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What is the sum of the arithmetic sequence 8, 15, 22 …, if there are 26 terms?

Curtis Rhodes

in Mathematics

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Donald Ward on January 3, 2019

For the normal sequence 1, 2, 3, ..., a, then sum isIf we multiply each number by 7 (7, 14, 21, ...), then the sum isand if we add 1 to each number (8, 15, 22, ...), then the sum isWe have terms, so the sum is:


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