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Matrix Trace - Class XII

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Multiple Choice

 For what value of
k, the matrix $A = \begin{bmatrix} 4 & 3 -k\\ 1 & 2 \end{bmatrix}$ is
not invertible?

  1. (a)$k = -5,$
  2. (b)$k=5,$
  3. (c)$k=0$
  4. (d)$k=3$
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