Odpowiedź:
zad. 3
[tex]\frac{1}{1-\sqrt5}} =\frac{1*(1+\sqrt{5})}{(1-\sqrt{5})(1+ \sqrt{5})} = \frac{1+\sqrt{5}}{1+5} = \frac{1+\sqrt{5}}{6}[/tex]
Zad. 4
4 |x - 2| = 8
4 |x - 2| = 8 v 4 |x - 2| = -8
4x - 8 = 8 v 4x - 8 = -8
4x = 16 v 4x = 0
x = 4 v x = 0
