Quiz — 64777bcb1728e_Enoncé- sujet 5.pdf

Question 1 sur 10 20:00

[{"id":25884,"question":"Quelle est la limite de la suite définie par uₙ = (3n² + 2n - 1)\/(2n² + 5) quand n tend vers +∞ ?","option_a":"A. 0","option_b":"B. 3\/2","option_c":"C. +∞","option_d":"D. 1","option_e":"","option_f":"","bonne_reponse":"b","explication":"La limite d'une suite rationnelle est égale au rapport des coefficients dominants des polynômes. Ici, 3\/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\": \"A. 0\", \"b\": \"B. 3\/2\", \"c\": \"C. +∞\", \"d\": \"D. 1\"}}","_debug_options_count":4},{"id":25885,"question":"Soit f une fonction dérivable sur ℝ telle que f'(x) = 2x + 1. Quelle est la primitive F de f telle que F(0) = 3 ?","option_a":"A. F(x) = x² + x + 3","option_b":"B. F(x) = x² + x","option_c":"C. F(x) = 2x² + x + 3","option_d":"D. F(x) = x² + 2x + 3","option_e":"","option_f":"","bonne_reponse":"a","explication":"La primitive de f'(x) = 2x + 1 est F(x) = x² + x + C. Avec F(0) = 3, on trouve C = 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\": \"A. F(x) = x² + x + 3\", \"b\": \"B. F(x) = x² + x\", \"c\": \"C. F(x) =","_debug_options_count":4},{"id":25886,"question":"Vrai ou Faux ? Toute fonction continue sur un intervalle fermé [a, b] est dérivable sur cet intervalle.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une fonction continue n'est pas nécessairement dérivable (exemple : f(x) = |x| en x = 0).","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":25887,"question":"Quelle est la solution de l'équation différentielle y' + 2y = 0 avec y(0) = 5 ?","option_a":"A. y(x) = 5e^(-2x)","option_b":"B. y(x) = 5e^(2x)","option_c":"C. y(x) = -2x + 5","option_d":"D. y(x) = 5e^(-x\/2)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'équation différentielle linéaire du premier ordre a pour solution y(x) = Ce^(-2x). Avec y(0) = 5, on trouve C = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"A. y(x) = 5e^(-2x)\", \"b\": \"B. y(x) = 5e^(2x)\", \"c\": \"C. y(x) = -2","_debug_options_count":4},{"id":25888,"question":"Soit X une variable aléatoire suivant une loi normale centrée réduite. Quelle est la probabilité P(-1 ≤ X ≤ 1) ?","option_a":"A. 0,3413","option_b":"B. 0,6826","option_c":"C. 0,9544","option_d":"D. 0,9974","option_e":"","option_f":"","bonne_reponse":"b","explication":"Pour une loi normale centrée réduite, environ 68,26% des valeurs sont dans l'intervalle [-1, 1].","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. 0,3413\", \"b\": \"B. 0,6826\", \"c\": \"C. 0,9544\", \"d\": \"D. 0,9974\"}","_debug_options_count":4},{"id":25889,"question":"Vrai ou Faux ? Le nombre complexe i est solution de l'équation z² + 1 = 0.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"i² = -1, donc i est bien solution de z² + 1 = 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":25890,"question":"Quelle est l'équation cartésienne de la droite passant par les points A(1, 2) et B(3, 4) ?","option_a":"A. y = x + 1","option_b":"B. y = 2x - 1","option_c":"C. y = x","option_d":"D. y = -x + 3","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le coefficient directeur est (4-2)\/(3-1) = 1. L'équation est y = x + 1 (car 2 = 1*1 + 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\": \"A. y = x + 1\", \"b\": \"B. y = 2x - 1\", \"c\": \"C. y = x\", \"d\": \"D. y ","_debug_options_count":4},{"id":25891,"question":"Soit f(x) = ln(x² + 1). Quelle est la dérivée f'(x) ?","option_a":"A. 2x\/(x² + 1)","option_b":"B. 2x","option_c":"C. 1\/(x² + 1)","option_d":"D. x\/(x² + 1)","option_e":"","option_f":"","bonne_reponse":"a","explication":"En utilisant la dérivée de ln(u) = u'\/u, avec u = x² + 1, on obtient 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\": \"A. 2x\/(x² + 1)\", \"b\": \"B. 2x\", \"c\": \"C. 1\/(x² + 1)\", \"d\": \"D. x","_debug_options_count":4},{"id":25892,"question":"Vrai ou Faux ? La fonction exponentielle est strictement croissante sur ℝ.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La dérivée de e^x est e^x \u003E 0 pour tout x, donc la fonction est strictement croissante.","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":25893,"question":"Quelle est la valeur de l'intégrale ∫₀¹ (3x² + 2x) dx ?","option_a":"A. 1","option_b":"B. 2","option_c":"C. 3","option_d":"D. 4","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'intégrale d'une somme est la somme des intégrales. ∫₀¹ 3x² dx = 1 et ∫₀¹ 2x dx = 1, donc le résultat est 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\": \"A. 1\", \"b\": \"B. 2\", \"c\": \"C. 3\", \"d\": \"D. 4\"}}","_debug_options_count":4}]