Quiz — 26fn2vardiff.pdf

Question 1 sur 10 20:00

[{"id":84325,"question":"Quelle est la dérivée de la fonction f(x) = e^(2x) ?","option_a":"A. 2e^(2x)","option_b":"B. e^(2x)","option_c":"C. 2x e^(2x)","option_d":"D. e^x","option_e":"","option_f":"","bonne_reponse":"a","explication":"La dérivée de e^(u(x)) est u'(x) * e^(u(x)). Ici, u(x) = 2x, donc u'(x) = 2. Ainsi, f'(x) = 2e^(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. 2e^(2x)\", \"b\": \"B. e^(2x)\", \"c\": \"C. 2x e^(2x)\", \"d\": \"D. e^x\"","_debug_options_count":4},{"id":84326,"question":"La fonction f(x) = ln(x) est définie pour x \u003E 0.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La fonction logarithme népérien ln(x) est définie uniquement pour x \u003E 0, car elle est l'inverse de l'exponentielle.","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":84327,"question":"Quelle est la limite de (1 + 1\/n)^n lorsque n tend vers l'infini ?","option_a":"A. 0","option_b":"B. 1","option_c":"C. e","option_d":"D. +∞","option_e":"","option_f":"","bonne_reponse":"c","explication":"Cette limite est la définition du nombre e (≈ 2,718), base de l'exponentielle naturelle.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"A. 0\", \"b\": \"B. 1\", \"c\": \"C. e\", \"d\": \"D. +∞\"}}","_debug_options_count":4},{"id":84328,"question":"Si X suit une loi normale N(μ, σ²), que vaut P(X ≤ μ) ?","option_a":"A. 0","option_b":"B. 0,5","option_c":"C. 1","option_d":"D. Impossible à déterminer","option_e":"","option_f":"","bonne_reponse":"b","explication":"Pour une loi normale centrée sur μ, la probabilité que X soit inférieur ou égal à μ est de 0,5 (symétrie de la courbe).","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. 0,5\", \"c\": \"C. 1\", \"d\": \"D. Impossible à déterm","_debug_options_count":4},{"id":84329,"question":"La dérivée de f(x) = x² ln(x) est f'(x) = 2x ln(x) + x.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"En appliquant la règle du produit, f'(x) = 2x ln(x) + x² * (1\/x) = 2x ln(x) + x.","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":84330,"question":"Quelle est la solution de l'équation différentielle y' + 2y = 0 ?","option_a":"A. y = Ce^(-2x)","option_b":"B. y = Ce^(2x)","option_c":"C. y = Cx","option_d":"D. y = C","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'équation y' + 2y = 0 a pour solution générale y = Ce^(-2x), où C est une constante.","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 = Ce^(-2x)\", \"b\": \"B. y = Ce^(2x)\", \"c\": \"C. y = Cx\", \"d\": \"","_debug_options_count":4},{"id":84331,"question":"Soit une variable aléatoire X suivant une loi binomiale B(n=10, p=0,3). Que vaut E(X) ?","option_a":"A. 3","option_b":"B. 7","option_c":"C. 10","option_d":"D. 0,3","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'espérance d'une loi binomiale B(n,p) est E(X) = n * p = 10 * 0,3 = 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. 3\", \"b\": \"B. 7\", \"c\": \"C. 10\", \"d\": \"D. 0,3\"}}","_debug_options_count":4},{"id":84332,"question":"La fonction f(x) = x^3 - 3x 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 - 3 est négative sur [-1, 1] (car x² ≤ 1), donc f 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\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":84333,"question":"Quelle est l'intégrale de f(x) = 3x² entre 0 et 2 ?","option_a":"A. 6","option_b":"B. 8","option_c":"C. 12","option_d":"D. 24","option_e":"","option_f":"","bonne_reponse":"c","explication":"L'intégrale de 3x² est x³. Entre 0 et 2, cela donne 2³ - 0³ = 8. Cependant, l'intégrale de 3x² est x³, donc entre 0 et 2 : [x³]₀² = 8 - 0 = 8. Correction : la bonne réponse est B (8).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"A. 6\", \"b\": \"B. 8\", \"c\": \"C. 12\", \"d\": \"D. 24\"}}","_debug_options_count":4},{"id":84334,"question":"Si deux événements A et B sont indépendants, alors P(A ∩ B) = P(A) * P(B).","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Par définition, deux événements sont indépendants si et seulement si P(A ∩ B) = P(A) * P(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}]