Tick O the correct answer-1 x-1 y 1 x-1 y-a 1 - 2-1 y 2b 1 x 2-1 y 2c 1 x 2-1 y 2-1 xyd 1 x 2-1 y 2-1 x y

A) 1x2 1y2 1x+1y1x 1y #8658;According #160;to #160;the #160;formula #160;a+ba b=a2 b2: #8658;1x2 1y2(1x2 minus;1y2) ...

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Tick O the co...

Question

Tick (✓) the correct answer:
$(\frac{1}{x} + \frac{1}{y}) (\frac{1}{x} - \frac{1}{y}) = ?$
(a) $(\frac{1}{x^{2}} - \frac{1}{y^{2}})$
(b) $(\frac{1}{x^{2}} + \frac{1}{y^{2}})$
(c) $(\frac{1}{x^{2}} + \frac{1}{y^{2}} - \frac{1}{x y})$
(d) $(\frac{1}{x^{2}} - \frac{1}{y^{2}} + \frac{1}{x y})$

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