HP Forum Archive 21

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Bac 2013 and Prime Message #1 Posted by Gilles Carpentier on 23 July 2013, 6:48 p.m. Here is an example to use the CAS for the BAC 2013 (french exam) http://www.lexpress.fr/education/bac-2013-le-sujet-de-maths-et-son-corrige_1259225.html EXERCICE 2 Keystroke : (a+b*LN(x))/x STO> f(x) f' Simplif solve([f(1)=2;f'(1)=0],[a,b]) 2 STO> a 2 STO> b f(x) simplif lim x->0 f(x) lim x->+oo f(x) Screen display :

Re: Bac 2013 and Prime Message #2 Posted by Patrice on 23 July 2013, 7:40 p.m., in response to message #1 by Gilles Carpentier For our US friends BAC is the exam we need to go to French university. If a USian want to go to French university, French education ask for 2 years of US university. Edited: 23 July 2013, 7:41 p.m.

Re: Bac 2013 and Prime Message #3 Posted by Namir on 23 July 2013, 11:01 p.m., in response to message #2 by Patrice My grandfather Antoine received his french BAC degree in Istanbul in the early 20th century. I have the certificate with me at home! My brother, father, and uncles all passed their French BAC exams in Lebanon, while studying under the French Jesuits there. Namir

Re: Bac 2013 and Prime Message #4 Posted by Gilles Carpentier on 24 July 2013, 5:07 a.m., in response to message #3 by Namir Quote: My grandfather Antoine received his french BAC degree in Istanbul in the early 20th century. I have the certificate with me at home! My son called Antoine like your grandfather :D

Re: Bac 2013 and Prime Message #5 Posted by Namir on 24 July 2013, 7:44 a.m., in response to message #4 by Gilles Carpentier Antoine is a good name!!!! I also have a nephew by that name.

Re: Bac 2013 and Prime Message #6 Posted by Thomas Klemm on 24 July 2013, 1:33 a.m., in response to message #1 by Gilles Carpentier Quote: Vérifier que pour tout réel strictement positif x, f'(x) =(b -a)-b ln x / x2 . Parenthesis are missing. That's not the correct solution. Cheers Thomas PS: I find it somehow ironic that a CAS is used to solve a system of equations when in fact the exercise is chosen in a manner that this is not needed. Just insert (1, 2) into the definition of f(x) to get a = 2 instantly. Edited: 24 July 2013, 1:38 a.m.

Re: Bac 2013 and Prime Message #7 Posted by Gilles Carpentier on 24 July 2013, 10:45 a.m., in response to message #6 by Thomas Klemm Quote: Parenthesis are missing. That's not the correct solution. It's a typo error in the web site Quote: PS: I find it somehow ironic that a CAS is used to solve a system of equations when in fact the exercise is chosen in a manner that this is not needed. Just insert (1, 2) into the definition of f(x) to get a = 2 instantly. In fact, I wonder if this exercice has been defined in a manner that a student without a brain can still resolve it ;) Edited: 24 July 2013, 10:45 a.m.

Re: Bac 2013 and Prime Message #8 Posted by Thomas Klemm on 24 July 2013, 12:05 p.m., in response to message #7 by Gilles Carpentier Do you mean they are easier than the Jewish Problems? Cheers Thomas

Re: Bac 2013 and Prime Message #9 Posted by Gilles Carpentier on 24 July 2013, 6:04 p.m., in response to message #8 by Thomas Klemm Thanks for the link ! Interesting ! I tried to solve the first ones with the prime and get the instantaneous answers : Problems 4, 5 and 1 : Note that 'solve' also works with inequalities Some interesting problems to try the Geometry Apps but no time for few days ... Edited: 24 July 2013, 7:05 p.m.

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