5 uždavinys

4 uždavinys6 uždavinys

Sprendimas:

 23+3=\frac{2}{3+\sqrt {3}} =    2(33)(3+3)(33)=\frac{2\cdot (3-\sqrt {3})}{(3+\sqrt {3})\cdot (3-\sqrt {3})} =    2(33)3232=\frac{2\cdot (3-\sqrt {3})}{3^{2}-\sqrt {3}^{2}} =     2(33)93=\frac{2\cdot (3-\sqrt {3})}{9-3} =    2(33)6=\frac{2\cdot (3-\sqrt {3})}{6} =     333\frac{3-\sqrt {3}}{3}

Atsakymas: B  333\frac{3-\sqrt {3}}{3}

4 uždavinys6 uždavinys