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Math Help - Sequence question

  1. #1
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    Sequence question

    Let {An}14 n = 0 be the sequence of powers of 3 with An = 3^n. Determine the value of the corresponding series.

    1 + 3 + 9 + ...... + 4 782 969.

    do i just use An= Ar^n-1 ?

    thanks for any help
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  2. #2
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    Quote Originally Posted by smplease View Post
    Let {An}14 n = 0 be the sequence of powers of 3 with An = 3^n. Determine the value of the corresponding series.

    1 + 3 + 9 + ...... + 4 782 969.

    do i just use An= Ar^n-1 ?

    thanks for any help
    Use the formula for the sum of a geometric series: Geometric series - Wikipedia, the free encyclopedia
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