Mathematics, 24.09.2021 01:50 txa95
the first n terms of the progression. 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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the first n terms of the progression. The first term and common difference of an arithmetic progress...
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