Mohon bantuannya dong..

Bab Nilai Mutlak
Matematika SMA Kelas X

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

x + 1/2 < 1/2
x < 1/2 - 1/2
x < 0

atau

x + 1/2 > -1/2
x > -1/2 - 1/2
x > -1
-1 < x

HP = { x | -1 < x < 0, x € bilangan real }