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Mathematics
Mathematics
Problem
Show that the points
(
1
,
2
,
3
)
(1, 2, 3)
(
1
,
2
,
3
)
,
(
−
1
,
−
2
,
−
1
)
(-1, -2, -1)
(
−
1
,
−
2
,
−
1
)
,
(
2
,
3
,
2
)
(2, 3, 2)
(
2
,
3
,
2
)
and
(
4
,
7
,
6
)
(4, 7, 6)
(
4
,
7
,
6
)
are the vertices of a parallelogram.
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