how to find the nth term when the sum of first nth term is given. pls explain in detail
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✏A series whose terms are in Arithmetic progression is called Arithmetic series.
To find sum of arithmetic series, we use one of the formulas given below.
Sn = (n/2) [a + l]
Sn = (n/2) [2a + (n - 1)d]
a = first term,
n = number of terms of the series,
d = common difference and l = last term.
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