HSC Science (General) 12th Board ExamMaharashtra State Board
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# Solution for Find the equations of the planes parallel to the plane x-2y + 2z-4 = 0, which are at a unit distance from the point (1,2, 3). - HSC Science (General) 12th Board Exam - Mathematics and Statistics

ConceptPlane Equation of a Plane Passing Through Three Non Collinear Points

#### Question

Find the equations of the planes parallel to the plane x-2y + 2z-4 = 0, which are at a unit distance from the point (1,2, 3).

#### Solution

The equation of the planes parallel to the plane x −2y + 2z − 4 = 0
are of the form x-2y+2z+k=0

The distance of a plane ax+by+cz+ λ from a point  (x1,y1,z1)  is given by

d=|(9ax_1+by_1+cz_1+lambda)/sqrt(a^2+b^2+c^2)|

It is given the plane x-2y+2z+k=0 at an unit distance from the point (1, 2, 3).

d=|(1-2(2)+2(3)+k)/(sqrt(1^2+(-2)^2)+(2)^2)|

1=|(k+3)/3|

∴ |k+3|=|3|
∴ k=0 or k=-6
The equation of the planes parallel to the plane x-2y+2z-4=0
are of x-2y+2z=0 and x-2y+2z=6

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#### APPEARS IN

2014-2015 (March) (with solutions)
Question 3.2.2 | 4.00 marks

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Solution for question: Find the equations of the planes parallel to the plane x-2y + 2z-4 = 0, which are at a unit distance from the point (1,2, 3). concept: Plane - Equation of a Plane Passing Through Three Non Collinear Points. For the courses HSC Science (General) , HSC Arts, HSC Science (Computer Science), HSC Science (Electronics)
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