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You're not using Matrix (sympy) but matrix (numpy) A = Matrix( [[a1,a2,a3],[b1,b2,b3],[c1,c2,c3]]) # Creates a matrix. B = Matrix( [[x],[y],[z]]). ... <看更多>

For 3x3, it's lot more complicated but there is a pattern. As usual compute the determinant first (kind of a pain; but surely you already know the pattern ... ... <看更多>