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Deepak Patra posted an Question
March 15, 2022 • 02:35 am 30 points
  • IIT JAM
  • Mathematics (MA)

If a and b are 2x2 matrix and ab=l then does it implies that a and b are invertible?????

if A and B are 2x2 matrix and AB=l then does it implies that A and B are invertible?????

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    Deepak patra

    sir if AB=l but BA=\I ... in this case also A and B are invertible ???

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    invertable

  • Anonymous User Best Answer

    AB=I then B=A^-1 and A=B^-1 A and B is invertable

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