Question

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

Answer 1

n(n + 1)

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Answer 2

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$\implies$$\large\bf{\underline{\red{n(n+1)/2}}}$

MORE TO KNOW:-

Sum of the First n Natural Numbers

We prove the formula 1+ 2+ ... + n = n(n+1) / 2, for n a natural number.

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