Question

The sum of all positive even integers between 1 and 70 is

Answer 1

Step-by-step explanation:

So even integers between 1 and 70 are 2,4,........,68

These are in AP with common difference d = 2

and a = 2

68 = 2+(n-1) 2 => n = 34

then Sum of even integers between 1 and 70 = (34/2)(2+68) = 17 × 70 = 1190. ANS

Hope you get it buddy. Best of Luck