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winno być a5 = 256
a3 = a1 q²,
a5 = a1 q⁴
a5/a3 = (a1q⁴)/(a1q²) = q²
q² = 256/16 = 16
q = √16 = 4
a3 = a1 q² ---------> a1 = a3 / q²
a1 = 16/ 16 = 1
Odp. a1 = 1 , iloraz q = 4