Cofactor Matrix to Adjoint (3x3) - Full Matrix

Question

Which is the adjoint of this cofactor matrix? The adjoint is the transpose of the cofactor matrix: $	ext{adj}(A) = C^{T}$.

$$\left[ {\begin{array} {ccc}  2 &  1 &  6 \ -1 &  8 &  7 \ -7 &  6 &  7 \end{array}  } ight]$$

Accepted Answer

$$\left[ {\begin{array} {ccc}  2 &  -1 &  -7 \ 1 &  8 &  6 \ 6 &  7 &  7 \end{array}  } ight]$$

Answer

$$\left[ {\begin{array} {ccc}  2 &  -1 &  -7 \ 1 &  8 &  6 \ 6 &  6 &  7 \end{array}  } ight]$$

Answer

$$\left[ {\begin{array} {ccc}  2 &  -1 &  -7 \ 1 &  11 &  6 \ 6 &  7 &  8 \end{array}  } ight]$$

Answer

$$\left[ {\begin{array} {ccc}  2 &  -1 &  -7 \ 1 &  8 &  6 \ 9 &  7 &  7 \end{array}  } ight]$$

Practice: Matrices - Cofactor Matrix to Adjoint (3x3) - Full Matrix