Question

Let a be unit vector b=2i+j-k c=i+3k then maximum value of[a b c] is

Answer 1

Answer:

given:

b=2i+j+k

c=I+3k

a=unit vector{|a|}=1

soln;

[a b c] =[(1) (2i+j+k)(I+3k)]

= 2i+j+k+i+3k

=3i+j+4k.