Quiz — Ex12-7-c.pdf

Question 1 sur 10 20:00

[{"id":17929,"question":"Quelle est la dérivée de la fonction f(x) = 3x² + 2x - 5 ?","option_a":"6x + 2","option_b":"3x² + 2","option_c":"6x - 5","option_d":"6x + 2x - 5","option_e":"","option_f":"","bonne_reponse":"a","explication":"La dérivée de 3x² est 6x, celle de 2x est 2, et celle de -5 est 0. Donc f'(x) = 6x + 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\": \"6x + 2\", \"b\": \"3x² + 2\", \"c\": \"6x - 5\", \"d\": \"6x + 2x - 5\"}}","_debug_options_count":4},{"id":17930,"question":"L'intégrale de f(x) = 2x entre 0 et 3 est égale à 9.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'intégrale de 2x est x². Calculée entre 0 et 3, on obtient 3² - 0² = 9. L'affirmation est donc vraie.","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":17931,"question":"Quelle est la limite de la suite uₙ = (2n + 1)\/(n + 3) quand n tend vers l'infini ?","option_a":"2","option_b":"1","option_c":"0","option_d":"3","option_e":"","option_f":"","bonne_reponse":"b","explication":"En divisant le numérateur et le dénominateur par n, on obtient (2 + 1\/n)\/(1 + 3\/n). Quand n tend vers l'infini, 1\/n et 3\/n tendent vers 0, donc la limite est 2\/1 = 2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"2\", \"b\": \"1\", \"c\": \"0\", \"d\": \"3\"}}","_debug_options_count":4},{"id":17932,"question":"La probabilité conditionnelle P(A|B) est définie par :","option_a":"P(A ∩ B)\/P(B)","option_b":"P(A) + P(B)","option_c":"P(A) * P(B)","option_d":"P(B)\/P(A ∩ B)","option_e":"","option_f":"","bonne_reponse":"a","explication":"Par définition, P(A|B) = P(A ∩ B)\/P(B), à condition que P(B) ≠ 0.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"P(A ∩ B)\/P(B)\", \"b\": \"P(A) + P(B)\", \"c\": \"P(A) * P(B)\", \"d\": \"P","_debug_options_count":4},{"id":17933,"question":"La fonction f(x) = x³ - 3x² + 2x est croissante sur l'intervalle [-1, 1].","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La dérivée f'(x) = 3x² - 6x + 2. Sur [-1, 1], f'(x) change de signe (ex. f'(-1) = 11 \u003E 0, f'(0) = 2 \u003E 0, f'(1) = -1 \u003C 0). La fonction n'est donc pas croissante sur tout l'intervalle.","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":17934,"question":"Quelle est l'aire sous la courbe de f(x) = e^x entre x=0 et x=1 ?","option_a":"e - 1","option_b":"1","option_c":"e","option_d":"e + 1","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'intégrale de e^x est e^x. Calculée entre 0 et 1, on obtient e¹ - e⁰ = e - 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\": \"e - 1\", \"b\": \"1\", \"c\": \"e\", \"d\": \"e + 1\"}}","_debug_options_count":4},{"id":17935,"question":"La suite uₙ = 1\/n converge vers 0 quand n tend vers l'infini.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Pour tout ε \u003E 0, il existe N tel que pour n \u003E N, |1\/n| \u003C ε. Donc la suite converge bien vers 0.","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":17936,"question":"Quelle est la dérivée de la fonction f(x) = ln(x² + 1) ?","option_a":"2x\/(x² + 1)","option_b":"1\/(x² + 1)","option_c":"2x * ln(x² + 1)","option_d":"2\/(x² + 1)","option_e":"","option_f":"","bonne_reponse":"a","explication":"En utilisant la formule de dérivation des fonctions composées, f'(x) = (2x)\/(x² + 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\": \"2x\/(x² + 1)\", \"b\": \"1\/(x² + 1)\", \"c\": \"2x * ln(x² + 1)\", \"d\": ","_debug_options_count":4},{"id":17937,"question":"L'intégrale de f(x) = sin(x) entre 0 et π est égale à 2.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'intégrale de sin(x) est -cos(x). Calculée entre 0 et π, on obtient -cos(π) - (-cos(0)) = -(-1) - (-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":17938,"question":"Quelle est la probabilité d'obtenir un nombre pair en lançant un dé équilibré ?","option_a":"1\/6","option_b":"1\/3","option_c":"1\/2","option_d":"2\/3","option_e":"","option_f":"","bonne_reponse":"c","explication":"Les nombres pairs sur un dé sont 2, 4 et 6. Il y a donc 3 issues favorables sur 6 possibles, soit une probabilité de 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\": \"c\", \"options\": {\"a\": \"1\/6\", \"b\": \"1\/3\", \"c\": \"1\/2\", \"d\": \"2\/3\"}}","_debug_options_count":4}]