The value of _ k=1 ^ 13 1 ( 4 + (k-1) 6 ) ( 4 + k 6 ) is equal to

JEE Advanced 2016 Mathematics question

The value of is equal to

Answer: (C)

With and : . The sum telescopes:

Create a free account to read the complete working, and practise questions like this in a timed test.

Question ID VK-026576