GRE Problem Solving Question 574
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Source: Magoosh
For all numbers a and b, the operation is defined by a ⊕ b = . If xy ≠ 0, then which of the following can be equal to zero?
I. x ⊕ y
II. xy ⊕ y
III. x ⊕ (x + y)
- A II only
- B I and II only
- C I and III only
- D II and III only
- E All of the above