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4 votes
Find the S20 of this series
2, 6, 18,..

2 Answers

3 votes

The first term in our sequence = 2

The common ratio = 6 / 2 = 3

n = the term we want to find.

2 * (3)^(n - 1)

2 * (3)^(20 - 1)

2 * (3)^(19)

2 * 1162261467

2324522934 is the 20th number in the series.

User Thibaud Clement
by
8.4k points
5 votes
Multiply it by 3 until you get it
User Mlemay
by
7.6k points
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