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PhysicsForums Please Help, I am so confused!  
17:22 11-Sep-07   [Replies: 1, Views: 65]    By: Unnamed
A mission critical manuver requiring precise orbit information is planned for 30 days from today. Unmodeled satellite drag effects may cause substantial problems producing large X-ray flares. It must ...
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PhysicsForums level curves  
16:55 11-Sep-07   [Replies: 2, Views: 39]    By: Unnamed
1. The problem statement, all variables and given/known data I need to sketch level curves of LaTeX Source CodeThe following code was used to generate this LaTeX image:[itex]T(x, y) = 50(1 + x^2 + ...
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PhysicsForums 1st O.D.E, homogenous...but with constants  
16:45 11-Sep-07   [Replies: 2, Views: 31]    By: Unnamed
1. The problem statement, all variables and given/known data solve: y'=(x+y-1)/(x-y-2) i.e 2. Relevant equations 3. The attempt at a solution let y=vx thus y'=v'x+v by substit...
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PhysicsForums simple polynomial problem  
14:40 11-Sep-07   [Replies: 9, Views: 73]    By: Unnamed
if the polynomial LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]x^3+3x^2+9x+3[/tex]LaTeX code reference [javascript:;]>');"> is a factor of LaTeX Source CodeThe follow...
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PhysicsForums latex question  
14:12 11-Sep-07   [Replies: 1, Views: 23]    By: Unnamed
1. The problem statement, all variables and given/known data I found it. Delete this. 2. Relevant equations 3. The attempt at a solution...
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PhysicsForums Simultaneous equations  
13:13 11-Sep-07   [Replies: 5, Views: 97]    By: Unnamed
xLaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]^{5}[/tex]LaTeX code reference [javascript:;]>');">=5yLaTeX Source CodeThe following code was used to generate this LaTe...
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PhysicsForums Basic questions  
12:59 11-Sep-07   [Replies: 1, Views: 34]    By: Unnamed
What is SUBSET on “open subset of RLaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]^{n}[/tex]LaTeX code reference [javascript:;]>');">"? How supposed I imagine the...
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PhysicsForums help  
12:47 11-Sep-07   [Replies: 1, Views: 37]    By: Unnamed
hello, can someone help me with this problem: 10 (1-cos^2 x) = 1 - 3 sin x how can you simply solve that? thanks alot!...
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PhysicsForums Stats: Making histogram  
10:42 11-Sep-07   [Replies: 1, Views: 19]    By: Unnamed
I have a quick question regarding a stats problem in my girlfriend's text. It is pretty easy I suppose, but I am not quite sure; the text does not appear to give a "general form" of how to ...
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PhysicsForums cyclic group question  
09:49 11-Sep-07   [Replies: 3, Views: 43]    By: Unnamed
1. The problem statement, all variables and given/known data List the cyclic subgroups of U(30) 2. Relevant equations 3. The attempt at a solution In order to list the cyclic subgroups...
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PhysicsForums the axiom of choice. Help!!!  
08:24 11-Sep-07   [Replies: 4, Views: 102]    By: Unnamed
well i am having trouble understanding why we need the axiom of choice. So could anybody post here some problems, and their solutions, that include the axiom of choice, and explain how it works, so h...
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PhysicsForums difference between closed set and bounded set  
08:22 11-Sep-07   [Replies: 2, Views: 57]    By: Unnamed
The way they use the terms:"closed set" and "bounded set" make me thinking that a closed set is different from a bounded set but i can not figure out how to prove that. So can some...
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PhysicsForums Least distance from a point to a parabola  
06:29 11-Sep-07   [Replies: 3, Views: 38]    By: Unnamed
1. The problem statement, all variables and given/known data There is a point (4,2), from which I have to find the least distance to the parabola y^2=8x. I.e, the least distance connecting the point ...
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PhysicsForums Subset  
04:53 11-Sep-07   [Replies: 1, Views: 20]    By: Unnamed
* Determine whether H, a subset of the vector space V, is a subspace of V. V=P3, H={p is an element of P3: p(0)=0 Any help is greatly appreciated!!...
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PhysicsForums Spanning and subsets  
04:51 11-Sep-07   [Replies: 1, Views: 24]    By: Unnamed
* If p1,p2,……pm span Pn, write down a mathematical relationship between m and n. I know that Pn means the space of all polynomials of degree at most n, and this is an (n+1) dimension space, but im ...
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PhysicsForums Probability  
04:05 11-Sep-07   [Replies: 2, Views: 34]    By: Unnamed
A statistician went fishing, and noticed that the masses of the fish he caught could be modeled with a normal distribution. He noticed that the Tuna had a mean mass of 22kg, with a standard deviation ...
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PhysicsForums Another U substitution  
23:59 10-Sep-07   [Replies: 11, Views: 76]    By: Unnamed
I know this must be similar..... LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]\\int \\frac{e^x}{1+e^{2x}}[/tex]LaTeX code reference [javascript:;]>');"> should ...
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PhysicsForums u substitution  
23:13 10-Sep-07   [Replies: 6, Views: 49]    By: Unnamed
First day of u subs... LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]\\int t \\sqrt{7t^2+12}dt[/tex]LaTeX code reference [javascript:;]>');"> I am assuming that ...
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PhysicsForums Difficulty with washer method when revolving around axis other than y ..  
22:14 10-Sep-07   [Replies: 2, Views: 62]    By: Unnamed
1. The problem statement, all variables and given/known data The region in the second quadrant bounded above by the curve y=-x^3, below by the x-axis, and on the left by the line x=-1, about the line...
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PhysicsForums show that ((p implies q) and (q implies r)) implies (p implies r) is a..  
21:31 10-Sep-07   [Replies: 2, Views: 38]    By: Unnamed
1. The problem statement, all variables and given/known data Show that LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]\\left[\\left(p\\,\\longrightarrow\\,q\\right)\...
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PhysicsForums Metric space and subsets of Euclidean space  
21:18 10-Sep-07   [Replies: 15, Views: 128]    By: Unnamed
I am having some troubles understanding the following, any help to me will be greatly appreciated. 1) Let S1 = {x E R^n | f(x)>0 or =0} Let S2 = {x E R^n | f(x)=0} Both sets S1 and S2 are &q...
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PhysicsForums 3D Surfaces - Equation Formed When Rotating a 2D Line About an Axis?  
20:22 10-Sep-07   [Replies: 6, Views: 43]    By: Unnamed
Hi everyone, I'm pretty new to Physics Forums but it seems like a fairly friendly community. :) 1. The problem statement, all variables and given/known data Determine the equation of the surfa...
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PhysicsForums product rule question  
20:20 10-Sep-07   [Replies: 1, Views: 42]    By: Unnamed
I've already done the problem (here is the last part, sorry for crappy pic) My question; if I multiply both sides of the + by x^2(x+1) / x^2(x+1) as the common factor to simplify the equation, ...
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PhysicsForums Find the areas bounded by 4 equations  
20:03 10-Sep-07   [Replies: 1, Views: 27]    By: Unnamed
1. The problem statement, all variables and given/known data I won't post the entire problem since I'm only stuck on one part of it. I need to find where y=cos x and y=sin 2x intersect. 2. Rele...
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PhysicsForums tensor calculus  
19:54 10-Sep-07   [Replies: 0, Views: 26]    By: Unnamed
1. The problem statement, all variables and given/known data equation of ellipse may be written ax^2 + 2hxy + by^2 =1 What is the tensor charater of a, h, b with respect to transformation to any Ca...
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