Pertanyaan

Hasil dari 1 x - 1 y 1 x + 1 y x 1 + y 1 x 1 − y 1 adalah ....

Hasil dari $\frac{\frac{1}{x} - \frac{1}{y}}{\frac{1}{x} + \frac{1}{y}}$ adalah ....

$begin mathsize 12px style fraction numerator y minus x over denominator x y end fraction end style$
$begin mathsize 12px style fraction numerator x plus y over denominator x y end fraction end style$
$begin mathsize 12px style fraction numerator y minus x over denominator x plus y end fraction end style$
$begin mathsize 12px style fraction numerator x plus y over denominator x minus y end fraction end style$

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$begin mathsize 12px style fraction numerator begin display style 1 over x minus 1 over y end style over denominator begin display style fraction numerator begin display style 1 end style over denominator begin display style x end style end fraction plus fraction numerator begin display style 1 end style over denominator begin display style y end style end fraction end style end fraction equals fraction numerator begin display style fraction numerator y minus x over denominator x y end fraction end style over denominator begin display style fraction numerator x plus y over denominator x y end fraction end style end fraction equals fraction numerator y minus x over denominator x y end fraction space. space fraction numerator x y over denominator x plus y end fraction equals fraction numerator y minus x over denominator x plus y end fraction end style$ .