Решите пример
[tex]\frac{x+m}{xm}+\frac{y-m}{ym}[/tex]
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(x+m)/xm+(y-m)/ym= ((x+m)*y+(y-m)*x)/xym=(xy+my+xy-mx)/xym=(2xy+my-mx)/xymили 2/m+1/x+1/y
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