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If \(|x| = |y|\) and \(xy = 0,\) which of the following must be true?
A \(xy^2 > 0\)
B. \(x^2y > 0 \)
C. \(x+y=0\)
D. \(\dfrac{x}{y+1}=2\)
E. \(\dfrac1{x}+\dfrac1{y}=\dfrac12\)
[spoiler]OA=C[/spoiler]
Source: GMAT Prep
A \(xy^2 > 0\)
B. \(x^2y > 0 \)
C. \(x+y=0\)
D. \(\dfrac{x}{y+1}=2\)
E. \(\dfrac1{x}+\dfrac1{y}=\dfrac12\)
[spoiler]OA=C[/spoiler]
Source: GMAT Prep
