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JEE Main2013MathematicsVector AlgebraActual

The vector ( i a b ) i +( j a b ) j +( k a b ) k is equal to:

Options

  1. Ab a
  2. Ba
  3. Ca b
  4. Db

Correct answer

C. a b

Step-by-step solution

( i a b ) i +( j a b ) j +( k a b ) k =( i a b ) i +( j a b ) j +( k a b ) k ( a b c = a b c )=( a b ) i +( a b ) j +( a b ) k == a b

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