Let A be the sum of the first 20 terms and B be the sum of the first 40 terms of the series 1^2 + 2 2^2 + 3^2...

Question

Let A be the sum of the first 20 terms and B be the sum of the first 40 terms of the series 1^2 + 2 2^2 + 3^2 + 2 4^2 + 5^2 + 2 6^2 + If B - 2A = 100 , then is equal to :

Accepted Answer

(B)

JEE Main 2018 Mathematics question

Solution