Testez vos connaissances : Logarithmes et Probabilités en Terminale

Question 1 sur 10 10:00

[{"id":22158,"question":"Quelle est la dérivée de la fonction f(x) = ln(x) ?","option_a":"A. 1\/x","option_b":"B. x","option_c":"C. e^x","option_d":"D. 1","option_e":"","option_f":"","bonne_reponse":"A","explication":"La dérivée de la fonction logarithme népérien ln(x) est 1\/x, une propriété fondamentale à retenir.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22159,"question":"Si A et B sont deux événements 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":"Cette égalité est la définition de l'indépendance entre deux événements en probabilités.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22160,"question":"Résoudre l'équation ln(x) = 2.","option_a":"A. x = e^2","option_b":"B. x = 2","option_c":"C. x = ln(2)","option_d":"D. x = 1\/e^2","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'équation ln(x) = 2 équivaut à x = e^2, en utilisant la définition du logarithme.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22161,"question":"Quelle est la valeur de P(A ∪ B) si P(A) = 0.4, P(B) = 0.5 et P(A ∩ B) = 0.2 ?","option_a":"A. 0.7","option_b":"B. 0.9","option_c":"C. 0.6","option_d":"D. 0.8","option_e":"","option_f":"","bonne_reponse":"B","explication":"La formule P(A ∪ B) = P(A) + P(B) - P(A ∩ B) donne 0.4 + 0.5 - 0.2 = 0.7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22162,"question":"La fonction logarithme est définie pour x \u003E 0.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le logarithme népérien ln(x) est défini uniquement pour les valeurs strictement positives de x.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22163,"question":"Quelle est la propriété du logarithme ln(ab) ?","option_a":"A. ln(a) + ln(b)","option_b":"B. ln(a) × ln(b)","option_c":"C. ln(a) - ln(b)","option_d":"D. ln(a)\/ln(b)","option_e":"","option_f":"","bonne_reponse":"A","explication":"La propriété fondamentale du logarithme est ln(ab) = ln(a) + ln(b), utile pour simplifier les calculs.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22164,"question":"Un dé équilibré est lancé. Quelle est la probabilité d'obtenir un nombre pair ?","option_a":"A. 1\/6","option_b":"B. 1\/2","option_c":"C. 1\/3","option_d":"D. 2\/3","option_e":"","option_f":"","bonne_reponse":"B","explication":"Les nombres pairs sur un dé sont 2, 4 et 6, soit 3 issues favorables sur 6 possibles, donc 1\/2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22165,"question":"La fonction f(x) = ln(x) est croissante sur son ensemble de définition.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La dérivée de ln(x) est 1\/x, toujours positive pour x \u003E 0, donc la fonction est strictement croissante.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22166,"question":"Quelle est la valeur de ln(e^3) ?","option_a":"A. 3","option_b":"B. e","option_c":"C. 1","option_d":"D. 0","option_e":"","option_f":"","bonne_reponse":"A","explication":"Par définition, ln(e^x) = x, donc ln(e^3) = 3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22167,"question":"Si X suit une loi normale N(0,1), quelle est la probabilité P(X ≤ 0) ?","option_a":"A. 0.5","option_b":"B. 0","option_c":"C. 1","option_d":"D. 0.25","option_e":"","option_f":"","bonne_reponse":"A","explication":"La loi normale centrée réduite N(0,1) est symétrique par rapport à 0, donc P(X ≤ 0) = 0.5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]