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28 August, 21:18

What is the 38th term of the arithmetic sequence of 21, 14, 7, ...

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  1. 28 August, 21:25
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    Step-by-step explanation:

    First term (a) = 21

    common difference (d) = 14-21 = - 7

    general equation for nth term = a + (n-1) d

    The 38th term of the AP = 21 + (38-1) (-7)

    = 21 + (37) (-7)

    = 21 - 259 = - 238
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