...求一个正交变换x=Py,把二次型f(x1,x2,x3)化为标准型
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发布时间：2024-10-23 11:22
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时间：2024-10-30 08:02
由 .A?λE.=.4?λ0003?λ202?λ.=（4-λ）[（-λ）（3-λ）-4]=0，
解得 λ1=λ2=4，λ3=-1
λ1=λ2=4时，解方程（A-4E）x=0，
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时间：2024-10-30 08:03
由 .A?λE.=.4?λ0003?λ202?λ.=（4-λ）[（-λ）（3-λ）-4]=0，
解得 λ1=λ2=4，λ3=-1
λ1=λ2=4时，解方程（A-4E）x=0，
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