Mathematics, 17.08.2021 16:20 brittanysanders

8. The first term and common difference of an arithmetic progression are a and - 2, respectively. The sum of the first n terms is equal to the sum of the first 3n terms. Express a in terms of n. Hence, show that n = 7 if a = 27.

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8. The first term and common difference of an arithmetic progression are a and - 2, respectively. Th...

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