D: (-infinity, 0) U (0, infinity) because you cant have a zero in the bottom of the fraction
The rule of a geometric sequence:

We have:

Find 
substitute:

Answer:
see the explanation
Step-by-step explanation:
we know that
<u><em>Alternate Exterior Angles</em></u> are created where a transversal crosses two lines. Notice that the two alternate exterior angles are equal in measure if the two lines are parallel
In this problem
----> by alternate exterior angles
One way to verify alternate exterior angles is to see that they are the vertical angles of the alternate interior angles