![]() In the given series, the first term is a = 1 and the common difference is d = 3.įor the sum of 100 terms, substitute n = 100: Learn the why behind math with our certified expertsīook a Free Trial Class Examples on Sequences and Series FormulasĮxample 1: Find the value of the 25 th term of the arithmetic sequence 5, 9, 13, 17.Īnswer: Hence the 25 th term of the series is 101.Įxample 2: Find the sum of the first 100 terms of the arithmetic series 1 + 4 + 7 +.
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