Question

Sum of n Natural Number formula

Answer 1

Heya Mate !!!

Here's Your Answer :-

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Formula ;-
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=> 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.


< Hope It Helps >

Answer 2

sum of n natural no. is
a = 1
d = 1
S of n terms = n/2 (2a+(n-1)d)
Sn = n/2 *(2+n-1)
Sn = n/2 *(n+1)
hope it will help