Question

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

Answer 1

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)`