| x | < 3 = | x | > 2 = | 3 x + 3 | = | 2 x -2 | > 4 =
Matematika
NATaufik
Pertanyaan
| x | < 3 =
| x | > 2 =
| 3 x + 3 | =
| 2 x -2 | > 4 =
| x | > 2 =
| 3 x + 3 | =
| 2 x -2 | > 4 =
1 Jawaban
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1. Jawaban ErikCatosLawijaya
Materi : Pertidaksamaan Mutlak
Pembahasan :
|x| < 3
x² < 3²
x² - 3² < 0
(x + 3)(x - 3) < 0
-3 < x < 3
Hp : {-3 < x < 3}
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|x| > 2
x² > 2²
x² - 2² > 0
(x + 2)(x - 2) > 0
x < -2 atau x > 2
Hp : {x < -2 atau x > 2}
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|2x - 2| > 4
|x - 1| > 2
(x - 1)² > 2²
(x - 1)² - 2² > 0
(x - 1 + 2)(x - 1 - 2) > 0
(x + 1)(x - 3) > 0
x < -1 atau x > 3
Hp : {x < -1 atau x > 3}