Question

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work.
{-4, 12, -36,...}

Answer 1

Answer:

108

Step-by-step explanation:

common ratio (r) = 2nd term/1st term = 12/-4 = -3

$a_{n}=a_{n-1}*(-3)\\a_{5}=a_{4}*(-3)\\\\ = -36*(-3)\\\\ = 108$