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(1+1/2x+1)×(2-1/x+1)

Răspuns :

Răspuns:

[tex] (1+\frac{1}{2x+1})\cdot (2-\frac{1}{x+1}) = (\frac{2x+1}{2x+1}+\frac{1}{2x+1})\cdot (\frac{2x+2}{x+1}-\frac{1}{x+1})=\frac{2x+2}{2x+1}\cdot \frac{2x+1}{x+1} =\frac{2x+2}{x+1}=2 [/tex].