Mathematics

Mathematics

Problem

Prove that: a−1a−1+b−1+a−1a−1−b−1=2b2b2−a2\frac{a^{-1}}{a^{-1} + b^{-1}} + \frac{a^{-1}}{a^{-1} - b^{-1}} = \frac{2b^2}{b^2 - a^2}

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