Exercice 1)
a. 0 est-il un nombre réel?
b. Donner deux nombres irrationnels.
c. Donner un encadrement décimal à 1 près de t.

Exercice 2)
Vrai ou Faux ?
Indiquer si les affirmations suivantes sont vraies ou fausses, puis
justifier.
a.Tout nombre rationnel est un nombre réel.
b. Il existe des nombres réels qui ne sont pas des nombres
décimaux.
c. Le carré d'un nombre irrationnel est irrationnel.

By: USER6985
26 Agustus 2025 mathematiques 5 minutes
4.5
475 views 475 comments 13 shares
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Question

Grade: Education Subject: mathematiques
Exercice 1)
a. 0 est-il un nombre réel?
b. Donner deux nombres irrationnels.
c. Donner un encadrement décimal à 1 près de t.

Exercice 2)
Vrai ou Faux ?
Indiquer si les affirmations suivantes sont vraies ou fausses, puis
justifier.
a.Tout nombre rationnel est un nombre réel.
b. Il existe des nombres réels qui ne sont pas des nombres
décimaux.
c. Le carré d'un nombre irrationnel est irrationnel.
Asked by:
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Answer (475)

Best Answer
(325)

39

1. 0 appartient à N et N est inclus dans R. Donc 0 appartient à R et est réel.

2. Racine(2) et racine(5)

3. Un encadrement à 1 près de 1 est 0<1<2.

40

1. Vrai car Q est inclus dans R

2. Vrai, 1/3 par exemple

3. Faux, racine(3) au carré = 3 est naturel donc rationnel.

Answered on 26 Agustus 2025

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