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MHT CET2008MathematicsVector Algebra

a [ a ( a b )] is equal to

Options

  1. A( a a ) ( b a )
  2. Ba ( b a )- b ( a b )
  3. C[ a ( a b )] a
  4. D( a a )( b a )

Correct answer

D. ( a a )( b a )

Step-by-step solution

aligned a [ a & ( a b )] &= a ( a b ) a -( a a ) b &=( a b )( a a )-( a a )( a b ) &=( a b ) 0+( a a )( b a ) &=( a a )( b a ) aligned

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