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AP EAMCET202422 May 2024Evening ShiftMathematicsVector AlgebraActual

If the vectors a i + j +3 k , 4 i +5 j + k , and 4 i +2 j +6 k , are coplanar, then a=

Options

  1. A2
  2. B1
  3. C3
  4. D4

Correct answer

A. 2

Step-by-step solution

a i + j +3 k , 4 i +5 j + k and 4 i +2 j +6 k are coplanar then | array lll a & 1 & 3 4 & 5 & 1 4 & 2 & 6 array |=0 18 a-36=0 a=2

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