Question

What is the sum of first 40 natural number

Answer 1

Answer:

820

Step-by-step explanation:

820 is a number of series from 1 to 40 by applying the values of input paramaeters in formula

Answer 2

$1 + 2 + 3 + .......... + 40$

$a = 1$

$n = 40$

$last \: term \: (l) = 40$

$sn = \frac{n}{2} (a + l)$

$sn = \frac{40}{2} (1 + 40)$

$sn = 20(41) = 820$

$therefore. \: sum \: of \: first \: 40 \: natural \: numbers \: = 820$