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Math Help - finite geometric series

  1. #1
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    finite geometric series

    Can someone please help me work through this one?

    Find sum of geometric series:

    2 + 2*(0.35) + 2*(0.35)^2 + ... + 2*(0.35)^7
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  2. #2
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    r = 0.35
    a = 2
    n = 8

    S(8) = 2(1-0.35^8)/(1-0.35)
    = 3.07623019


    Correct?
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  3. #3
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    Quote Originally Posted by relyt View Post
    r = 0.35
    a = 2
    n = 8

    S(8) = 2(1-0.35^8)/(1-0.35)
    = 3.07623019


    Correct?
    If you have used the correct formula and done the arithmetic correctly then it will be the correct answer.
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