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Mathematics
Mathematics
Problem
8. Find the unit vector in the direction of vector
P
Q
→
\overrightarrow{\mathrm{PQ}}
PQ
, where P and Q are the points (
1
,
2
,
3
1,2,3
1
,
2
,
3
) and (
4
,
5
,
6
4,5,6
4
,
5
,
6
), respectively.
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