[tex]\frac{( \frac{1}{2})^{-1}-5}{2^{-2}-(\frac{2}{3})^{-2}}= \frac{ 2-5}{( \frac{1}{2})^{ 2}-(\frac{3}{2})^{ 2}}= \frac{ -3}{ \frac{1}{4} - \frac{9}{4} }=\frac{-3}{-\frac{8}{4}}=\frac{3}{2}\\\\\\liczba\ odwrtotna\ do\ liczby\ \ \frac{3}{2}\ \ to\ \ \frac{2}{3}\\\\odp.\ \ A[/tex]
