SOLUTION: what is the sum of the first six terms in the geometric sequence 1,4,16?

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Question 845783: what is the sum of the first six terms in the geometric sequence 1,4,16?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
S=t*(1 - r^n)/(1 - r)
S=1*(1 - 4^6)/(1 - 4)
S = 1365
1,4,16,64,256,1024