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Byju's Answer
Standard XII
Mathematics
Equation of a Plane : Point Normal Form
If 2,3,-1 i...
Question
If
(
2
,
3
,
−
1
)
is the foot of the perpandicular from
(
4
,
2
,
1
)
to a plane, the equation of the plane is
A
2
x
−
y
−
2
z
−
3
=
0
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B
−
2
x
+
y
−
2
z
=
1
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C
2
x
+
y
+
2
z
−
5
=
0
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D
2
x
−
y
+
2
z
+
1
=
0
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Solution
The correct option is
B
−
2
x
+
y
−
2
z
=
1
Given that,
−
−
→
A
B
=
(
−
2
,
1
,
−
2
)
−
−
→
A
B
is parallel to normal vector of plane.
π
=
−
2
(
x
−
2
)
+
y
−
3
−
2
(
z
+
1
)
=
0
Equation of plane :
−
2
x
+
y
−
2
z
=
1
Then,
We get
−
2
x
+
y
−
2
z
=
1
Option
B
is correct answer.
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Q.
Point, Plane:
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Q.
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