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Using properties of determinants, prove that: 1 1+3y 1 1 1 1+ 3z 1+3x 1 1 = 9(3xyz + xy + yz + zx)

Using properties of determinants, prove that:

1 1+3y 1 1 1 1+ 3z 1+3x 1 1 = 9(3xyz + xy + yz + zx)

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