Question

what is the sum of first 50 natural number
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Answer 1

Answer:-

$1275$

Explanation:-

The sum of first n natural number is

$s(n) = \frac{n}{2} (first + last)$

$s(50) = \frac{50}{2} (1 + 50)$

$s(50) = 25 \times 51$

$1275$

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