Mathematics
Mathematics, 16.04.2021 20:10, izzy0627

Notation. 1.2
Prove that in any arithmetic series in which the first term is a and whose constant
difference is d, the sum of the first n terms is Sn = 12a + (n - 1)d]

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Notation. 1.2
Prove that in any arithmetic series in which the first term is a and whose const...

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