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統計: A(6), B(22), C(70), D(15), E(0) #296447
統計: A(6), B(22), C(70), D(15), E(0) #296447
詳解 (共 1 筆)
#925052
取行列式
| -1 3 |
| X | = -12
| 2 6 |
| -12 | = 12
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