SOLUTION: how many terms must be added in an arithmetic sequence whose first term is 11 and whose common difference is 3 to obtain a sum of 1092

SOLUTION: how many terms must be added in an arithmetic sequence whose first term is 11 and whose common difference is 3 to obtain a sum of 1092

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Question 854063: how many terms must be added in an arithmetic sequence whose first term is 11 and whose common difference is 3 to obtain a sum of 1092

Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
S = �(2a + d(n-1))n
1092 = �(2*11 + 3(n-1))n
n = 24
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