1、设A是4阶矩阵,特征值为1,2,-2,3,求det(A^3-2A^2-2A-3E) 2、二次型f(X1,X2,X3)=(X^T)AX,经正交1、设A是4阶矩阵,特征值为1,-2,求det(A^3-2A^2-2A-3E)2、二次型f(X1,X2,X3)=(X^T)AX,经正交线性替换X=QY后,
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![1、设A是4阶矩阵,特征值为1,2,-2,3,求det(A^3-2A^2-2A-3E) 2、二次型f(X1,X2,X3)=(X^T)AX,经正交1、设A是4阶矩阵,特征值为1,-2,求det(A^3-2A^2-2A-3E)2、二次型f(X1,X2,X3)=(X^T)AX,经正交线性替换X=QY后,](/uploads/image/z/10880402-50-2.jpg?t=1%E3%80%81%E8%AE%BEA%E6%98%AF4%E9%98%B6%E7%9F%A9%E9%98%B5%2C%E7%89%B9%E5%BE%81%E5%80%BC%E4%B8%BA1%2C2%2C-2%2C3%2C%E6%B1%82det%28A%5E3-2A%5E2-2A-3E%29+2%E3%80%81%E4%BA%8C%E6%AC%A1%E5%9E%8Bf%EF%BC%88X1%2CX2%2CX3%EF%BC%89%3D%28X%5ET%29AX%2C%E7%BB%8F%E6%AD%A3%E4%BA%A41%E3%80%81%E8%AE%BEA%E6%98%AF4%E9%98%B6%E7%9F%A9%E9%98%B5%EF%BC%8C%E7%89%B9%E5%BE%81%E5%80%BC%E4%B8%BA1%2C-2%2C%E6%B1%82det%28A%5E3-2A%5E2-2A-3E%292%E3%80%81%E4%BA%8C%E6%AC%A1%E5%9E%8Bf%EF%BC%88X1%EF%BC%8CX2%EF%BC%8CX3%EF%BC%89%3D%28X%5ET%29AX%EF%BC%8C%E7%BB%8F%E6%AD%A3%E4%BA%A4%E7%BA%BF%E6%80%A7%E6%9B%BF%E6%8D%A2X%3DQY%E5%90%8E%EF%BC%8C)
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