Question

5. For what value of x, will the two vectors
A = 2i + 2] – xk and B = 2i - 1-3k are perpendicu-
lar to each other ?
(7)x= -2/3
(2)x= 3/2
(3)x= - 4/3
(4) x= 2/3​

Answer 1

Answer:

i.i=1

2. j.j=1

3. k.k=1

4. i.j=0

5. j.k=0

6. i.k=0

So if you remember these rules this question is quite easy to solve.What you have to do is multiply the two given vectors according to the dot products rules.

So we have, A.B=0

(2i+2j+3k).(3i+6k+nk)=0

2i.3i + 2j.0j + 3k.(6+n)k =0

6+3(6+n)=0

6+n=-2

n=-8

Therefore the value of n is -8 for the two vectors A and B to be perpendicular.

Hope it helps! :)

Explanation:

Answer 2

Answer:

i dont know the answer..