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A=(2+radical din 2): 2

Răspuns :

[tex]\displaystyle{ A = \frac{2+ \sqrt{2}}{2} }[/tex]

[tex]\displaystyle{ A = \frac{2}{2} + \frac{\sqrt{2}}{2} }[/tex]

[tex]\displaystyle{ A = 1 + \frac{\sqrt{2}}{2} }[/tex]