Let x, y, z be positive real numbers such that x, y, z are in GP and ^ -1 x, ^ -1 y and ^ -1 z are in AP. Then which one of the following is correct?

NDA 2017 Mathematics question

Let x, y, z be positive real numbers such that x, y, z are in GP and , and are in AP. Then which one of the following is correct?

Answer: (A)

GP: . AP: . Since ,

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Question ID VK-028618