12. Let P be the image of the point (3, 1,7) with respect to the plane...

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12. Let P be the image of the point (3, 1,7) with respect to the plane x-y+z= 3. Then the equation of the plane passing through P and containing the straight line == is 1 2 1 a. x+y-3z=0 b. 3x+z=0 Cx- 4y + 7z = 0 d. 2r-y = 0 12. Let P be the image of the point (3, 1,7) with respect to the plane x-y+z= 3. Then the equation of the plane passing through P and containing the straight line == is 1 2 1 a. x+y-3z=0 b. 3x+z=0 Cx- 4y + 7z = 0 d. 2r-y = 0