Question

What is the common ratio in the geometric sequence 40, 20, 10...?

Answer 1

`0.5 or 1/2`

Explanation:

The common ratio is what you multiply each term by to get the next one. In this case, it is 0.5:

`40xx0.5=20`

`20xx0.5=10`

You find the ratio by dividing any term by the one preceding it.

`20/40=0.5`

`10/20=0.5`