Math, asked by adityaauchar9, 11 months ago

write the formula for the sum of first n natural number​

Answers

Answered by bestbest7777777777
1

natural numbers are in AP with d = 1

Sn = n/2 ( 2a + (n-1)d )

where d = 1

Sn = n/2 ( 2a + n -1)

Sn = na + n^2/2 - n /2

a is also one as 1 is the first natural number

Sn = n + n^2/2 -n/2

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

Step-by-step explanation:

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