Asked by ABC

Find the sum of an A.P of seventeen terms whose middle term is five .
Answered by Reiny
of 17 terms, the middle term is term 9
so
a + 8d = 5 -----> a = 5-8d

sum(17) = (17/2)(2a + 16d)
= (17/2)(10-16d + 16d)
= (17/2)(10)
= 85
Answered by Mitch sabido
Find the sum of an a.p of seventeen terms whose middle terms is 5
Answered by Anonymous
Find the sum of 17 term of AP whose middle term is 40
Answered by Anonymous
An A.P contains 25 terms.Of the first term is 15 and the least term is 111,find the middle term
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