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AP EAMCET2001MathematicsMatrices

If | array cc 1-i & i 1+2 i & -i array |=x+i y , then x is equal to

Options

  1. A-2
  2. B-1
  3. C1
  4. D2

Correct answer

C. 1

Step-by-step solution

We have, aligned & | array cc 1-i & i 1+2 i & -i array |=x+i y & -i-1-i+2=x+i y & 1-2 i=x+i y & x=1, y=-2 & aligned

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