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MHT CET202020 Oct 2020Evening ShiftMathematicsVector AlgebraActual

If a = + j + k , b =2 -2 +2 k , c =2 +3 +2 k are any three co-planar vectors such that l a +m b +n c = 0 , then values of l, m, n are respectively

Options

  1. A10, 1, 4
  2. B10,-4,1
  3. C10, -1,-4
  4. D10,1,-4

Correct answer

C. 10, -1,-4

Step-by-step solution

array l a = + + k b =2 -2 +2 k c =2 +3 +2 k x a +y b = c array By solving all eq"s we get x=+ 5 2 ; y=- 1 4 10 a - b -4 c =0

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