Is the following a geometric sequence 1, 5, -25, 125,…?

1 Answer
Nov 8, 2015

Answer:

No

Explanation:

In a geometric sequence, you have to multiply (or divide) with a constant number.

If the sequence was #-1, 5, -25, 125...#, it would have been a geometric sequence, because you are always multiplying by #(-5)#.

In the sequence #( 1, 5, -25, 125)#, you start by multiplying by #5#, followed by multiplying with #(-5)#