急求:用正交线性替换化下列二次型为典范性f(x1,x2,x3)=x1*2+2x2*2+3x3*2-4x1x2-4x2x3(注:x1中的1为下标)
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![急求:用正交线性替换化下列二次型为典范性f(x1,x2,x3)=x1*2+2x2*2+3x3*2-4x1x2-4x2x3(注:x1中的1为下标)](/uploads/image/z/9449659-19-9.jpg?t=%E6%80%A5%E6%B1%82%EF%BC%9A%E7%94%A8%E6%AD%A3%E4%BA%A4%E7%BA%BF%E6%80%A7%E6%9B%BF%E6%8D%A2%E5%8C%96%E4%B8%8B%E5%88%97%E4%BA%8C%E6%AC%A1%E5%9E%8B%E4%B8%BA%E5%85%B8%E8%8C%83%E6%80%A7f%28x1%2Cx2%2Cx3%29%3Dx1%2A2%2B2x2%2A2%2B3x3%2A2-4x1x2-4x2x3%28%E6%B3%A8%EF%BC%9Ax1%E4%B8%AD%E7%9A%841%E4%B8%BA%E4%B8%8B%E6%A0%87%29)
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