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Difficulty—
If \(\dfrac{2^{(x+y)^2}}{2^{(x-y)^2}}=2,\) what is the value of \(xy?\)
(A) \(-\dfrac14\)
(B) \(\dfrac12\)
(C) \(0\)
(D) \(\dfrac14\)
(E) \(\dfrac12\)
Answer: D
Source: GMAT Prep
(A) \(-\dfrac14\)
(B) \(\dfrac12\)
(C) \(0\)
(D) \(\dfrac14\)
(E) \(\dfrac12\)
Answer: D
Source: GMAT Prep
