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JEE Main Math Class 12 Three Dimensional Geometry Part 3 Questions
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© examsnet.com
Question : 38
Total: 134
Let
(
α
,
β
,
γ
)
be mirror image of the point
(
2
,
3
,
5
)
in the line
x
−
1
2
−
y
−
2
3
−
z
−
3
4
.
Then
2
α
+
3
β
+
4
γ
is equal to
[31-Jan-2024 Shift 2]
32
33
31
34
Validate
Solution:
👈: Video Solution
∵
→
PR
⟂
(
2
,
3
,
4
)
∴
→
PR
⋅
(
2
,
3
,
4
)
=
0
(
α
−
2
,
β
−
3
,
γ
−
5
)
⋅
(
2
,
3
,
4
)
=
0
⇒
2
α
+
3
β
+
4
γ
=
4
+
9
+
20
=
33
© examsnet.com
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