Quiz : Maîtrisez les bases des mathématiques en 3ème année secondaire

Question 1 sur 10 10:00

[{"id":78152,"question":"Quelle est la solution de l'équation x² - 5x + 6 = 0 ?","option_a":"x = 2 ou x = 3","option_b":"x = -2 ou x = -3","option_c":"x = 1 ou x = 6","option_d":"x = 0 ou x = 5","option_e":"","option_f":"","bonne_reponse":"A","explication":"Les solutions sont obtenues en factorisant l'équation : (x-2)(x-3)=0.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":78153,"question":"La dérivée de f(x) = 3x² + 2x - 1 est f'(x) = 6x + 2.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La dérivée est bien f'(x) = 6x + 2, car la dérivée de x² est 2x et celle de x est 1.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":78154,"question":"Quel est le résultat de √(16) + √(9) ?","option_a":"7","option_b":"5","option_c":"10","option_d":"12","option_e":"","option_f":"","bonne_reponse":"A","explication":"√(16) = 4 et √(9) = 3, donc 4 + 3 = 7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":78155,"question":"Le théorème de Pythagore s'applique uniquement aux triangles isocèles.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le théorème de Pythagore s'applique à tous les triangles rectangles, quelle que soit leur forme.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":78156,"question":"Quelle est la forme factorisée de x² - 9 ?","option_a":"(x-3)(x+3)","option_b":"(x-9)(x+1)","option_c":"(x-3)²","option_d":"(x+3)²","option_e":"","option_f":"","bonne_reponse":"A","explication":"x² - 9 est une différence de carrés : (x-3)(x+3).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":78157,"question":"La fonction f(x) = 2x + 5 est-elle croissante ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La fonction affine f(x) = 2x + 5 a un coefficient directeur positif (2), donc elle est croissante.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":78158,"question":"Quel est le résultat de (3x² + 2x) - (x² - 4x) ?","option_a":"2x² + 6x","option_b":"4x² - 2x","option_c":"2x² - 2x","option_d":"4x² + 6x","option_e":"","option_f":"","bonne_reponse":"A","explication":"On soustrait les termes semblables : (3x² - x²) + (2x + 4x) = 2x² + 6x.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":78159,"question":"La probabilité d'obtenir un nombre pair en lançant un dé est 1\/2.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Il y a 3 nombres pairs (2,4,6) sur 6 faces, donc la probabilité est 3\/6 = 1\/2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":78160,"question":"Quelle est la valeur de x dans l'équation 4x - 7 = 13 ?","option_a":"x = 5","option_b":"x = 4","option_c":"x = 6","option_d":"x = 3","option_e":"","option_f":"","bonne_reponse":"A","explication":"4x = 20 ⇒ x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":78161,"question":"Le cosinus d'un angle aigu est toujours inférieur à 1.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le cosinus d'un angle aigu est compris entre 0 et 1, donc toujours inférieur à 1.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]