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