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Nomor 2.
Nomor 3.
Nomor 4.
Nomor 5.
Dengan bilangan bulat:
HP = {x | -1,0,1,2,3,4}
Nomor 6.
-3 ≤ x-7 ≤ 5
-3+7 ≤ x-7+7 ≤ 5+7
4 ≤ x ≤ 12
Maka,
HP = {x | 4,5,6,7,8,9,10,11,12}
Nomor 7.
4½ < x + ½ < 8
4½-½ < x < 8 - ½
4 < x < 7½
HP = {x | 5,6,7}
Nomor 8.
Maka,
HP = {x | ..., 3,4,5,6,7}