Nomor 10 bagaimana?

Bab Nilai Mutlak
Matematika SMA Kelas X

10] |(x + 1)/2| < 1

(x + 1)/2 < 1
x + 1 < 1 . 2
x < 2 - 1
x < 1

(x +1)/2 > -1
x + 1 > - 1 . 2
x > -2 - 1
x > -3
-3 < x

HP = { x | -3 < x < 1, x ∈ bilangan real }