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題:四階方陣,伴隨矩陣A*的特徵值是1,2,4,8.求(1/3A)^-1的特徵值對於四階方陣,伴隨矩陣A*=|A|A^(-1),記將其特徵值用符號k標記,對應於特徵向量d.易見|A*|=1·2·4·8,又|A*|=|A|^(4-1),故|A|=4於是有A*d=kd=|A|A^(-1…
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