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Byju's Answer
Standard XII
Mathematics
Test for Collinearity of Vectors
If P⃗O⃗ +O⃗...
Question
If
→
P
O
+
→
O
Q
=
→
Q
O
+
→
O
R
, show that the points
P
,
Q
,
R
are collinear.
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Solution
REF.Image
(
a
−
b
)
∥
(
a
−
c
)
(
a
−
b
)
=
K
(
a
−
c
)
→
P
Q
+
→
Q
O
=
→
Q
C
+
→
O
R
→
O
Q
−
→
O
P
=
→
O
R
−
→
O
Q
→
O
Q
−
→
O
P
→
a
−
→
b
=
−
1
(
→
O
Q
−
→
O
R
)
K
(
→
a
−
→
c
)
(
→
O
Q
−
→
O
P
)
∥
(
→
O
Q
−
→
O
R
)
∴
P
,
Q
,
R
lies on the same line on
collinear.
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Similar questions
Q.
If
→
P
O
+
→
O
Q
=
→
Q
O
+
→
O
R
, prove that the points
P
,
Q
,
R
are collinear.
Q.
For
O
being the origin and
3
points
P
,
Q
and
R
lie on a plane. If
→
P
O
+
→
O
Q
=
→
Q
O
+
→
O
R
, then
P
,
Q
,
R
are
Q.
Let
O
be the origin and
P
,
Q
,
R
be the points such that
→
P
Q
+
→
O
Q
=
→
Q
O
+
→
O
R
.
Then which one of the following is correct ?
Q.
A, B , C are the points (a, p), (b,q) and (c,r) respectively such that a, b, c are in A. P. and p, q ,r in G.P. If the points are collinear then prove that p = q = r
Q.
Using distance formula show that the points
P
(
2
,
4
,
6
)
,
Q
(
–
2
,
–
2
,
–
2
)
and
R
(
6
,
10
,
14
)
are collinear.
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