用正交变化将二次型f=-3X2^2-3X3^2-4X1X2+4X1X3+8X2X3化为标准型,写出郑炯矩阵和标准型.
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![用正交变化将二次型f=-3X2^2-3X3^2-4X1X2+4X1X3+8X2X3化为标准型,写出郑炯矩阵和标准型.](/uploads/image/z/5201858-2-8.jpg?t=%E7%94%A8%E6%AD%A3%E4%BA%A4%E5%8F%98%E5%8C%96%E5%B0%86%E4%BA%8C%E6%AC%A1%E5%9E%8Bf%3D-3X2%5E2-3X3%5E2-4X1X2%2B4X1X3%2B8X2X3%E5%8C%96%E4%B8%BA%E6%A0%87%E5%87%86%E5%9E%8B%2C%E5%86%99%E5%87%BA%E9%83%91%E7%82%AF%E7%9F%A9%E9%98%B5%E5%92%8C%E6%A0%87%E5%87%86%E5%9E%8B.)
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