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Byju's Answer
Standard IX
Mathematics
Number Line
r⃗⃗1⃗=î+ĵ+2k̂...
Question
→
r
1
=
^
i
+
^
j
+
2
^
k
+
λ
(
3
^
i
−
2
^
j
+
4
^
k
)
→
r
2
=
2
^
i
+
^
j
+
3
^
k
+
μ
(
−
6
^
i
+
4
^
j
−
8
^
k
)
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Solution
→
r
1
is parallel to
3
^
i
−
2
^
j
+
4
^
k
→
r
2
is parallel to
−
6
^
i
+
4
^
j
−
8
^
k
Hence,
→
r
2
=
−
2
→
r
1
So, the two vectors are parallel and thus the lines are parallel and non- intersecting.
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Similar questions
Q.
Find out whether the following pair of lines are parallel, non-parallel & intersecting, or non-parallel & non-intersecting.
→
r
1
=
^
i
+
^
j
+
2
^
k
+
λ
(
3
^
i
−
2
^
j
+
4
^
k
)
→
r
2
=
2
^
i
+
^
j
+
3
^
k
+
μ
(
−
6
^
i
+
4
^
j
−
8
^
k
)
.
Q.
→
r
1
=
^
i
−
^
j
+
3
^
k
+
λ
(
^
i
−
^
j
+
^
k
)
→
r
2
=
2
^
i
+
4
^
j
+
6
^
k
+
μ
(
2
^
i
+
^
j
+
3
^
k
)
Q.
If
→
r
1
=
2
^
i
+
4
^
j
,
→
r
2
=
^
i
+
4
^
j
−
2
^
k
and
→
r
3
=
^
i
+
^
j
+
^
k
, then
→
r
3
as linear combination of
→
r
1
,
→
r
2
is
Q.
→
r
1
=
^
i
+
^
k
+
λ
(
^
i
+
3
^
j
+
4
^
k
)
→
r
2
=
2
^
i
+
3
^
j
+
μ
(
4
^
i
−
^
j
+
^
k
)
Q.
Which of the following is true for lines
→
r
1
=
(
^
i
+
2
^
j
−
3
^
k
)
+
s
(
3
^
i
+
^
j
−
^
k
)
and
→
r
2
=
(
4
^
i
+
^
j
−
^
k
)
+
t
(
2
^
i
−
^
j
+
3
^
k
)
.
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