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log indice 2 (x²+4) = log indice 2 exponent 8


Răspuns :


[tex] log_{2}( x^{2} +4)= log_{2}8 [/tex]
[tex] x^{2} +4=8[/tex]
[tex] x^{2} =4[/tex]
[tex]x=2;x=-2 [/tex]