Respostas

2013-09-02T01:35:25-03:00
│4 x + 2│ ≤ ½, então:
-½ ≤ 4x + 2 ≤ ½

4x + 2 ≤ 1/2 => 4x ≤ 1/2 - 2 => 4x ≤ -3/2 => x ≤ -3/8
-1/2 ≤ 4x + 2 => -1/2 - 2 ≤ 4x => -5/2 ≤ 4x => -5/8 ≤ x

Portanto, -5/8 ≤ x ≤ -3/8.
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