SOLUTION: Find the domain of the function f(x) = ln(12x - 48)

We can only take natural logs of positive numbers.  So we set 'what the
natural log is taken of' greater than 0.

12x - 48 > 0
     12x > 48
       x > 4

Graph:

-------------------o=========>
-2 -1  0  1  2  3  4  5  6  7

Interval notation:   <---domain

Edwin