If u = a^2 ^2 + b^2 ^2 + a^2 ^2 + b^2 ^2 , then the difference between the maximum and minimum values of u^2...

Question

If u = a^2 ^2 + b^2 ^2 + a^2 ^2 + b^2 ^2 , then the difference between the maximum and minimum values of u^2 is given by

Accepted Answer

(4)

JEE Main 2004 Mathematics question