Question

Problema E(x)

Trebuie sa dea 1-x/1-2x

Answer 1

[tex]E(x)=\left(\dfrac{x}{x+1}+1\right):\left(1-\dfrac{3x^2}{1-x^2}\right)\\ E(x)=\dfrac{2x+1}{x+1}:\dfrac{1-4x^2}{1-x^2}\\ E(x)=\dfrac{2x+1}{x+1}\cdot \dfrac{(1+x)(1-x)}{(1-2x)(1+2x)}\\ E(x)=\dfrac{1-x}{1-2x},\forall x\in \mathbb{R}-\left\{\pm 1,\pm \dfrac{1}{2}\right\}[/tex]