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AP EAMCET2004MathematicsMatrices

The rank of [ array ccc 1 & -1 & 1 1 & 1 & -1 -1 & 1 & 1 array ] is

Options

  1. A0
  2. B1
  3. C2
  4. D3

Correct answer

D. 3

Step-by-step solution

aligned & Let A= [ array ccc 1 & -1 & 1 1 & 1 & -1 -1 & 1 & 1 array ] & |A|=1(1+1)+1(1-1)+1(1+1) & =4 0 & aligned Rank of matrix A is 3 .

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