nattkat12 nattkat12

18-07-2016
Mathematics

Answered

what is the sum of the first 5 terms of a geometric series with a a1 = 10 and r = 1/5 ?

Verified Answer :

apologiabiology apologiabiology

18-07-2016

Sn=\(\frac{a1(1-r^n)}{1-r }\)

a1=10
r=1/5
n=5

Sn=\(\frac{10(1-(1/5)^5)}{1-(1/5) }\)
Sn=12.496

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