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Calculati:
(1/rad2+1)^2+(1/rad2-1)^2+1/2

Răspuns :

 [tex](1/\sqrt2 + 1)^2+(1/\sqrt2-1)^2+1/2=\\ =1/2+\not2/\sqrt2+1 + 1/2-\not2/\sqrt2+1 + 1/2 =\\ =1/2+1+1/2+1+1/2=3\frac{1}{2}=3,5[/tex]

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