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-x-1 jika x < 1
x ≥ 1 x < 1
x+1<2 -x-1 < 1
x<1 -x < 2
x > 2
HP{1,2}
b.[x-3]<4 = x-3 jika x ≥ 3
-x+3 jika x < 3
x≥3 x < 3
x-3<4 -x + 3 < 4
x < 7 -x < 1
x > 1
HP{1,7}
c.[x+2] < [x+3]
x+2 jika x ≥ 2 dan x+3 jika x ≥ 3
-x-2 jika x < 2 dan -x-3 jika x < 3
x ≥ 2 x < 2
x+2 < x+3 -x-2 < -x-3
x-x < 3-2 -x+x < -3+2
x < 1 x < -1
jadi HP { -1 , 1}