Difference {common difference} between consecutive sequence terms can be constant {arithmetic progression}. General term is a(n) = a(1) + d * (n - 1), where d is common difference. First-n-terms partial sum is n times average of first and last terms: Sn = n * (a(1) + a(n)) / 2, where a(k) is general term, and n is number of terms.
Mathematical Sciences>Calculus>Series>Kinds>Progression
3-Calculus-Series-Kinds-Progression
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Date Modified: 2022.0224