Question

E(x)= (3-$\frac{1}{x}$):$\frac{9 x^{2} -1}{3 x^{2} +x}$, unde x ∈R \{ $- \frac{1}{3} ,0, \frac{1}{3}$} . Aratati ca E(x)=1,pentru orice x ∈R \{ $- \frac{1}{3} ,0, \frac{1}{3}$} .

Answer 1

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