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Let P= [ array cc 3 & -5 7 & -12 array ] and Q= [ array cc 12 & -5 7 & -3 array ] then the matrix (P Q)⁻¹ is

Options

  1. ANilpotent
  2. BIdempotent
  3. Cinvolutory
  4. DSymmetric

Correct answer

D. Symmetric

Step-by-step solution

PQ = [ array ll 1 & 0 0 & 1 array ]

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