Which represents the sum of the geometric series 4+12+36+108+...+78732?

asked Aug 1, 2019 109k views

3 votes

by Pach

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1 vote

Sn= a1- an r / 1-r
= 4-78732 (3) / 1-(3)
= 4-236196 / -2
= -236192 / -2
= 118,096

Darcy answered Aug 6, 2019