Question

Write the formula to find the sum of first 'n' natural number​

Answer 1

Answer:

Sn=n/2 [2a +{n-1}d]

This is the formula for finding the sum of first n natural number!

If you have fist and last term you can find by

Sn= n/2[a+an]

Answer 2

Answer:

Step-by-step explanation:

Let the number of natural numbers be n

so

they form an AP with difference b/w consecutive terms as 1

SUM of n terms of an AP: n/2(2a+(n-1)d)

sum = n/2(2(1) + (n-1)(1))

sum = n/2(2+n-1)

sum= (n)(n+1)/2

CHEERS AMIE

PLEASE MARK BRAINLIEST