Question
If xy + yz + zx = 0, then $$\left( {\frac{1}{{{x^2} - yz}} + \frac{1}{{{y^2} - zx}} + \frac{1}{{{z^2} - xy}}} \right)$$ $$\left( {x,y,z \ne 0} \right) = ?$$
Answer: Option D
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