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Subjects>Math>Algebra

Given the arithmetic sequence -11-16-21 what is S30?

Anonymous

∙ 16y ago

Updated: 4/28/2022

-161.

Wiki User

∙ 16y ago

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Q: Given the arithmetic sequence -11-16-21 what is S30?

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How do you find the sum of the first thirty odd integers?

The arithmetic sequence of odd integers is 1, 3, 5, 7, 9, ... where the common difference is 2. The sum of the first thirty odd integers can be found by using the sum formula such as: Sn = n/2[2a1 + (n - 1)d], where a1 = 1, n = 30, and d = 2. So, S30 = (30/2)[(2)(1) + (30 - 1)(2)] = (15)[2 + (29)(2)] = (15)(60) = 900

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