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- |x+2| < 3
- se x+2 > 0
- x+2 < 3
- quindi
- x < 1
- se x+2 < 0
- -(x+2) < 3
- quindi
- x > -5
- ----
- |x+2| < 3 verificata se e solo se (x > -5) V (x < 1)
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