SOLUTION: what is the sum of the first five terms of the geometric sequence in which a1=10 and r=1/2

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Question 885548: what is the sum of the first five terms of the geometric sequence in which a1=10 and r=1/2
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!

S=10*(1 - 1/2^5)/(1 - 1/2)
S=t*(1 - r^n)/(1 - r
155/8