The equation of the planes passing through the line of intersection of the planes 3x-y-4z=0 and x+3y+6=0 whose distance from the origin is 1 , are
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a
x-2 y-2 z-3=0,2 x+y-2 z+3=0
b
x-2 y+2 z-3=02 x+y+2 z+3=0
c
x+2 y-2 z-3=0,2 x+y-2 z+3=0
d
None of these
answer is A.
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Detailed Solution
Equation of planes passing through line of intersection of two planes is 3x−y−4z+λx+3y+6=03+λx+3λ−1y−4z+6λ=0Given the distance of plane from orgin is 1∴6λ(3+λ)2+(3λ−1)2+(−4)2=1⇒λ=±1Therefore, the equation of the planes are 2x−4y−4z−6=0 ie; x−2y−2z−3=0and 4x+2y-4z+6=0 ie; 2x+y-2z+3=0