SOLUTION: the following sum is a partial sum in a geometric sequence, use this fact to evaluate the sum.
3+12+...+786432
Algebra.Com
Question 438181: the following sum is a partial sum in a geometric sequence, use this fact to evaluate the sum.
3+12+...+786432
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
n = 9, and , r = 4
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