Question

what is the sum of all even numbers from 1 to 100 using formula

Answer 1

total no. of even no between 1 and 100 is 100/2=50 =n ....so it's first term =2=a .... and last term =100= l
$sum \: of \: nth \: term = \frac{n}{2} (a + l) = \frac{50}{2} (2 + 100) = 25 \times 102 = 2550$

Answer 2

If It Is Right Plese Mark As Brainliest..