Canonical URI: https://w3id.org/kmath/textbook_solution/visang_solution_p155_p124_01
| rdf:type | math:TextbookSolution |
|---|---|
| rdfs:label | 비상 p124 문제 09 풀이 |
| rdfs:comment | 비상 공통수학1 정답 및 해설 p155의 p124 문제 09 풀이. |
| math:answerText | (1) \(AB\ne BA\) (2) \(AB=O\) |
| math:explanationText | (1) \[ AB= \begin{pmatrix}1&0\\2&3\end{pmatrix} \begin{pmatrix}0&2\\-1&1\end{pmatrix} = \begin{pmatrix}0&2\\-3&7\end{pmatrix} \] \[ BA= \begin{pmatrix}0&2\\-1&1\end{pmatrix} \begin{pmatrix}1&0\\2&3\end{pmatrix} = \begin{pmatrix}4&6\\1&3\end{pmatrix} \] 따라서 \(AB\ne BA\) (2) \[ AB= \begin{pmatrix}3&2\\9&6\end{pmatrix} \begin{pmatrix}-2&6\\3&-9\end{pmatrix} = \begin{pmatrix}0&0\\0&0\end{pmatrix} \] 따라서 \(AB=O\) |
| math:mappingConfidence | 1.0 |
| math:pageStart | 155 |
| math:problem | textbook_problem:visang_vision_p124_01 |
| math:reviewStatus | reviewed |
| math:solutionKind | worked_solution |
| math:usesSolutionPattern | solution_pattern:matrix_product_row_column |