Question

If vector a =i+j+k and b= xi+ yj + zk where x, y, z = e{-2,-1,0, 1, 2} then find number of distinct vectors b such that a is perpendicular to b.
(a) 18
(b) 19
(c) 15
(d) 16​

Answer 1

Answer:

16 is this the answer and correct