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Mathematics
Problem
If two vectors
P
⃗
=
i
^
+
2
m
j
^
+
m
k
^
\vec{P} = \hat{i} + 2m\hat{j} + m\hat{k}
P
=
i
^
+
2
m
j
^
+
m
k
^
and
Q
⃗
=
4
i
^
−
2
j
^
+
m
k
^
\vec{Q} = 4\hat{i} - 2\hat{j} + m\hat{k}
Q
=
4
i
^
−
2
j
^
+
m
k
^
are perpendicular to each other. Then, the value of
m
m
m
will be : [Jan. 24, 2023 (II)] (a) 1 (b) -1 (c) -3 (d) 2
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