Question

sum of first n natural number is​

Answer 1

Answer:

n(n+1)/2

Step-by-step explanation:

Simple formula

Sum of n squares=n(n+1)(2n+1)/6

Answer 2

Answer:

Sum of the First n Natural Numbers

+ 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.