Question

Find the common ratio of the sequence. –172, –86, –43, –21.5, . . .

Answer 1

The common ratio of each one is 1/2 or .5
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Brainliest?

Answer 2

If you divide each number by the previous one, you get:

-86 / -172 = 1/2
-43 / -86 = 1/2
-21.5 / -43 = 1/2

The common ratio is 1/2 = 0.5