ISRO Electronics & Communication (ECE) 2008 - Question 80

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Topic: Engineering Mathematics

The matrix $A=\begin{bmatrix}-4&-3&-3\\ 1&0&1\\ 4&4&x\end{bmatrix}$ is its own adjoint. The value of x will be

  • A. 5
  • B. 3
  • C. -3
  • D. -5

Answer: B. 3

Explanation: Compare original matrix A with Adj A, then $x=3$

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