Question

1/27 < 3^(2−x) ≤ 3
17 балів даю

Answer 1

1/27 < 3^(2−x) ≤ 3

3^(-3) < 3^(2−x) ≤ 3^1

-3 < 2−x ≤ 1

1 ≤ х < 5