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Most Important Selected Qs for JEE AdvancedMathematicsThree Dimensional Geometry

If the coordinates of the point where the line x-2 y+z-1=0=x+2 y-2 z-5 intersects the plane x+y-2 z=7 is ( , , ) , then:

Options

  1. A+ + =7
  2. B- + +1=0
  3. C^2+ ^2+ ^2=21
  4. D+ + =2

Correct answer

D. + + =2

Step-by-step solution

The required point of intersection of three planes Solving eqns. (1), (2) and (3), we get (1,-2,-4) .

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