Ubah bentuk nilai mutlak |x-1| ...

Pembahasan :

Definisi :

|x| = x, jika x ≥ 0

|x| = -x, jika x < 0

x - 1 ≥ 0 => x ≥ 1

2x - 6 ≥ 0 => 2x ≥ 6 => x ≥ 3

jika x ≥ 1
|x - 1| = x - 1
jika x < 1
|x - 1| = -(x - 1) = -x + 1