The sum of the first n natural numbers is given by _________(a) n(n+1)/2(b) n(n-1)/2(c) n^2(n+1)/2(d) None of the mentionedThis question was posed to me during an internship interview.My question comes from Special Sequences in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

The sum of the first n natural numbers is given by _________(a) n(n+1)

1.	The sum of the first n natural numbers is given by _________(a) n(n+1)/2(b) n(n-1)/2(c) n^2(n+1)/2(d) None of the mentionedThis question was posed to me during an internship interview.My question comes from Special Sequences in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics
Answer» The correct choice is (a) n(n+1)/2 The EXPLANATION is: 1 + 2 + 3 + 4 +……n = (n/2)(1 + n) SINCE this is AP.

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