[中學] 矩陣運算
設 A,B,I,O 均為 2 階方陣,O 為零矩陣,I 為單位矩陣
若 A 不等於 I 且 A^3 = I 則 A^2 + A + I = O
只能舉例說明對錯,還是有別的方法?謝謝 ~~~
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