SOLUTION: What is the value of the fourth term in a geometric sequence for which a1=15 and r=1/3?

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Question 1043621: What is the value of the fourth term in a geometric sequence for which a1=15 and r=1/3?
Answer by ikleyn(52788) About Me  (Show Source):
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What is the value of the fourth term in a geometric sequence for which a1=15 and r=1/3?
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15,  15%2F3 = 5,  5%2F3,  5%2F9.

Answer. The 4-th term is 5%2F9.

On geometric progression read the lesson
    - Geometric progressions
in this site.