Quiz — Série4_corrigé.pdf

Question 1 sur 10 20:00

[{"id":79959,"question":"Quelle est la solution de l'équation 3x + 5 = 2x - 7 ?","option_a":"x = -12","option_b":"x = 12","option_c":"x = -2","option_d":"x = 2","option_e":"","option_f":"","bonne_reponse":"a","explication":"En soustrayant 2x des deux côtés, on obtient x + 5 = -7. Puis en soustrayant 5, on trouve x = -12.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"x = -12\", \"b\": \"x = 12\", \"c\": \"x = -2\", \"d\": \"x = 2\"}}","_debug_options_count":4},{"id":79960,"question":"La fonction f(x) = x² - 4x + 3 est-elle toujours positive ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Cette fonction est une parabole ouverte vers le haut avec un minimum en x=2. Elle prend des valeurs négatives entre ses racines (1 et 3).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":79961,"question":"Quel est le coefficient directeur de la droite d'équation y = 2x - 5 ?","option_a":"2","option_b":"-5","option_c":"5","option_d":"1","option_e":"","option_f":"","bonne_reponse":"a","explication":"Dans l'équation réduite y = mx + p, m représente le coefficient directeur. Ici, m = 2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"2\", \"b\": \"-5\", \"c\": \"5\", \"d\": \"1\"}}","_debug_options_count":4},{"id":79962,"question":"La probabilité d'obtenir un nombre pair en lançant un dé équilibré est-elle égale à 1\/2 ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un dé a 6 faces : 3 nombres pairs (2, 4, 6) et 3 nombres impairs. La probabilité est donc 3\/6 = 1\/2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":79963,"question":"Quelle est la dérivée de la fonction f(x) = 3x³ - 2x² + x - 1 ?","option_a":"f'(x) = 9x² - 4x + 1","option_b":"f'(x) = 6x² - 4x + 1","option_c":"f'(x) = 3x² - 2x + 1","option_d":"f'(x) = 9x² - 4x","option_e":"","option_f":"","bonne_reponse":"a","explication":"En appliquant la règle de dérivation des puissances : f'(x) = 3*3x² - 2*2x + 1 = 9x² - 4x + 1.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"f'(x) = 9x² - 4x + 1\", \"b\": \"f'(x) = 6x² - 4x + 1\", \"c\": \"f'(x)","_debug_options_count":4},{"id":79964,"question":"Le triangle ABC avec AB=5, BC=4 et AC=3 est-il rectangle ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"On vérifie avec le théorème de Pythagore : 3² + 4² = 9 + 16 = 25 = 5². Le triangle est donc rectangle en C.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":79965,"question":"Quelle est la valeur de l'intégrale ∫(2x + 1)dx entre 0 et 2 ?","option_a":"6","option_b":"5","option_c":"4","option_d":"7","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'intégrale de 2x + 1 est x² + x. En évaluant entre 0 et 2 : (4 + 2) - (0 + 0) = 6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"6\", \"b\": \"5\", \"c\": \"4\", \"d\": \"7\"}}","_debug_options_count":4},{"id":79966,"question":"La suite définie par uₙ = 2n + 1 est-elle arithmétique ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Une suite est arithmétique si la différence entre deux termes consécutifs est constante. Ici, uₙ₊₁ - uₙ = 2, donc elle est arithmétique de raison 2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":79967,"question":"Quelle est la solution de l'inéquation 2x - 3 \u003E 5x + 6 ?","option_a":"x \u003C -3","option_b":"x \u003E -3","option_c":"x \u003C 3","option_d":"x \u003E 3","option_e":"","option_f":"","bonne_reponse":"a","explication":"En soustrayant 2x et 6 des deux côtés : -9 \u003E 3x. Puis en divisant par 3 (positif) : x \u003C -3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"x \u003C -3\", \"b\": \"x \u003E -3\", \"c\": \"x \u003C 3\", \"d\": \"x \u003E 3\"}}","_debug_options_count":4},{"id":79968,"question":"La fonction exponentielle f(x) = eˣ est-elle toujours croissante ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La dérivée de eˣ est eˣ, qui est toujours positive. La fonction est donc strictement croissante sur ℝ.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4}]