The three numbers ,

MATHEMATICS · Subjective · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

The three numbers xx, yy, and zz satisfy x>y>z>0x>y>z>0. Show that if 1x\frac{1}{x}, 1y\frac{1}{y}, and 1z\frac{1}{z} are consecutive terms of an arithmetic sequence, then x−zx-z, yy, and x−y+zx-y+z can be the side lengths of a right-angled triangle.

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