VectorHard
Question
Let 
and 
. If the vector 
lies in the plane of 
and 
, then x equals
and . If the vector lies in the plane of and , then x equalsOptions
A.0
B.1
C.- 4
D.- 2
Solution
and 
= 03x + 2 - x + 2 = 0
2x = -4
x = -2.
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