Ответ:

В решении.

Объяснение:

1.

Найти знаменатель прогрессии q:

bn = b₁ * qⁿ⁻¹;

b₁ = 6;

b₅ = 2/27;

b₅ = b₁ * q⁴;

q⁴ = b₅/b₁

q⁴ = 2/27 : 6

q⁴ = 2/162 = 1/81;

q = 1/3;

b₂ = b₁ * q

b₂ = 6 * 1/3

b₂ = 2;

b₃ = b₁ * q²

b₃ = 6 * 1/9

b₃ = 2/3;

b₄ = b₁ * q³

b₄ = 6 * 1/27

b₄ = 2/9.

2.

Найти знаменатель прогрессии q:

bn = b₁ * qⁿ⁻¹;

b₁ = 6;

b₅ = 3/8;

b₅ = b₁ * q⁴;

q⁴ = b₅/b₁

q⁴ = 3/8 : 6

q⁴ = 3/48 = 1/16;

q = 1/2;

b₂ = b₁ * q

b₂ = 6 * 1/2

b₂ = 3;

b₃ = b₁ * q²

b₃ = 6 * 1/4

b₃ = 3/2;

b₄ = b₁ * q³

b₄ = 6 * 1/8

b₄ = 6/8 = 3/4.