Question

Помогите умоляюююю не хочу 2​​

Answer 1

Бесконечно убывающая прогрессия это та, у которой |q| < 1.

2) q = 1/9 / 1/3 = 3/9 = 1/3; |1/3| < 1

4) q = -8 / -16 = 1/2; |1/2| < 1

6) q = 6 / 8 = 3/4; |3/4| < 1

2) b11 = b7 * q⁴

3/4 = 12 * q⁴

q⁴ = 1/16 → |q| = 1/2 → |1/2| < 1 → да

4) b9 = b5 * q⁴

-1/27 = -9 * q⁴

q⁴ = 1/3⁵ → |q| = (1/3)^(5/4) → |q| < 1 → да