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Aflati x: a)8^x•16=128
b) (2-x)•(x-4)


Răspuns :

8^x×16=128 8^x=128/16=8 Se aplica log in baza 8 daca ai invatat Log8(8^x)=log8(8) Daca nu 8^1=8^x X=1 (2-x)(x-4)=2x-8-x^2+4x=6x-8-x^2