Quiz — 61ae177d07208199957839.pdf

Question 1 sur 5 10:00

[{"id":828,"question":"Quelle est la solution de l'équation 3x - 5 = 10 ?","option_a":"x = 5","option_b":"x = 15\/3","option_c":"x = 5\/3","option_d":"x = 15","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 3x - 5 = 10, on ajoute 5 aux deux membres (3x = 15), puis on divise par 3 (x = 5).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":829,"question":"Quelle est la forme canonique de la fonction f(x) = x² - 6x + 8 ?","option_a":"f(x) = (x - 3)² - 1","option_b":"f(x) = (x - 2)² + 4","option_c":"f(x) = (x - 3)² + 1","option_d":"f(x) = (x - 2)² - 1","option_e":"","option_f":"","bonne_reponse":"A","explication":"La forme canonique s'obtient par complétion du carré : f(x) = (x² - 6x + 9) - 1 = (x - 3)² - 1.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":830,"question":"Quel est l'aire d'un triangle de base 8 cm et de hauteur 5 cm ?","option_a":"20 cm²","option_b":"40 cm²","option_c":"13 cm²","option_d":"16 cm²","option_e":"","option_f":"","bonne_reponse":"B","explication":"L'aire d'un triangle se calcule avec la formule (base × hauteur) \/ 2 = (8 × 5) \/ 2 = 20 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":831,"question":"Si une fonction f est décroissante sur [-2 ; 3], que peut-on dire de f(-2) et f(3) ?","option_a":"f(-2) \u003C f(3)","option_b":"f(-2) \u003E f(3)","option_c":"f(-2) = f(3)","option_d":"On ne peut pas conclure","option_e":"","option_f":"","bonne_reponse":"B","explication":"Une fonction décroissante signifie que si x1 \u003C x2, alors f(x1) \u003E f(x2). Donc f(-2) \u003E f(3).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":832,"question":"Quelle est la probabilité d'obtenir un nombre pair en lançant un dé équilibré ?","option_a":"1\/6","option_b":"1\/2","option_c":"1\/3","option_d":"2\/3","option_e":"","option_f":"","bonne_reponse":"B","explication":"Un dé a 6 faces (1, 2, 3, 4, 5, 6). Les nombres pairs sont 2, 4 et 6, soit 3 cas favorables sur 6 possibles.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]