Question

Select the correct alternative and write it. 

What is the sum of first n natural numbers ? 

 

Options

• (A)` (n(n-1))/2` 

• (B)`n/2(n-2)`

• (c)` n(n+1)/2` 

• (D) `(n(n+2))/2`

Answer 1

(c) `(n(n+1))/2`