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17 articles trouvés pour ce sujet.

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	La conjecture de Goldbach		2011-02-18
		ahmedbenmoussa pose la question : montrez que tout nombre entier paire supérieur à 4 s'écrit somme de deux nombres premiers Claude Tardif lui répond.
	Nombre d'or		2003-10-31
		Claude pose la question : Comment démontrer que si a/b est égal au nombre d'or alors a+b/a est égal aussi au nombre d'or Comment faut t il choisir a et b pour que le puzzle de lewis caroll soit réalisable? on sait déjà que les nombres 8 et 5 ainsi que 6 et 3 ne sont pas valables. Claude Tardif lui répond.
	le nombre d'or		2000-06-14
		Belhaj Saad pose la question : quel est le nombre d'or? Claude Tardif lui répond.
	Golden Ratio		2013-08-26
		Mark pose la question : Please Help. I'm trying to help my Child and I have no clue on this math question. Rectangular shapes with a length to width ratio of approximately 5 to 3 are pleasing to the eye. The ratio is know as the golden ratio. A designer can us the expression 1/3(5w) to find the length of such a rectangle with width 6 inches. Robert Dawson and Penny Nom lui répond.
	Body measurements		2010-04-06
		Amirul pose la question : Recently I'm proposing my research question to my teacher for my extended essay. I'm an IB student. My research question is regarding the estimation of human in buying trousers through reference of neck. What does the relation between the diameter of the neck and the diameter of the waist? I want to see how far does the estimation theory is true for different type of people with different BMI(body mass index).. But teacher said that it is golden ratio...so nothing interesting... =( really??? But i search on net.... state that my idea seems do not have any relation with the golden ratio so far..... i just want ask you... am I able to perform in my extended essay if i continue with this research question?? Robert Dawson lui répond.
	Depth to height ratio		2009-03-26
		Janet pose la question : Is there a formula to determine how deep something (a cabinet) should be based on how tall it is? Robert Dawson lui répond.
	The Golden Ratio		2009-01-20
		Vincent pose la question : hello, my name is Vince, I am wondering how the Golden ratio was used by early mathematicians. What formula did they use to find it? open for anything... thank You! Robert Dawson lui répond.
	Art and Integers		2008-09-17
		pamela pose la question : how do artists use integers? Janice Cotcher lui répond.
	Circumscribing a golden cuboid with a sphere: surface areas		2007-06-14
		Ainslie pose la question : A golden cuboid is defined as a rectangular prism whose length, width and height are in the ratio of phi : 1 : 1/phi. Prove that the ratio of the Surface Areas of the golden cuboid to that of the sphere that circumscribes it is Phi : Pi. Stephen La Rocque lui répond.
	Karats		2007-06-01
		Lisa pose la question : What is the karat count of gold in a bracelet that contains 15g of gold and 5 g of silver? Penny Nom lui répond.
	The name of an equation		2006-11-13
		Lee pose la question : I am struggling to find the name of the following equation. I remember watching a TV programme introduced by Arthur C Clarke. The programme focused on an equation that gave a wonderful pattern that went on into infinity. Two maths professors discussed this equation.It was described as 'Gods equation' as it was compared to the shape of trees and other shapes in nature. It was named after the inventor/discoverer. If you have any ideas i would be most grateful. Penny Nom lui répond.
	The golden ratio		2004-12-31
		Cristina pose la question : let x represent the longer segment. to find the golden ratio, write a proportion such that the longer of the two segments is the geometric mean between the shorter segment and the entire segment.Use the quadratic Formula to solve the proportion for X. Find the value in both radical and decimal form. Penny Nom lui répond.
	AB/AP=AP/PB		2003-11-20
		James pose la question : My name is James McBride. I'm having a difficult time with a pre calculus problem, which goes as follows: "show that AB/AP=AP/PB is equal to (1+5^1/2)/2 (one plus the sqaure root of five with the sum divided by two. I can't do the square root sign, sorry.) I have tried to solve for PB in terms of the other varialbles and then work the quadratic equation. THAT DOES NOT WORK!!!! I am befuddled. Please help me. I am a student of secondary level. Penny Nom lui répond.
	The golden ratio		2003-09-23
		Phillip pose la question : The Golden Section can be made from an equilatereral triangle inscribed within a circle. The Golden Section is achieved by joining the mid points of two arms of the triangle to the circumference. I can prove this by erecting a perpendicular to the line outside the circle, but am interested to see how it can be proved from within the circle. Chris Fisher lui répond.
	Three goldfish		2001-05-30
		Nathan pose la question : A man has three goldfish. When the youngest goldfish was born, the oldest fish was three times the middle fish's age. Nine years ago the oldest fish's age was the sum of the two other fish's ages. How old are the three goldfish? Penny Nom lui répond.
	Fibonacci Numbers		1999-12-15
		Gary Nelb pose la question : I'm doing a project on fibonacci numbers and I'm using different starting values and finding out if different starting values to see whether or not the ratios still get closer to phi. I was wondering, what numbers should I use. Should I use two of the same # like 2 and 2, or numbers like 1 and 2, or even something totally different. Denis Hanson lui répond.
	What is the golden section?		1995-09-17
		Cindy pose la question : What is the golden section of a line? Denis Hanson lui répond.

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