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posted by john Tuesday, April 23, 2013 at 12:01pm.
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.
a=4 Sn = n/2 (8+(n-1)d) = 996 An = 4+(n-1)d = 79 n = 24 d = 75/23
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