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MHT CET202014 Oct 2020Morning ShiftMathematicsThree Dimensional GeometryActual

If the lines given by r =2 + ( +2 +m k ) and r = + (2 + +6 k ) are perpendicular, then the value of m is

Options

  1. A3 2
  2. B-3 2
  3. C2 3
  4. D-2 3

Correct answer

D. -2 3

Step-by-step solution

Given lines are er and their d.r.s. are (1,2, ~m ) and (2,1,6) 1(2)+2(1)+m(6)=0 6 m=-4 m= -2 3

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