# What is the 9th term of the geometric sequence where a1 = -7 and a6 = -7,168?

##### 1 Answer

Jan 9, 2016

#### Explanation:

The general term of a geometric sequence can be written:

#a_n = a r^(n-1)#

where

We are given:

#a = a_1 = -7#

#a r^5 = a_6 = -7168#

So

(assuming we are dealing with a Real geometric sequence)

Then