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Mathematics
Problem
Three lines are given as follows: L₁:
2
x
−
3
y
+
4
=
0
2x - 3y + 4 = 0
2
x
−
3
y
+
4
=
0
L₂:
4
x
−
6
y
−
5
=
0
4x - 6y - 5 = 0
4
x
−
6
y
−
5
=
0
L₃:
3
x
+
2
y
−
7
=
0
3x + 2y - 7 = 0
3
x
+
2
y
−
7
=
0
Which pair of lines is (are) perpendicular? a)
(
L
1
,
L
2
)
only
(L_1, L_2) \text{ only}
(
L
1
,
L
2
)
only
b)
(
L
1
,
L
3
)
and
(
L
2
,
L
3
)
(L_1, L_3) \text{ and } (L_2, L_3)
(
L
1
,
L
3
)
and
(
L
2
,
L
3
)
c)
(
L
1
,
L
3
)
only
(L_1, L_3) \text{ only}
(
L
1
,
L
3
)
only
d)
(
L
2
,
L
3
)
only
(L_2, L_3) \text{ only}
(
L
2
,
L
3
)
only
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