CHALLENGE Which expression is not equivalent to the reciprocal of x 2 - 4y _ 2 x + 2y

Chapter 11, Problem 38

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CHALLENGE Which expression is not equivalent to the reciprocal of x 2 - 4y _ 2 x + 2y ? Justify your answer. a. _1 x 2 - 4y _ 2 x + 2y b. _-1 2y - x c. _1 x - 2y d. _1 x - _1 2y

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