" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
-4-3 < -2x < 4 -3
-7 < -2x < 1
-7/2 > x > -1/2
.
b)
|2x +5| ≥ 9
-9≥2x+5 ≥9
-9 - 5 ≥ 2x ≥ 9-5
-14 ≥ 2x ≥ 4
-7 ≥ x ≥ 2
- 4 < 3 - 2x < 4
- 7 < - 2x < 4
- 2x > - 7 atau - 2x < 4
x < 7/2 x > - 2
- 2 < x < 7/2
B) |x/2 + 5| ≥ 9
x/2 + 5 ≥ 9 atau x/2 + 5 ≤ - 9
x/2 ≥ 4 x/2 ≤ - 14
x ≥ 8 x ≤ - 28