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15 June, 10:33

Find the recursive formula ... 3, - 7, - 17, - 27, ...

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  1. 15 June, 12:42
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    The negative sign isnt changing back and forth, so its not a geometric sequence

    the difference between each term looks to be constant at 10

    a1 = 3

    a2=-7 = a1-10

    a3 = - 17 = a2-10

    oh look a pattern

    an = a (n-1) - 10
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