If a1= 7 and r=3, find a4

a4 = 189

Step-by-step explanation:

Geometric sequence:

In a geometric sequence, the quotient r between consecutive terms is always the same.

The nth term of the sequence is given by:

In which is the first term.

In this question:

The fourth term is:

So

a4 = 189

1. x= -3. 2. (-3,-4). 3. axis of symmetry. 4. 2 zeros. 5. (-5,0) and (-1,0) or -1 and -5.

6. 0.

Step-by-step explanation:

Hope this helps!