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Byju's Answer
Standard XII
Mathematics
Section Formula
A line passes...
Question
A line passes through the points whose position vectors are
^
i
+
^
j
−
2
^
k
and
^
i
−
3
^
j
+
^
k
. The position vector of a point on it at unit distance from the first point is
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Solution
A
(
1
,
1
,
−
2
)
B
(
1
,
−
3
,
1
)
E
q
u
a
t
i
o
n
o
f
l
i
n
e
t
h
r
o
u
g
h
A
a
n
d
B
x
−
1
0
=
y
−
1
4
=
z
+
2
−
3
P
(
1
,
4
r
+
1
,
−
3
r
−
2
)
P
A
=
1
√
(
4
r
)
2
+
(
−
3
r
)
2
=
1
5
|
r
|
=
1
r
=
±
1
5
r
=
1
5
,
P
(
1
,
9
5
,
−
13
5
)
r
=
−
1
5
,
P
(
1
,
1
5
,
−
7
5
)
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Similar questions
Q.
A line passes through the points whose position vectors
^
i
+
^
j
−
2
^
k
and
^
i
−
3
^
j
+
^
k
. Then the position vector of a point on it at a unit distance from the first point is
Q.
A unit vector perpendicular to the plane passing through the points whose position vectors are
^
i
−
^
j
+
2
^
k
,
2
^
i
−
^
k
and
2
^
j
+
^
k
is
Q.
The position vectors of two points
A
and
B
are respectively
^
i
+
^
j
−
2
^
k
and
^
i
−
3
^
j
+
^
k
. The position vector of point
C
on
A
B
such that
A
C
=
15
unit can be
Q.
A line passes through the point with position vector
3
^
i
and is parallel to the vector
−
^
i
+
^
j
+
^
k
and another line passes through the point with position vector
^
i
+
^
j
and is parallel to the vector
^
i
+
^
k
then they intersect at the point with position vector
Q.
Given
→
α
=
3
^
i
+
^
j
+
2
^
k
,
→
β
=
^
i
−
2
^
j
−
4
^
k
are the position vectors of the points
A
and
B
. Then the distance of the point
−
^
i
+
^
j
+
^
k
from the passing through
B
and perpendicular to
A
B
is
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