IF x/y = z/w then ( x^2 + y^2 + z^2 ) ÷ ( x^-2 + y^-2 + z^-2 + w^-2 ) is
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Step-by-step explanation:
2 + y^2 + z^2 ) ÷ ( x^-2 + y^-2 + z^-
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