Question

n^2=the sum of first n____natural number​

Answer 1

$n ^{2} \: is \: the \: sum \: of \: odd \: first \: n \: odd \:$

numbers

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Answer 2

Sum of the First n Natural Numbers

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