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KCET2023MathematicsDeterminants

If A= [ array cc 2-k & 2 1 & 3-k array ] is singular matrix, then the value of 5 k-k^2 is equal to

Options

  1. A-6
  2. B-4
  3. C6
  4. D4

Correct answer

D. 4

Step-by-step solution

A= [ array cc 2-k & 2 1 & 3-k array ] is singular matrix we know that A is singular matrix, then |A|=0|A|=(2-k)(3-k)-2

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