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Mathematics
Mathematics
Problem
Let
p
⃗
=
(
k
,
2
,
1
)
\vec{p}=(k,2,1)
p
=
(
k
,
2
,
1
)
and
q
⃗
=
(
1
,
−
1
,
2
)
\vec{q}=(1,-1,2)
q
=
(
1
,
−
1
,
2
)
. If the scalar projection of
p
⃗
\vec{p}
p
on
q
⃗
\vec{q}
q
equals
3
3
3
, find the value of
k
k
k
. a)
3
2
3\sqrt2
3
2
b)
3
3
3
c)
3
6
3\sqrt6
3
6
d)
−
3
6
-3\sqrt6
−
3
6
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