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Mathematics
Mathematics
Problem
If
x
\mathbf{x}
x
is a vector such that
[
p
q
r
]
x
=
(
p
×
q
)
×
r
[\mathbf{p} \mathbf{q} \mathbf{r}] \mathbf{x} = (\mathbf{p} \times \mathbf{q}) \times \mathbf{r}
[
pqr
]
x
=
(
p
×
q
)
×
r
, then
x
\mathbf{x}
x
is a.
c
(
i
^
−
2
j
^
+
k
^
)
c(\hat{i} - 2\hat{j} + \hat{k})
c
(
i
^
−
2
j
^
+
k
^
)
b. a unit vector c. indeterminate, as
[
p
q
r
]
[\mathbf{p} \mathbf{q} \mathbf{r}]
[
pqr
]
d.
−
(
i
^
−
2
j
^
+
k
^
)
/
2
-(\hat{i} - 2\hat{j} + \hat{k})/2
−
(
i
^
−
2
j
^
+
k
^
)
/2
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