Question

What is the sum of first n natural numbers?
a)n(n-1)/2
b)n/2( n-2)
c)n(n+1)/2
d)n(n+2)/2​

Answer 1

Sum of the First n Natural Numbers

Sum of the First n Natural Numbers+ n = n(n+1) / 2, for n a natural number.

Answer 2

$\frac{n(n + 1)}{2}$

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