Cho A = A−1⋅(1 1 1 2 1 1 1 2 1 3 1 3). Tìm .A^-1 ?
11/30
Cho A = \[{A^{ - 1}} \cdot \left( {\begin{array}{*{20}{c}}{11}&{12}&{11}\\{12}&{13}&{13}\end{array}} \right)\]. Tìm .A^-1 ?
A= \[{A^{ - 1}} \cdot \left( {\begin{array}{*{20}{c}}1&1&1\\1&2&1\\1&1&2\end{array}} \right)\]
\[{A^{ - 1}} \cdot \left( {\begin{array}{*{20}{c}}1&{ - 1}&1\\1&2&1\\1&1&2\end{array}} \right)\]
\[{A^{ - 1}} \cdot \left( {\begin{array}{*{20}{c}}1&1&1\\1&{ - 2}&1\\1&1&2\end{array}} \right)\]
\[{A^{ - 1}} \cdot \left( {\begin{array}{*{20}{c}}1&1&1\\1&2&1\\1&{ - 1}&2\end{array}} \right)\]
Giải thích
Chọn đáp án A