Log_a ( x - k)` where `k` constant, if argument of `log` is positive.
`(x-k)>0`
`=>x>k`

Inserting given numbers we get domain of
`log(x-7)` in inequality form as
`x>7`
In interval form as
`(7 , + oo)`