Discussion
The sum of the first n even, positive integers is 2 + 4 + 6 + · · · + 2n is n(n + 1). What is the sum of the first 20 even, positive integers?
*This question is included in Nova Math - Problem Set Y: Sequences & Series, question #6
| (A) | 120 |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 06/27/2015 15:05
Please explain why we put n=20.Thank you
Posted: 06/27/2015 22:27
Hi Munir,
The problem is asking for 'the sum of the first 20 even, positive integers' and the problem states that the formula returns 'the sum of the first n even, positive integers,' so we choose n to be 20.
Nova Press
The problem is asking for 'the sum of the first 20 even, positive integers' and the problem states that the formula returns 'the sum of the first n even, positive integers,' so we choose n to be 20.
Nova Press