Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.3: Geometric Sequences
Problem 81E
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Expert Solution
Step 1
Given that:
The series is .
Step 2
By using,
The sum of the infinite geometric series is give by a + a r + ar2 + . . . + a r n - 1 + . . . = ,
where a is the first term and r is the ratio.
The sum converges to and diverges if .
Step 3
Consider the sum,
is the geometric series with first term a = 1 and the common ratio ( r ) = .
Also , r = < 1
Then,
It is convergent .
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