Oblicz:
a)[/tex]
(3/7)^{-2}*(9/49)^{-2}=(7/3)^2*(49/9)^2=(7/3)^2*(7/3)^4=49/9*2401/81=117649/729=161 i 280/729
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(3/7)^{-2}*(9/49)^{-2}=(7/3)^2*(49/9)^2=(7/3)^2*(7/3)^4=49/9*2401/81=117649/729=161 i 280/729