be any non
zero scalar. Then for what possible values of x, y and z given below, the
vectors 
are
perpendicular
(a)
x = 
Answer:
and 
are
perpendicular
if 
2x + 3y ? 4z =
0
On putting x = ?
y = 2
z =
we get ?2 + 6 ? 4 = 0
Ans. (c) is
correct.
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