Tìm x thuộc Z: a. |x + 1| ≤ 3 b. |x|< 3 c. 2 ≤ |x – 5| < 5 d. 0 < |x + 1| ≤ 3 e. 0 <|x| <3 g. -3 ≤ |x + 1| ≤ 3 h. -2 ≤ |x – 5| ≤ 0

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