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Verified answer
Materi : Nilai MutlakBahasan : Pertidaksamaan Nilai Mutlak
Jawaban : HP = {x | - 1/2 < x < 7/2, x ∈ R}
Langkah - langkah :
|f(x)| < a, maka f(x) < a atau f(x) > - a
|3 - 2x| < 4, maka 3 - 2x < 4 atau 3 - 2x > - 4
⇒ 3 - 2x < 4
- 2x < 4 - 3
- 2x < 1
x > - 1/2
atau,
3 - 2x > - 4
- 2x > - 4 - 3
- 2x > - 7
x < 7/2
Kombinasikan pertidaksamaan tersebut,
HP = {x | - 1/2 < x < 7/2, x ∈ R}