SOLUTION: what is the sum of the first 15 terms in the geometric sequence 2,4,8...?

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Question 301739: what is the sum of the first 15 terms in the geometric sequence 2,4,8...?
Answer by Alan3354(69443) About Me  (Show Source):
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what is the sum of the first 15 terms in the geometric sequence 2,4,8...?
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It's 2*(1,2,4,8...)
= 2*(2^15 - 1)
= 2^16 - 2
= 65534