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Mapel : Matematika Wajib (Kelas X SMA)Materi : Nilai Mutlak
Indikator : Mencari HP dalam suatu pertidaksamaan nilai mutlak
Langkah Penyelesaian dan Jawaban :
|3 - 2x| < 4,
- Gunakan sifat :
|f(x)| < a , maka f(x) < a atau f(x) > - a
3 - 2x < 4
- 2x < 4 - 3
- 2x < 1
x > - 1/2
3 - 2x > - 4
- 2x > - 4 - 3
- 2x > - 7
x < 7/2
Kombinasikan :
HP = {x | - 1/2 < x < 7/2, x ∈ R}