Выберите верные равенства
А) [tex] (x+y)^{-2} [/tex]=[tex] x+2x^{-1} y^{-1}+y^{-2}[/tex]
Б) [tex](x^{-1}+y^{-1})^{2}=x^{-2}+2x^{-1}y^{-1}+y^{-2}[/tex]
B) [tex](x^{-1}-y^{-1})^{3}=x^{-3}-3x^{-1}y^{-2}-y^{-3}[/tex]
Г) [tex](x^{-1}-y^{-1})^{-2}=x^{2}+2xy+y^{2}[/tex]
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