Hello, I just have one question. Please explain so that I won't just 'have an answer' but an understanding so that I can practice these sort of problems on my own. Once again, thanks so much for all of your help and assistance .

1. What is the sum of the first 893 EVEN numbers?

Guest Jun 25, 2018

#1**+2 **

Note that the sum of the first n positive integers is just

n (n + 1) / 2

So....the sum of the first even positive integers would just be twice this =

(n) (n + 1) / 2 * 2 = ( n ) ( n + 1)

For instance....the sum of the first two positive even integers is just

2 ( 2 + 1) = 2 * 3 = 6

So....the sum of the first 893 positive even integers is just

893 ( 893 + 1) =

893 * 894 =

798,342

CPhill
Jun 25, 2018