SOLUTION: If b is positive, what is the value of b in the geometric sequence 9,a,4,b? Express your answer as a common fraction.

SOLUTION: If b is positive, what is the value of b in the geometric sequence 9,a,4,b? Express your answer as a common fraction.

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Question 980366: If b is positive, what is the value of b in the geometric sequence 9,a,4,b? Express your answer as a common fraction.
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
r, common ratio.
, and then .

You can finish from the term at index 1 or from the term at index 3. You want the POSITIVE value for r.

Easiest enough to continue from index of term 3.
.
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