Exercice :
1) Résoudre les équations suivantes
x² = 5
x³ = -7
x² = 25
x³ = 8
2) Résoudre les inéquations suivantes :
x² > 5
1
√x =
≤9
x² ≤ 16
1
> 3
√x = 7
= 10
x² > 36
1
-≤-5
√x ≥3
x
X
3) Comparer les nombres sans calculer, justifier vos réponses :
16² ... 20²
(-4)²...(-125)²
1
1
9
7
1
1
4
8
√35... √73
(-3)³ ... (-19)³
1
X
= 9
1
- = -9
X
x³ < 16
1
x
> -7
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