oblicz trzeci i piaty wyraz ciagu geometrycznego (an) w ktorym a1=2 q=\sqrt{5}
oblicz wartosc wyrazenia (2-3\sqrt{5})^{2}
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a3=2*qdo2
a3=2-5do2
a3=50
a5=2-qdo4
a5=2-5do4
a5=6250