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Mathematics
Problem
Find the unit vector in the direction of the vector joining the points
P
(
2
,
−
1
,
3
)
P(2,-1,3)
P
(
2
,
−
1
,
3
)
and
Q
(
4
,
2
,
−
1
)
Q(4,2,-1)
Q
(
4
,
2
,
−
1
)
. a)
2
i
^
+
3
j
^
+
4
k
^
29
\dfrac{2\hat{i}+3\hat{j}+4\hat{k}}{\sqrt{29}}
29
2
i
^
+
3
j
^
+
4
k
^
b)
−
2
i
^
−
3
j
^
+
4
k
^
29
\dfrac{-2\hat{i}-3\hat{j}+4\hat{k}}{\sqrt{29}}
29
−
2
i
^
−
3
j
^
+
4
k
^
c)
2
i
^
+
3
j
^
−
4
k
^
29
\dfrac{2\hat{i}+3\hat{j}-4\hat{k}}{\sqrt{29}}
29
2
i
^
+
3
j
^
−
4
k
^
d)
2
i
^
+
3
j
^
−
4
k
^
29
\dfrac{2\hat{i}+3\hat{j}-4\hat{k}}{29}
29
2
i
^
+
3
j
^
−
4
k
^
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