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Scusate riuscite a risolvere questa espressione.. grazie [attach]67753[/attach]

marimarilu · Accepted Answer

[attach]67755[/attach]

gramor · Answer

[attach]67761[/attach] ======================================================== ( frac {5}{2})^{-1}÷ left [( frac {5}{2})^8÷( frac {5}{2})^6 right ]=$ $= ( frac {5}{2})^{-1}÷ left [( frac {5}{2})^{8-6} right ]=$ $= ( frac {5}{2})^{-1}÷( frac {5}{2})^2=$ $= ( frac {5}{2})^{-1-2}=$ $= ( frac {5}{2})^{-3}=$ $= ( frac {2}{5})^3=$ $=  dfrac {8}{125}

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