Question

what is yhe sum of first n natural number

Answer 1

hola mate

here is your answer

hope this helps

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1+2+3+4+.......+n

sum of first n natural numbers = n×( n+1)/2

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Answer 2

If you are a tenth grade then this answer is more useful

natural nos are 1,2,3,4, .....
It forms an Arithmetic progression with first term a=1 and common difference d= 1

Formula of Sn ie sum to n terms is given by
$\frac{n}{2} (2a + (n - 1)d)$
putting a=1 and d= 1

Sn is
$\frac{n}{2} (2 +( n - 1)1) \\ = \frac{n}{2} (2 + n - 1) \\ = \frac{n}{2} (n + 1)$
This is the answer. Hope it helps. Pls mark my answer as the branliest.