briannarose2003 briannarose2003

16-01-2019
Mathematics

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What is the sum of an infinite geometric series if a1 = 5 and r = 1/3

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wegnerkolmp2741o wegnerkolmp2741o

16-01-2019

Answer:

7.5

Step-by-step explanation:

The first term is 5 and the ratio is 1/3

The formula for the sum of an infinite geometric series is

S = a1 / (1-r )

S = 5 / (1- 1/3)

= 5 /(2/3)

= 5 * 3/2

= 15/2

= 7.5

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