Question

If
the
a=2î -j-k and b= µî+j+5k
vectors
perpendicular to each other, then value of μ
are
(A) 2
(B) 3
(C) 1
(D) 6

Answer 1

Answer:

3

Step-by-step explanation:

a.b=0

so

(2i-j-k).(ui+j+5k)=0

2u-1-5=0

2u=6

u=3