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Subject: Hints for mathematical Topic wanted, Solution heavenly! Author: Peter [ Next Thread | Previous Thread | Next Message | Previous Message ] Date Posted: 06:14:20 09/05/03 Fri I got a geometric Problem which explodes my skills. The Problem can be described by 2 nonlinear equations with 2 unknowns (trigonometric polynoms). I got a numerical solution for the equations. But the real problem is, the parameters of the trigonometric polynoms are statistically distributed and not exact. I don't know, how to consider non exact parameters in solving a system of nonlinear equations?? Does this lead into the theory of Optimisation?? It would be of great benefit for me if I get hints for the right topic in mathematics where I have to look for solutions! Please contact me per email, if you're interested in my problem. Then I will explain further details! thanks! fpierre@everymail.net [ Next Thread | Previous Thread | Next Message | Previous Message ]

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[> Subject: please help me! Author: Rawan Kilo [ Edit | View ] Date Posted: 18:47:48 02/09/04 Mon The volume of the rectangular solid is given by the expression 34.944x(cubed)+44.684x(squared)-8.29x-16.8. The surface area of one side of the rectangular solid is given by the expression 6.72x(squared)+12.47+5.6. The sum of the dimensions of the rectangular solid to the nearest hundredth. You must utilize handheld technology to answer the problem and provide sketches of the graphs representing the cubic and quadratic expressions seen on handheld screen to justify your explanations. [ Post a Reply to This Message ]

[> [> Subject: Re: please help me! Author: QUITTNER [ Edit | View ] Date Posted: 12:31:45 02/13/04 Fri >The volume of the rectangular solid is given by the >expression 34.944x(cubed)+44.684x(squared)-8.29x-16.8. >The surface area of one side of the rectangular solid >is given by the expression 6.72x(squared)+12.47+5.6. >The sum of the dimensions of the rectangular solid to >the nearest hundredth. ..... What is the difficulty? You are given a volume of a rectangular solid in terms of an equation, call it y3 (3-dimensional). ..... You are also given the surface area of one side in terms of an equation, call it y2 (2-dimensional). ..... The volume of a rectangular solid is one side's length times the surface area of one side, so that y3 divided by y2 should give you the equation of the side's length, call it y1 (1-dimensional). ..... The graphs of these equations are partly negative, so you must first mention, then reject the negative parts. y1 appears to be sufficiently linear (depends on how many decimal places are used in the calculations), so that any two points can be used to get the equation of that line, such as the (approximate) root of y1 and its (-ve) intercept on the y-axis. Can you take it from here? [ Post a Reply to This Message ]

[> [> [> Subject: Re: please help me! Author: geeknick (sad) [ Edit | View ] Date Posted: 23:59:29 11/04/11 Fri 1/1+a^n + 1/1+a^-n My attempt:=1/1+a^n + 1+a^n/1=1+{1+a^n(1+a^n)}/1+a^n=1+1+2a^n+a^n^2/1+a^n=2+2a^n+a^n^2/1+a^nlet a^n=m=2+2m+2m^2/1+m=2(1+m+m^2)/1+m I don't know what to do next, the answer is supposed to be 1. will you please simplify the expression its very urgent... i tried on Many forum sites but didn't get the correct answer according to my mathematics textbook. [ Post a Reply to This Message ]