How to do this question?
2 Answers
Option D
Explanation:
Take any pair:
So, term by term:
So you have:
Option D. See process below
Explanation:
We notice that
The sum of both expresions (the two first sum terms) is 2
The sum of both expresions (third and fourth) is 1
The sum of both terms is
For last two terms
The sum of both terms is
So we have
Correct answer: D