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If A= [ array cc & 2 2 & array ] and det (A^3 )=125 , then is equal to

Options

  1. A1
  2. B2
  3. C3
  4. D5

Correct answer

C. 3

Step-by-step solution

aligned & A = [ array ll & 2 2 & array ], det ( A ^3 )=125 & | ~A ^3 |=125 | ~A |=5 & ^2-4=5 ^2=9 = 3 aligned

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