Find the sum of the first 7 terms for the geometric series: 1/3+1+3+9+...

asked Jul 1, 2021 196k views

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Find the sum of the first 7 terms for the geometric series:
1/3+1+3+9+...

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3 votes

Answer:

364 1/3

Explanation:

use formula

a(1-q^n)/(1-q)

1/3(1-3^7)/(-2)

= 2186/6

=364.333333333

or 364 1/3

Adxl answered Jul 8, 2021

by Adxl

4.6k points

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