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Byju's Answer
Standard XII
Mathematics
Distance between Parallel Lines
Prove that th...
Question
Prove that the line
5
x
−
2
y
−
1
=
0
is mid-parallel to the lines
5
x
−
2
y
−
9
=
0
and
5
x
−
2
y
+
7
=
0
.
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Solution
Let lines be
l
1
=
5
x
−
2
y
−
1
=
0
l
2
=
5
x
−
2
y
−
9
=
0
l
3
=
5
x
−
2
y
+
7
=
0
Slope of
l
1
=
5
/
2
Slope of
l
2
=
5
/
2
Slope of
l
3
=
5
/
2
dist. b/w
l
1
&
l
2
=
1
−
9
+
11
√
25
+
4
=
8
√
29
dist b/w
l
1
&
l
3
=
1
−
1
−
71
√
25
+
4
=
8
√
29
Hence
l
1
is mid parallel to
l
2
&
l
3
.
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