derive the formula for the sum …
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Sia ? 2 years, 3 months ago
The sum of arithmetic progression whose first term is a and the common difference is d can be calculated using one of the following formulas: Sn = n/2 (2a+(n−1)d) and Sn = n/2 (a1+an). The sum of AP of n natural numbers is n(n+1)/2.
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