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Sa se rezolve in multimea R [tex] 2^{3-x} = \frac{1}{4} [/tex]

Răspuns :

   
[tex]\displaystyle \\ 2^{3-x} = \frac{1}{4} \\ \\ \\ 2^{3-x} = \frac{1}{2^2} \\ \\ 2^{3-x} = 2^{-2}\\ \\ 3-x = -2 \\ \\ x = 3+2 \\ \\ \boxed{x=5}[/tex]