Let a and b be two vectors, Let | a | = 1, | b | = 4 and a . b = 2. If c =(2 a b )-3 b , then the value of b...

Question

Let a and b be two vectors, Let | a | = 1, | b | = 4 and a . b = 2. If c =(2 a b )-3 b , then the value of b . c is

Accepted Answer

(B)

JEE Main 2023 Mathematics question