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a₆=a₁q⁵
a₃=a₁q²
a₆/a₃=q³
-24/-3=q³
q³=8
q=2
a₃=a₁q₂
a₁=a₃/q²
a₁=-3/4
b)a6=1 a8=9
a₆=a₁q⁵
a₈=a₁q⁷
a₈/a₆=q²
q²=9
q=-3 lub q=3
dla q=-3
a₁=a₆/q⁵
a₁=1/-243=-1/243
dla q=3
a₁=a₆/q⁵
a₁=1/-43=1/243