If x,y,z are positive real numbers, show that x-1y×y-1z×z-1x=1.

If x,y,z are positive real numbers, show that $\sqrt{x^{- 1} y} \times \sqrt{y^{- 1} z} \times \sqrt{z^{- 1} x} = 1$ .

Match the items on the right to the items on the left.

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