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Mathematics
Mathematics
Problem
Find the value of
k
k
k
for which the vectors
⟨
1
,
k
,
−
2
⟩
\langle1,k,-2\rangle
⟨
1
,
k
,
−
2
⟩
and
⟨
3
,
4
,
k
⟩
\langle3,4,k\rangle
⟨
3
,
4
,
k
⟩
are perpendicular to each other.
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