Class 11 Maths Sequences Series Sum of Special Series

Sum of Special Series

Sn=1 + 2 + 3 + … + n, then Sn = n(n+1)/2

Sn = 12 + 22 + 32 + … + n2 , then Sn = n (n+1)(2n+1)/6

Sn = 13 + 23 + ...+n3, then Sn = [n(n+1)]2/4

Refer ExamFear Video Lessons for Proofs.

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