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23 July, 04:00

Find the 75th term of the arithmetic sequence - 21, - 10, 1 ...

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  1. 23 July, 04:45
    0
    793

    Step-by-step explanation:

    a1=-21

    d=-10 - (-21) = 11

    an=a1 + (n-1) d

    a75=-21 + (75-1) * 11

    =-21+74*11

    =-21+814

    =793
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