Find the sum of the arithmetic series 6 + 12 + 18 + ... + 60

tragikovas 2022-09-14 Answered
Find the sum of the arithmetic series 6 + 12 + 18 + ... + 60
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Answers (1)

Yaritza Cardenas
Answered 2022-09-15 Author has 20 answers
a n = a 1 + ( n - 1 ) d
60 = 6 + ( n - 1 ) ( 6 )
n = 10
Now that we know 60 is the 10th term , use the sum formula ...
sum= = a 1 + a n 2 × n
sum = 6 + 60 2 × 10 = 330
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