Quiz Mathématiques : 2ème année secondaire — Révision des fondamentaux

Question 1 sur 10 10:00

[{"id":71502,"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":"En ajoutant 5 des deux côtés, on obtient 3x = 15, puis en divisant par 3, x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":71503,"question":"Le théorème de Pythagore s'applique uniquement aux triangles rectangles.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le théorème de Pythagore est valable uniquement pour les triangles rectangles.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":71504,"question":"Quelle est l'image de -2 par la fonction f(x) = 2x + 1 ?","option_a":"f(-2) = -3","option_b":"f(-2) = -4","option_c":"f(-2) = 5","option_d":"f(-2) = -1","option_e":"","option_f":"","bonne_reponse":"A","explication":"En remplaçant x par -2, on obtient f(-2) = 2*(-2) + 1 = -4 + 1 = -3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":71505,"question":"La fonction linéaire est représentée par une droite passant par l'origine.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Une fonction linéaire f(x) = ax passe toujours par l'origine du repère (0,0).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":71506,"question":"Quel est le coefficient directeur de la droite d'équation y = 4x - 7 ?","option_a":"4","option_b":"-7","option_c":"7","option_d":"0","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le coefficient directeur est le nombre devant x, ici 4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":71507,"question":"Dans un triangle ABC, si AB = 5 cm, BC = 12 cm et AC = 13 cm, alors ce triangle est rectangle.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"On vérifie : 5² + 12² = 25 + 144 = 169 = 13². Le triangle est donc rectangle en B.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":71508,"question":"Quelle est la solution de l'inéquation 2x + 3 \u003E 7 ?","option_a":"x \u003E 2","option_b":"x \u003E 5","option_c":"x \u003C 2","option_d":"x \u003C 5","option_e":"","option_f":"","bonne_reponse":"A","explication":"En soustrayant 3, on obtient 2x \u003E 4, puis en divisant par 2, x \u003E 2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":71509,"question":"La fonction f(x) = x² est-elle paire ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Une fonction est paire si f(-x) = f(x). Ici, f(-x) = (-x)² = x² = f(x).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":71510,"question":"Quel est le périmètre d'un carré de côté 4 cm ?","option_a":"16 cm","option_b":"8 cm","option_c":"4 cm","option_d":"32 cm","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le périmètre d'un carré est 4 fois la longueur d'un côté : 4 * 4 = 16 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":71511,"question":"La droite d'équation y = -3x + 2 est-elle décroissante ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le coefficient directeur est -3 (négatif), donc la droite est décroissante.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]