Question

Область определения функции

Answer 1

-1 ≤ (12 - 2x)/5 ≤ 1

-5 ≤ 12 - 2x ≤ 5

-5 - 12 ≤ -2x ≤ 5 - 12

-17 ≤ -2x ≤ -7

17 ≥ 2x ≥ 7

7 ≤ 2x ≤ 17

7/2 ≤ x ≤ 17/2

3,5 ≤ x ≤ 8,5

x ∈ [3,5; 8,5]