Problem 45364. Sum of series

 a(n) = n^2 - (n-1)^2

find the summation of the series upto n i.e.

   a(1)+a(2)+...+a(n)
Solve

Solution Stats

56.62% Correct | 43.38% Incorrect
Last Solution submitted on Jan 14, 2026

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basic easy series sum

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