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21-06-2019
Mathematics

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If x + y = 12 and xy = -5, calculate the value of 1/x + 1/y.

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konrad509 konrad509

21-06-2019

[tex]\dfrac{1}{x}+\dfrac{1}{y}=\dfrac{y}{xy}+\dfrac{x}{xy}=\dfrac{x+y}{xy}=\dfrac{12}{-5}=-\dfrac{12}{5}=-2,4[/tex]

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