ОЕ
Оо Ее
Ответ
b3 = b1*q^(3-1) = 4,8 => b1 = 4,8/q^2
b6 = b1*q^(6-1) = 38,4 => b1 = 38,4/q^5
=>
4,8/q^2 = 38,4/q^4
4,8*q^5 = 38,8*q^2
q^3 = 38,8/4,8 = 8
q^3 = 2^3
q = 2 =>
b1 = 4,8/q^2 = 4,8/2^2 = 4,8/4 = 1,2