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最佳答案:|a b c |D=|e f g | =afk+bgi+cej-cfi-agj-bek|i j k ||d b c |X= |h f g |=dfk+bgl+c
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最佳答案:a1*x + b1*y + c1*z +d1 = 0a2*x + b2*y + c2*z +d2 = 0a3*x + b3*y + c3*z +d3 = 0a1
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最佳答案:a1*x + b1*y + c1*z +d1 = 0a2*x + b2*y + c2*z +d2 = 0a3*x + b3*y + c3*z +d3 = 0a1