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AP EAMCET201823 Apr 2018Evening ShiftMathematicsVector AlgebraActual

If a , b , c are three vectors such that | a |=1,| b |=2,| c |=3 and 2 a b = b c = c a =2 , Then, [ a b c ]^2=

Options

  1. A15
  2. B14
  3. C12
  4. D8

Correct answer

A. 15

Step-by-step solution

[ a b c ]^2= | array lll a b & a b & a c b a & b b & b c c a & c b & c c array |= | array lll 1 & 1 & 2 1 & 4 & 2 2 & 2 & 9 array |=15

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