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the frst term of AP is 4 and the last term is 79.given that the sum of the AP is 996, find the number of terms and the commmon difference.

  • maths -

    Sn = n/2 (8+(n-1)d) = 996
    An = 4+(n-1)d = 79

    n = 24
    d = 75/23

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