Let a =2 i +3 j +4 k , b = i -2 j -2 k and c =- i +4 j +3 k . If d is a vector perpendicular to both b and c...

Question

Let a =2 i +3 j +4 k , b = i -2 j -2 k and c =- i +4 j +3 k . If d is a vector perpendicular to both b and c , and a . d =18, then | a d |^2 is equal to-

Accepted Answer

(C)

JEE Main 2023 Mathematics question

Solution