BITSAT2014MathematicsThree Dimensional GeometryActual
The equation of the right bisector plane of the segment joining (2,3,4) and (6,7,8) is
Options
- Ax+y+z+15=0
- Bx+y+z-15=0
- Cx-y+z-15=0
- DNone of these
Correct answer
B. x+y+z-15=0
Step-by-step solution
If the given points be A(2,3,4) and B(6,7,8), then their mid-point N (4,5,6) must lie on the plane. The direction ratios of AB are 4,4,4, i.e. 1,1,1 The required plane passes through N (4,5,6) and is normal to AB . Thus its equation is 1(x-4)+1(y-5)+1(z-6)=0 x+y+z=15