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Thread: Expression

  1. Sep 7th, 2007, 04:06 AM #1
    Yunie
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    Expression

    Find an expression in terms of n, for the nth term of the sequence 17, 14, 11, 8, 5, ...


    The answer is 20 - 3n

    But I do not understand why the answer is that so could anyone explain it to me? Thanks a lot!
    I really want to do well in maths. Please help and tolerate my stupidness.

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  2. Sep 7th, 2007, 05:09 AM #2
    opus
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    Re: Expression

    17 is the first element of the sequence, so f(1)=17 and f(2)=14 .... f(5)=5.
    If you put the n=1 into the formula you get 17
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