Question

Va rog ,rpd imi trebuie ex 5!!

Answer 1

$\displaystyle E(x)= \frac{x^2+4x+4}{x(x+2)} :(1+ \frac{2}{x} ) \\ \\ E(x)= \frac{(x+2)^2}{x(x+2)} : \frac{x+2}{x} \\ \\ E(x)= \frac{x+2}{x} \cdot \frac{x}{x+2} \\ \\ E(x)=1$