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In Problems 22–25, determine whether each infinite geometric series converges or diverges. If it converges, find its sum

2-1+12-14+.....

Short Answer

Expert verified

The geometric series converges.

Its sum is:43

Step by step solution

01

Step 1. Given information.

The series is :

2-1+12-14+.....
02

Step 2. To find common ratio and first term. 

First term of the series is:a=2

Common ratio is:

r=-12

r=12

Sincer<1

Hence given series converges.

03

Step 3. To find sum of infinite terms. 

S∞=21--12=21+12=232=43

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