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Mathematics
Mathematics
Problem
The vertices of triangle are
A
(
1
,
1
,
2
)
A(1, 1, 2)
A
(
1
,
1
,
2
)
,
B
(
4
,
3
,
1
)
B(4, 3, 1)
B
(
4
,
3
,
1
)
and
C
(
2
,
3
,
5
)
C(2, 3, 5)
C
(
2
,
3
,
5
)
. A vector representing the internal bisector of the triangle A is a.
i
+
j
+
2
k
i + j + 2 k
i
+
j
+
2
k
b.
2
i
−
2
j
+
k
2 i - 2 j + k
2
i
−
2
j
+
k
c.
2
i
+
2
j
+
k
2 i + 2 j + k
2
i
+
2
j
+
k
d. None of these
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