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E(x)=(1/6-1/3x):x²-4/2x²+4x

Răspuns :

E(x)=(1/6-1/3x):(x²-4)/(2x²+4x)=
=
(x-2)/6x:(x-2)(x+2)/2x(x+2)=
=2x/6x =2/6=1/3