-7 ≤ (2x + 1 )/ 2 < 2<br>-7 * 2 ≤ 2x + 1 < 2 * 2<br>-14 ≤ 2x + 1 < 4
-14 -1 ≤ 2x < 4 -1
-15 ≤ 2x < 3
-15/2 ≤ x < 3/2
-7,5 ≤ x < 1,5
Проверка
при x = -7,5:
-7 ≤ (2* (-7,5) + 1 )/ 2 < 2<br>-7 ≤ (-15 + 1 )/ 2 < 2<br>-7 ≤ -14/ 2 < 2<br>-7 ≤ -7 < 2 - истинно<br>при x = 1:
-7 ≤ (2* 1 + 1 )/ 2 < 2<br>-7 ≤ (2 + 1 )/ 2 < 2<br>-7 ≤ 3/ 2 < 2<br>-7 ≤ 1,5 < 2 - истинно<br>