For any integer k, let _k= ( k 7 )+i ( k 7 ), where i= -1 . The value of the expression _ k=1 ^ 12 | _ k+1 -...

Question

For any integer k, let _k= ( k 7 )+i ( k 7 ), where i= -1 . The value of the expression _ k=1 ^ 12 | _ k+1 - _k| _ k=1 ^ 3 | _ 4k-1 - _ 4k-2 | is

Accepted Answer

4

JEE Advanced 2015 Mathematics question