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If the operation ˆˆ is defined for all x and y by the equatio

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If the operation ^ ^ is dened for all x and y by the equation x ^ ^ y = \frac{x^2 y}{2} , then (2 ^ ^ 1) ^ ^ (2 ^ ^1) =

(A) -4
(B) -2
(C) 2
(D) 4
(E) 8

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