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JEE Main Math Class 11 Straight Lines and Pair of Straight Lines 2 Questions
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© examsnet.com
Question : 13
Total: 88
Let a ray of light passing through the point
(
3
,
10
)
reflects on the line
2
x
+
y
=
6
and the reflected ray passes through the point
(
7
,
2
)
. If the equation of the incident ray is
a
x
+
b
y
+
1
=
0
, then
a
2
+
b
2
+
3
a
b
is equal to_.
[8 Apr 2024 Shift 2]
Your Answer:
Validate
Solution:
👈: Video Solution
For
B
′
x
−
7
2
=
y
−
2
1
=
−
2
(
14
+
2
−
6
5
)
x
−
7
2
=
y
−
2
1
=
−
4
incident ray
A
B
′
M
A
B
′
=
3
y
+
2
=
3
(
x
+
1
)
3
x
−
y
+
1
=
0
a
=
3
b
=
−
1
a
2
+
b
2
+
3
a
b
=
9
+
1
−
9
=
1
© examsnet.com
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