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What is the sum of a 17term arithmetic sequence where the first term is 9 and the last term is 87?
 one year ago
 one year ago
What is the sum of a 17term arithmetic sequence where the first term is 9 and the last term is 87?
 one year ago
 one year ago

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shegBest ResponseYou've already chosen the best response.1
use the general formula of summation of an arithmetic series
 one year ago

eSpeXBest ResponseYou've already chosen the best response.1
S_n = a_1 + d(a_n1) is the other form I believe.
 one year ago
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