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Mathematics
Problem
The vectors
A
B
=
3
i
^
+
4
k
^
\mathbf{AB} = 3\hat{i} + 4\hat{k}
AB
=
3
i
^
+
4
k
^
and
A
C
=
5
i
^
−
2
j
^
+
4
k
^
\mathbf{AC} = 5\hat{i} - 2\hat{j} + 4\hat{k}
AC
=
5
i
^
−
2
j
^
+
4
k
^
are the sides of a
Δ
A
B
C
\Delta ABC
Δ
A
B
C
. The length of the median through
A
A
A
is a.
18
\sqrt{18}
18
b.
72
\sqrt{72}
72
c.
33
\sqrt{33}
33
d.
288
\sqrt{288}
288
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