The sum of the following series 1+6+ 9 (1^2+2^2+3^2 ) 7+ 12 (1^2+2^2+3^2+4^2 ) 9+ 15 (1^2+2^2+ +5^2 ) 11 + up...

Question

The sum of the following series 1+6+ 9 (1^2+2^2+3^2 ) 7+ 12 (1^2+2^2+3^2+4^2 ) 9+ 15 (1^2+2^2+ +5^2 ) 11 + up to 15 terms, is

Accepted Answer

(B)

JEE Main Mathematics question