Question

Find the unit vector of a-b if a=2i+3j-k and b=I+j-2k

Answer 1

a-b= 2i+3j-k-(i+j-2k)
=2i+3j-k-i-j+2k
=i+2j+k
unit vector of a-b is( i+2j+k)

Answer 2

Answer:

⇒ a-b= 2i+3j-k-(i+j-2k)

⇒ =2i+3j-k-i-j+2k

⇒ =i+2j+k

⇒ unit vector of a-b is( i+2j+k)