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FILA A x < 0 ¨¨ x > 4 - 1 < x £ 0 ¨¨ 2 £ x £ 4 x > 1 x <- 2 x £- 2 False FILA B x < 0 ¨¨ x > 9 - 2 < x £ 0 ¨¨ 3 £ x £ 4 x >- 1 x <- 3 x £- 3 False

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FILA A

x < 0 »» x > 4

−1 < x ≤ 0 »» 2 ≤ x ≤ 4

x > 1

x < −2

x ≤ −2

False

FILA B

x < 0 »» x > 9

−2 < x ≤ 0 »» 3 ≤ x ≤ 4

x > −1

x < −3

x ≤ −3

False