Question

What is the first term of the geometric sequence below?

Answer 1

Geometric sequences use either division or multiplication as its common ratio.  The pattern here is multipication by 5.  Therefore, we would need that first term to be 1/5 because 1/5 * 5 = 1, the next term in the sequence. 1*5 = 5, 5*5 = 25, etc.