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anonymous
 4 years ago
What is the sum of a 17term arithmetic sequence where the first term is 9 and the last term is 87?
anonymous
 4 years ago
What is the sum of a 17term arithmetic sequence where the first term is 9 and the last term is 87?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0use the general formula of summation of an arithmetic series

eSpeX
 4 years ago
Best ResponseYou've already chosen the best response.1S_n = a_1 + d(a_n1) is the other form I believe.
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