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An infinite geometric series has common ratio -1/3 and sum 25 What is the second term of the sequence?

 Jul 14, 2018
 #1
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S= a / (1 - r)

25 = a / (1 - (-1/3))

25 = a / (1 1/3)

a =25 x (1 1/3)

a =33 1/3 - This is the first term

33 1/3 x -1/3 =-11 1/9 This is the second term.

 Jul 14, 2018
 #2
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I think you mean -(11 1/9)

 Jul 14, 2018
 #3
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Yes that is what was written.

Melody  Jul 14, 2018

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