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What is the sum of the geometric sequence 1, 3, 9, if there are 11 terms?

User Eghosa
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2 Answers

3 votes
The answer is 88,573
User Alex King
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7.7k points
4 votes

Answer:

The sum of GP series is 88573

Explanation:

Given the geometric sequence

1, 3, 9,... 11 terms

we have to find the sum of 11 terms.

a=1, r=3, n=11

The formula for finite terms of GP is


S_n=(a(1-r^n))/(1-r)


=(1(1-3^(11)))/(1-3)=(177146)/(2)=88573

The sum of GP series is 88573

User Joel Teply
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