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The ray of light comes along the lines L...

The ray of light comes along the lines L=0 and strikes the plane mirror kept along the plane P=0 at B. `A(2, 1, 6)` is a point on the line L=0 whose image about P=0 is A'. It is given that L=0 is `(x-2)/(3)=(y-1)/(4)=(z-6)/(5) and P=0 is x+y-2z=3`.
Q. The equation of reflected line is:

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The ray of light comes along the lines L=0 and strikes the plane mirror kept along the plane P=0 at B. A(2, 1, 6) is a point on the line L=0 whose image about P=0 is A'. It is given that L=0 is (x-2)/(3)=(y-1)/(4)=(z-6)/(5) and P=0 is x+y-2z=3 . Q. The coordinates of B are

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