Find vectors perpendicular to both of the given vectors.
(a) ---> (3i-2k) and 2k
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do the same cross product: your vectors are (3,0,-2) and (0,0,2)
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It says j is also a possiblity in my textbook?
ya, any j actualy
It just says, -6j or j are the answers.. how is j?
sry.. Only -6j this is what you get when cros multiply your vectors.
But it says j is also an answer...
(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 .
any paralel vector to -6j will be also a solution. Ok?
if you dont get it, tell me i try to explain better