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log cu baza 2 din 8+(1/2) la puterea -1-∛125

Răspuns :

[tex]log_28+\left(\dfrac12\right)^{-1}-\sqrt[3]{125}=log_22^3+2-\sqrt[3]{5^3}=3+2-3=2[/tex]

Am folosit:  [tex]\left(\dfrac ab\right)^{-n}=\left(\dfrac ba\right)^{n}[/tex]