SOLUTION: If k is a positive integer, what is the average of 3^k and 3^(k+2)?

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Question 309774: If k is a positive integer, what is the average of 3^k and 3^(k+2)?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If k is a positive integer, what is the average of 3^k and 3^(k+2)?
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Avg = (3^k + 3^(k+2))/2 = (3^k + 9*3^k)/2
Avg = 5*3^k