Quiz — ist fmm cor 2015.pdf

Question 1 sur 10 20:00

[{"id":9403,"question":"Quelle est la limite de la fonction f(x) = (2x² + 3x - 5)\/(x² - 1) lorsque x tend vers l'infini ?","option_a":"A. 2","option_b":"B. -5","option_c":"C. 0","option_d":"D. +∞","option_e":"","option_f":"","bonne_reponse":"a","explication":"La limite d'un quotient de polynômes de même degré est égale au rapport des coefficients des termes de plus haut degré. Ici, 2x²\/x² = 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\": \"A. 2\", \"b\": \"B. -5\", \"c\": \"C. 0\", \"d\": \"D. +∞\"}}","_debug_options_count":4},{"id":9404,"question":"Soit une suite définie par u₀ = 1 et uₙ₊₁ = 2uₙ + 3. Cette suite est-elle arithmétique ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une suite arithmétique a une différence constante entre deux termes consécutifs. Ici, uₙ₊₁ - uₙ = uₙ + 3, qui n'est pas constant.","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":9405,"question":"Quelle est la dérivée de la fonction f(x) = ln(3x² + 1) ?","option_a":"A. (6x)\/(3x² + 1)","option_b":"B. (3x)\/(3x² + 1)","option_c":"C. (6x²)\/(3x² + 1)","option_d":"D. (6)\/(3x² + 1)","option_e":"","option_f":"","bonne_reponse":"a","explication":"La dérivée de ln(u) est u'\/u. Ici, u = 3x² + 1, donc u' = 6x. Ainsi, f'(x) = 6x\/(3x² + 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. (6x)\/(3x² + 1)\", \"b\": \"B. (3x)\/(3x² + 1)\", \"c\": \"C. (6x²)\/(","_debug_options_count":4},{"id":9406,"question":"La fonction f(x) = x³ - 3x² + 2 est-elle croissante sur l'intervalle [0, 2] ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La dérivée f'(x) = 3x² - 6x = 3x(x - 2). Sur [0, 2], f'(x) ≤ 0, donc la fonction est décroissante sur cet intervalle.","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":9407,"question":"Quelle est la solution de l'équation différentielle y' + 2y = 0 avec y(0) = 1 ?","option_a":"A. y = e^(-2x)","option_b":"B. y = e^(2x)","option_c":"C. y = -2e^(-2x)","option_d":"D. y = 2e^(2x)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'équation différentielle y' + 2y = 0 a pour solution générale y = Ce^(-2x). Avec y(0) = 1, on trouve C = 1, donc y = e^(-2x).","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 = e^(-2x)\", \"b\": \"B. y = e^(2x)\", \"c\": \"C. y = -2e^(-2x)\", \"","_debug_options_count":4},{"id":9408,"question":"Soit Z = 3 + 4i un nombre complexe. Quel est son module ?","option_a":"A. 5","option_b":"B. 7","option_c":"C. √7","option_d":"D. 25","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le module d'un nombre complexe a + bi est √(a² + b²). Ici, |Z| = √(3² + 4²) = √25 = 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. 5\", \"b\": \"B. 7\", \"c\": \"C. √7\", \"d\": \"D. 25\"}}","_debug_options_count":4},{"id":9409,"question":"La probabilité d'un événement A est P(A) = 0,3. Quelle est la probabilité de l'événement contraire ?","option_a":"A. 0,7","option_b":"B. 0,3","option_c":"C. 0,5","option_d":"D. 1","option_e":"","option_f":"","bonne_reponse":"a","explication":"La probabilité de l'événement contraire est P(A̅) = 1 - P(A) = 1 - 0,3 = 0,7.","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. 0,7\", \"b\": \"B. 0,3\", \"c\": \"C. 0,5\", \"d\": \"D. 1\"}}","_debug_options_count":4},{"id":9410,"question":"Soit f une fonction continue sur [a, b]. Si f(a) = -2 et f(b) = 3, alors f s'annule-t-elle sur [a, b] ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"D'après le théorème des valeurs intermédiaires, comme f est continue et change de signe, elle s'annule au moins une fois sur [a, b].","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":9411,"question":"Quelle est l'intégrale de la fonction f(x) = 2x + 1 entre 0 et 2 ?","option_a":"A. 4","option_b":"B. 6","option_c":"C. 8","option_d":"D. 10","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'intégrale de 2x + 1 est x² + x. Entre 0 et 2, on obtient (2² + 2) - (0² + 0) = 6.","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. 4\", \"b\": \"B. 6\", \"c\": \"C. 8\", \"d\": \"D. 10\"}}","_debug_options_count":4},{"id":9412,"question":"Soit un vecteur u = (2, -1, 3) dans l'espace. Quelle est sa norme ?","option_a":"A. √14","option_b":"B. √6","option_c":"C. 6","option_d":"D. 14","option_e":"","option_f":"","bonne_reponse":"a","explication":"La norme d'un vecteur (x, y, z) est √(x² + y² + z²). Ici, ||u|| = √(2² + (-1)² + 3²) = √14.","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. √14\", \"b\": \"B. √6\", \"c\": \"C. 6\", \"d\": \"D. 14\"}}","_debug_options_count":4}]