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For matrix A = \(\begin{bmatrix} 2 & 5 \\[0.3em] -11 & 7 \end{bmatrix}\),(adj A)' is is equal to :A = [(2,5)(-11,7)](a) \(\begin{bmatrix} -2 & -5 \\[0.3em] 11 & -7 \end{bmatrix}\) (b) \(\begin{bmatrix} 7 & 5 \\[0.3em] 11 & 2 \end{bmatrix}\) (c) \(\begin{bmatrix} 7 & 11 \\[0.3em] -5 & 2 \end{bmatrix}\)(d) \(\begin{bmatrix} 7 & -5 \\[0.3em] 11 & 2 \end{bmatrix}\) |
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Answer» Option : (c) adj A = \(\begin{bmatrix} 7& -5 \\[0.3em] -11 & 2 \end{bmatrix}\) ⇒ (adj A)' = \(\begin{bmatrix} 7& 11 \\[0.3em] -5 & 2 \end{bmatrix}\) |
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