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    Hyperbolic Cosine curve fitting

    Thanks so much for your help! I graphed that, and since you solved to equation for 0 then turned 0 into y I looked for the x intercept of the graph and the value fit, thank you so much! But just for the sake of knowing, how can you guys tell if an equation has no closed form solution?
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    Solve for a

    Hmmm Alright. So I now have 7=a cosh(\frac{4}{a})+a I guess I would move a over and divide by a to get \frac{7-a}{a}=cosh(\frac{4}{a}) Now I don't know what to do. Is there some property of cosh in which I can pull something out or split something? We just started hyperbolic functions and...
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    Solve for a

    1. Homework Statement Solve for a 7=\frac{a}{2}(e^\frac{4}{a} + e^\frac{-4}{a}) + a 2. Homework Equations 7=\frac{a}{2}(e^\frac{4}{a} + e^\frac{-4}{a}) + a 3. The Attempt at a Solution 7=\frac{a}{2}(e^\frac{4}{a} + e^\frac{-4}{a}) + a multiply by 2 on both sides 14=a(e^\frac{4}{a} +...
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    Hyperbolic Cosine curve fitting

    1. Homework Statement I need to fit a curve using cosh to a hyperbola with a vertex of (0,0) and a point at (4,7). The scanned worksheet can be found here http://img519.imageshack.us/i/scan0001gu.jpg/" [Broken] http://img192.imageshack.us/i/scan0002uz.jpg/" [Broken] 2. Homework Equations y=a...
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    Basic Question Regarding the Combined Gas Law/Equation

    Hello All, I was wondering, in the combined gass law \frac{p_{1}V_{1}}{T_{1}}=\frac{p_{2}V_{2}}{T_{2}} Does T_{1} and T_{2} have to be in kelvins, or can they be any other unit of temperature as long as a consistency of units is used? Thanks
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    Silver Nitrate and Sand

    1. Homework Statement How do I separate a mixture of Silver Nitrate and Sand and loose as little silver nitrate as possible. 2. Homework Equations N/A 3. The Attempt at a Solution I know silver nitrate is water soluble, so I was going to dissolve all the silver nitrate and then...
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    Cutting an Isosceles Triangle in Half

    Thanks, but I don't know the base of the large triangle, how can I figure that out?
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    Cutting an Isosceles Triangle in Half

    To help visualize this problem please observe this attached picture.
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    Cutting an Isosceles Triangle in Half

    I'm currently using x for the various heights, with the top Isosceles triangle heights being x and the bottom trapezoid being 10-x, since the hight of the total large triangle that contains everything is ten. But thats what I have so far, what should I do about the bases of the various figures?
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    Cutting an Isosceles Triangle in Half

    How do I do it if there are so many variables involved?
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    Cutting an Isosceles Triangle in Half

    1. Homework Statement Take an Isosceles triangle with a height of 10 and draw a line parallel to the base. How far from the top of the triangle does the drawn line have to be for the top half's area to equal the bottom half's area. 2. Homework Equations The area of a triangle...
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    Two points on a graph, the mid-point of a line made by these two points is an origin.

    Re: Two points on a graph, the mid-point of a line made by these two points is an ori oh ha, so do you mean x1=y1+y2-x2 and x2=y1+y2-x1?
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    Two points on a graph, the mid-point of a line made by these two points is an origin.

    Re: Two points on a graph, the mid-point of a line made by these two points is an ori Tiny Tim, What do you mean convert y1+y2 into x1+x2? Like this x_{1}+x_{2}=y_{1}+y_{2} Or plug the equation of a parabola into the y1+y2? Which would yield y=8x^{2}+14x-2, who's zeros are...
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    Two points on a graph, the mid-point of a line made by these two points is an origin.

    1. Homework Statement Two points are located on the graph y=4x^{2}+7x-1. A line drawn between these two points have a mid-point at (0,0). Find these two points. 2. Homework Equations The midpoint formula (x_{m},y_{m})=(\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2}) 3. The Attempt...
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    Questions Regarding Energy Generating Fusion

    Hi All, I was wondering about some equations/formulae related to Fusion. How much energy/what temperature does it take to initiate Fusion? And how is this amount of energy affected by the different element/isotopes used, pressure, magnetic attraction and other variables? Thanks in advanced.
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    Stargazing Astrophotography photos

    Re: Astrophotography Hey guys, one of my friend's friend's took a picture of the latests eclipse. I think it was taken over the pacific, near Iwo Jima. Check out the earth shine on the moon! http://img403.imageshack.us/img403/6944/tse2009e500mmmid1.th.png [Broken]
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    Problem with a sequence

    SWEET, thanks guys, I got the answer. All your help, from everyone, was very much appreciated.
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    Problem with a sequence

    Kk, I've done some work, and I think I found a pattern to the sum. \frac{\sqrt{2n+1}-1}{2}
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    Problem with a sequence

    I am in the same math class as Um0123, and I currently have got \frac{\sqrt{2n-1} - \sqrt{2n+1}}{-2} would squaring the fraction be a step in the right direction?
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