Odpowiedź:
a₃ = a₁q² = 24
a₆ = a₁q⁵ = 9
a₆/a₃ = a₁q⁵/a₁q² = q⁵⁻² = q³
q³ = 24/9 = 8/3
q = ∛(8/3) = 2/∛9 = 2∛3/∛(9 * 3) = 2∛3/∛27 = 2∛3/3
a₁q² = 24
a₁ = 24 : q² = 24 : (2∛3/3)² = 24 : 4∛3²/9 = 24 * 9/4∛9 = 24 * 9∛3/∛(9 * 3) =
= 216∛3/∛27 = 216∛3/3 = 72∛3
