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Mathematics
Mathematics
Problem
The vector
b
=
k
i
^
+
2
j
^
+
3
k
^
\mathbf{b}=k\hat i+2\hat j+3\hat k
b
=
k
i
^
+
2
j
^
+
3
k
^
is perpendicular to
a
=
i
^
+
4
j
^
−
2
k
^
\mathbf{a}=\hat i+4\hat j-2\hat k
a
=
i
^
+
4
j
^
−
2
k
^
. Find the value of
k
k
k
. a)
2
2
2
b)
−
2
-2
−
2
c)
−
6
-6
−
6
d)
0
0
0
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