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Mathematics
Mathematics
Problem
If the vectors
p
i
^
+
j
^
+
k
^
p\hat{i} + \hat{j} + \hat{k}
p
i
^
+
j
^
+
k
^
,
i
^
+
q
j
^
+
k
^
\hat{i} + q\hat{j} + \hat{k}
i
^
+
q
j
^
+
k
^
and
i
^
+
j
^
+
r
k
^
\hat{i} + \hat{j} + r\hat{k}
i
^
+
j
^
+
r
k
^
(Where,
p
≠
q
≠
r
≠
1
p \neq q \neq r \neq 1
p
=
q
=
r
=
1
) are coplanar, then the value of
p
q
r
−
(
p
+
q
+
r
)
pqr - (p + q + r)
pq
r
−
(
p
+
q
+
r
)
is a. -2 b. 2 c. 0 d. -1
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