Bonjour,
1. ∣2−3∣⩽2
∣-1∣⩽2
faux
2. ∣2−3∣<1
∣-1∣<1
vrai
3. ∣2+3∣⩽2
∣5∣⩽2
4. ∣2−2∣<1
∣0∣<1
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Bonjour,
1. ∣2−3∣⩽2
∣-1∣⩽2
faux
2. ∣2−3∣<1
∣-1∣<1
vrai
3. ∣2+3∣⩽2
∣5∣⩽2
faux
4. ∣2−2∣<1
∣0∣<1
vrai