Question

(1+1/2x+1)×(2-1/x+1)

Answer 1

Răspuns:

$(1+\frac{1}{2x+1})\cdot (2-\frac{1}{x+1}) = (\frac{2x+1}{2x+1}+\frac{1}{2x+1})\cdot (\frac{2x+2}{x+1}-\frac{1}{x+1})=\frac{2x+2}{2x+1}\cdot \frac{2x+1}{x+1} =\frac{2x+2}{x+1}=2$.