The second term of a convergent geometric series is 20 and the Fourth term is 5
determine the possible values of the common

1 thought on “The second term of a convergent geometric series is 20 and the Fourth term is 5 <br />determine the possible values of the common”

1. ar = 1/2

   a/(1-r) = 4

   a = 2-√2

   r = 1/4 (2+√2)

   or

   a = 2+√2

   r = 14 (2-√2)

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