Question

Find vectors perpendicular to both of the given vectors.
(a) ---> (3i-2k) and 2k

Answer 1

do the same cross product: your vectors are (3,0,-2) and (0,0,2)

Answer 2

-6j

Answer 3

Oh, Ok.

Answer 4

It says j is also a possiblity in my textbook?

Answer 5

ya, any j actualy

Answer 6

It just says, -6j or j are the answers.. how is j?

Answer 7

sry.. Only -6j this is what you get when cros multiply your vectors.

Answer 8

But it says j is also an answer...

Answer 9

(3,0,-2) and (0,0,2)
(0,a,0).(3,0,-2) = 0 + 0 + 0 =0
(0,a,0).(0,0,2) = 0 + 0 + 0 = 0
So actualy any (0,a,0) vector will do. I said -6j, since that's the result of cross multiplication, but this vector is equal -6(0,1,0) no? so it's paralel .

Answer 10

any paralel vector to -6j will be also a solution. Ok?

Answer 11

hmmm. OK

Answer 12

if you dont get it, tell me i try to explain better

Answer 13

I understand. Don't worry :)

Answer 14

kk