Q31Multiple choice
If a , b , c are three vectors such that a + b + c = 0 and a = 2 , b = 3 , c = 5 , then value of a .b + b.c + c.a is
- (A)0
- (B)1
- (C)– 19
- (D)38
If a , b , c are three vectors such that a + b + c = 0 and a = 2 , b = 3 , c = 5 , then value of a .b + b.c + c.a is