Tentukan himpunan penyelesaian dari -1 < |4-5x| < 10! Jawab:
Materi : Konsep Mutlak
-1 < |4 - 5x| < 10
(1) -1 < f(x) < 10
-1 < 4 - 5x < 10
0 < - 5x < 10 - 4 - 1
0 < - 5x < 5
-5 < 5x < 0
-1 < x < 0
(2) -1 < - f(x) < 10
-1 < 5x - 4 < 10
0 < 5x < 10 + 4 - 1
0 < 5x < 13
0 < x < 13/5
HP = { x | -1 < x < 0 atau 0 < x < 13/5 }
Semoga bisa membantu
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