For the following geometric sequence, find the explicit formula.

{1.-3,9 ... }

Question

Mathematics

Elianna

Today, 13:54

For the following geometric sequence, find the explicit formula.

{1.-3,9 ... }

+1

Answers (1)

Know the Answer?

Enrique Barrett · Answer 1

an = (-3) ^ (n-1).

Step-by-step explanation:

The formula for the nth term an = a1r^ (n-1) where a1 = first term and r = the common ratio.

In our series a1 = 1 and r = - 3/1 = - 3 so the explicit formula is:

1. * (-3) ^ (n-1)

For the following geometric sequence, find the explicit formula.{1.-3,9 ... }

For the following geometric sequence, find the explicit formula.

{1.-3,9 ... }