Question

what will be the sum of first n natural number from the following​

Answer 1

Answer:

Sum of the First n Natural Numbers

We prove the formula 1+ 2+ ... + n = n(n+1) / 2, for n a natural number. There is a simple applet showing the essence of the inductive proof of this result.

Answer 2

Answer:

The sum of first n natural numbers is given by

Sn=n(n+1)/2

Hope it will help u..