The sum of first n natural numbers equals?
- n(n + 1)2
- n²
- 2n
- None of these
Explanation
Sum = 1 + 2 + 3 + ... + n = n(n + 1)/2
Example: n=5 → 5×6/2 = 15 → 1+2+3+4+5=15
Last verified on 09-06-2026
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