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27 October, 19:13

Arithmetic sequence of 9, 209 409, 609 and what id the difference?

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  1. 27 October, 19:23
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    d=200

    Step-by-step explanation:

    First term

    a=9

    Second term

    a+d=209

    Third term

    a+2d=409

    Fourth term

    a+3d=609

    Find the common difference (d)

    From the second term

    a+d=209

    a=9

    Therefore,

    9+d=209

    d=209-9

    =200

    d=200
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