The equation of the righat bisector plane of the segment joining (2,3,4) and (6,7,8) is (A) `x+y+z+15=0` (B) `x+y+z-15=0` (C) `x-y+z-15=0` (D) none of these

The equation of the righat bisecting plane of the segment joiningteh points (a,a,a) and (-a,-a,-a),a!=0 is (A) x+y+z=a (B) x+y+z=3a (C) x+y+z=0 (D) x+y+z+a=0

The equation of y-axis are (A) x=0,y=0 (B) x=0,z=0 (C) y=0,z=0 (D) none of these

The equation of the plane whose intercepts on the axes are thrice of those made by the plane 2x-3y+6z-11=0 is (A) 6x-9y+18z-11=0 (B) 2x-3y+6z-33=0 (C) 2x-3y+6z+33=0 (D) none of these

The equation of the parallel plane lying midway between the parallel planes 2x-3y+6z-7=0 and 2x-3y+6z+7=0 is (A) 2x-3y+6z+1=0 (B) 2x-3y+6z-1=0 (C) 2x-3y+6z=0 (D) none of these

The image of plane 2x-y+z=2 in the plane mirror x+2y-z=3 is (a) x+7y-4x+5=0 (b) 3x+4y-5z+9=0 (c) 7x-y+2z-9=0 (d) None of these

The equation of the acute angle bisector of planes 2x-y+z-2=0 and x+2y-z-3=0 is x-3y+2z+1=0 (b) 3x+3y-2z+1=0 x+3y-2z+1=0 (d) 3x+y=5

Find equation of angle bisector of plane x+2y+3z-z=0 and 2x-3y+z+4=0 .

The equation of the plane containing the line 2x+z-4=0 nd 2y+z=0 and passing through the point (2,1,-1) is (A) x+y-z=4 (B) x-y-z=2 (C) x+y+z+2=0 (D) x+y+z=2

The equation of the plane through the origin and parallel to the plane 3x-4y+5z-6=0 is (A) 3x-4y-5z-6=0 (B) 3x-4y+5z+6=0 (C) 3x-4y+5z - 6=0 (D) 3x+4y-5z+6=0

for every point (x,y,z) on the y-axis: (A) x=0,y=0 (B) x=0,z=0 (C) y=0,z=0 (D) y!=0,x=0,z=0