Question

What is the first term of the geometric sequence below ? 1,5,25,125

Answer 1

1/5 becuase if you multiply by 5, it has to be 1, which means it has to be 1/5 

Answer 2

The first term? 1. 
The fifth term would be 625.
1*5=5
5*5=25
25*5=125
125*5=625
The common ratio of the geometric sequence is 5.

Hope this helps!