Réponse :
13 a) x² = 100 b) x² 16 c) x² > 3 d) 16 < x² < 100
x = = 10 x x > 4 < x < 10
x 4
e) 1 x² < 5 ↔ 1 x <
14 a) x² b) x² > 25 c) < x² < 25 d) x² > -1
x x > 5 < x < 5 ∅
x
e) 5x² + 7 1
5x² - 6
x² ≥
∅
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Réponse :
13 a) x² = 100 b) x² 16 c) x² > 3 d) 16 < x² < 100
x = = 10 x x > 4 < x < 10
x 4
e) 1 x² < 5 ↔ 1 x <
14 a) x² b) x² > 25 c) < x² < 25 d) x² > -1
x x > 5 < x < 5 ∅
x
e) 5x² + 7 1
5x² - 6
x² ≥
∅