Question

Efetue a operação indicada
x+1/x-1 - x-1/ x+1

Answer 1

[(x + 1) / (x - 1)]  -  [(x - 1)/(x +1)] = 

mmc = (x+1)*(x-1) = (x² - 1)

[(x + 1) * (x +1)] / (x² - 1) - [(x -1) * (x -1)]/ (x² - 1)

[(x + 1)² / (x² - 1)] - [(x -1)²/ (x² - 1)]

{[x² + 2x + 1] - [x² - 2x + ]}/(x² - 1)

4x/(x² -1)

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10/12/2015
Sepauto - SSRC
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