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不知道你是求B=1/(2A*)+3E還是B=(1/2)A*+3E? 這種題型你可以根據伴隨矩陣的性質來求解,A*=|A|A的逆,再根據行列式與矩陣特徵值的關係求出|A|的值為6,A的逆的特徵值由A的特徵值可以求得,分別是1、1/2、1/3,最後帶入原式即可. 前一個式子的特徵值等於37/12,19/6,13/4 後一個式子的特徵值等於6、9/2、4
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