Question

найдите знаменатель геомеирической прогресии (сn) если c7= 54 и c5= 6​

Answer 1

c₇ =54

c₅ = 6

$:\left \{ {{c_{1}*q^{6}=54} \atop {c_{1}*q^{4}=6}} \right. \\------\\q^{2}=9\\\\q_{1}=-3\\\\q_{2}=3$