Let a = i + j + k , b = 2 i +2 j + k and d = a b . If c is a vector such that a . c = | c |, | c -2 a |^2 = 8...

Question

Let a = i + j + k , b = 2 i +2 j + k and d = a b . If c is a vector such that a . c = | c |, | c -2 a |^2 = 8 and the angle between d and c is /4, then 2|10-3 b . c | + | d c |^2 is equal to ......

Accepted Answer

6

JEE Main 2025 Mathematics question

Solution