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q=3
a5=18*3=54
a2*3=6
a2=2
a1*3=2
a1=2/3
Odp. 2/3, 2, 6, 18, 54.
2.
q²=-12:(-3)=4
q=-2 v q=2
Odp. x=03*(-2)=6 lub x=-3*2=-6.