Answers

  • Brainly User
2016-07-20T13:23:16+08:00
Geometric mean (a₂) =  \sqrt{ \frac{1}{4} (9)}  = \sqrt{ \frac{9}{4} }
                                  = 3/2

Geometric mean = 3/2

The sequence is 1/4, 3/2, 9

Common ratio:
3/2 ÷  1/4  ⇒   (3/2)(4/1) = 6
9 ÷ 3/2      ⇒   (9) (2/3)  = 6

Common ratio = 6
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