[中學] 克拉馬公式
如題,
| a1 b1 c1 |
Δ= | a2 b2 c2 |
| a3 b3 c3 |
| d1 b1 c1 |
Δx= | d1 b2 c2 |
| d1 b3 c3 |
如何向高中生解釋,
為何Δ=> Δx ,
就是將a1,a2,a3代換成d1,d2,d3??
口試被問到,當場傻眼-_-
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