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Thread: Arithmetic Sequence

  1. November 19th 2008, 02:00 PM #1
    civiliam
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    Arithmetic Sequence

    Find the first 4 terms of an Arithmetic Sequence with 7th term of 18 and the common difference is 3/2

    not exactly sure how to do this thanks in advance
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  2. November 19th 2008, 02:10 PM #2
    skeeter
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    a_n = a_1 + (n-1)d
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