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Sove simple equation doubt September 21st 2011, 06:06 AM FernandoBasso Sove simple equation doubt I'm solving this: Code: 3 – 7 * (1 - 2x) = 5 – (x + 9) And am trying this way: Code: 3- 7 * (1 - 2x) = 5 - (x + 9) 3 - 7 ..?? ?? = 5 - x - 9) What should be done in the part I put tho...
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Transformation of the dynamics of mechanical system under coordinate change up vote 0 down vote favorite It is well known that the dynamics equation for a mechanical system (e.g. a robotics manipulator) is given be the Euler-Lagrange equation which takes the particular form (in the simplified version), $$ M(q)\ddot{q...
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Bernoulli equation April 17th 2009, 01:00 PM #1 Newbie Joined Apr 2008 Posts 15 I am having trouble expanding this Bernoulli equation correctly to solve it. Any help to get me this far would be wonderful. x^2 dx/dy = 2y (e^1/x y^-1/2 -1) For those who think it looks confusing what inside the brac...
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Finding the volume revolved around the given axis? April 19th 2010, 11:18 AM AlphaRock Finding the volume revolved around the given axis? y = x^2 y = 2x What is the volume of the region bounded by y = x^2 and y = 2x around y = 3? April 19th 2010, 12:59 PM Warrenx Quote: I guess the basics s...
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Filling a Tank Associated Topics || Dr. Math Home || Search Dr. Math Filling a Tank Date: 08/01/97 at 20:14:14 ...
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Calculating area of square within an ellipse April 12th 2008, 05:13 PM #1 Newbie Joined Apr 2008 Posts 1 Have a home work problem I'm not too sure about. Need to know what the correct method for calculating the area and generic equation for a square area within an ellipse. Can anybody out there point...
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Vector Proof February 27th 2008, 12:37 PM #1 Newbie Joined Feb 2008 Posts 9 Vector Proof If a and b are arbitrary scalar fields, show that del.[del(a)xdel(b)] = 0. Is this anything to do with perpendicular vectors as I remember if two vectors are indeed perp., then the dot product of both of th...
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Pre Cal probs dealing with sinusoids May 3rd 2009, 01:14 PM #1 Newbie Joined May 2009 Posts 6 Pre Cal probs dealing with sinusoids [IMG]file:///Users/erin/Library/Caches/TemporaryItems/moz-screenshot.jpg[/IMG]I need help with these! If I have made headway on the problems, I have posted what I have below ...
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Set of vectors separated by at least a specified angle up vote 7 down vote favorite 3 Suppose theta and d are given. How big can a set of d-dimensional vectors be such that no pair of them are at angle less than theta? I particularly want an upper bound; that is, an n=n(theta,d) such that given n d-dimensional vect...
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Normal Numbers Date: 10/19/1999 at 04:20:18 From: Eugenio Rapella Subject: Normal numbers I teach math in an Italian high school; I'm fascinated by number theory but I know almost nothing about it. I've some questions concerning "normal numbers." Let's say that a real number r is normal in base b if, writing r as a...
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Math Forum Discussions - THE MASONIC CODES of the UNITED STATES OF AMERICA, Part 7 Date: Aug 22, 2011 3:21 PM Author: "ionvulcanescu" Subject: THE MASONIC CODES of the UNITED STATES OF AMERICA, Part 7 Copyright 2011 by Ion Vulcanescu. ---------------------------------------- This article presents: THE MASONIC CODES o...
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Differential Equation (Oscilation Problem) January 26th 2011, 01:00 PM #1 Newbie Joined Dec 2010 From Texas Posts 3 Differential Equation (Oscilation Problem) Hello, I am trying to solve what I thought was going to be a simple differential equation. $m\ddot{x}=-kx^{2n+1}:n \in \mathbb{Z}-\{0...
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How do I orthogonally diagonalize a matrix? July 23rd 2009, 09:53 AM lovestoskate How do I orthogonally diagonalize a matrix? I'm given a matrix A = -3 0 -4 0 5 0 -4 0 3 I have to orthogonally diagonalize the matrix and give the orthogonal matrix P and the diagonal matrix D. I have no idea how...
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Planar intersections January 12th 2011, 06:21 AM #16 Newbie Joined Jan 2011 Posts 19 I didnt think of that, but i suppose it would be along the now tilted wall? So the angle would always be measured on the surface of whatever object the disc falls on. In that case, what you might want to consider doi...
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What is known about maximal free subgroups of surface groups? up vote 4 down vote favorite Let $\Gamma_g=< a_1,...,a_g,b_1,...,b_g | \prod_{i=1}^g [a_i,b_i]>$ (a surface group). What is known about maximal free subgroups of $\Gamma_g$ for $g>1.$ (I.e. free subgroups which are not properly embedded into any other free ...
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Number of elements and subgroups December 5th 2013, 02:53 PM #1 Junior Member Joined Oct 2013 From Moscow, Russia Posts 41 Number of elements and subgroups I have a question that I feel I am going about in a roundabout way, and would like some help on. I am preparing for an exam. Problem: Let G...
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Arithmetic progressions in power sequences up vote 12 down vote favorite 4 In connection with this MO post (and without any applications / motivation whatsoever), here is an apparently difficult - but nice - problem. For a non-zero real number $s$, consider the infinite sequence $$ P_s := \{ 1^s, 2^s, 3^s, \ldots \} ...
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What is the inverse of this function!? February 27th 2010, 04:17 AM #1 Newbie Joined Jan 2010 Posts 14 What is the inverse of this function!? f(x) = tan(x) +3x for x in (-pi/2,pi/2) This is just a little part of the whole question which is on the Inverse Function Theorem, I need to find the inverse ...
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Area of an inscribed Rectangle June 3rd 2008, 08:46 PM ludiaz223 Area of an inscribed Rectangle A rectangle that is x feet wide is inscribed in a circle of radius 8 ft. a) Express th area of the rectangle as a function of x. b) find the domain of the function c) What dimmensions maximize the area of...
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Equality of the sum of powers up vote 9 down vote favorite Hi everyone, I got a problem when proving lemmas for some combinatorial problems, and it is a question about integers. Let $\sum_{k=1}^m a_k^t = \sum_{k=1}^n b_k^t$ be an equation, where $m, n, t, a_i, b_i$ are positive integers, and $a_i \neq a_j$ for all ...
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evaluation of exponential expression without a calculator, how do i determine that : 32^3/5 = 8 the problem is: evaluate: 32^-3/5 =1/32^3/5 =??? 1/8 ? thus my original question: without a calculator, how do i Know that 32^3/5 = 8 ...okay, find the fifth root of 32 and cube it, gotcha If you want to be fancy This does...
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Convergence of Newton series for sin ax up vote 1 down vote favorite 2 Let's define half discrete-analytic function as a function whose Newton series converges to that function for each $x>0$: $$f(x)=\sum_{k=0}^\infty \binom{x}k \Delta^k f\left (0\right)=\sum_{m=0}^{\infty} \binom {x}m \sum_{k=0}^m\binom mk(-1)^{m-k}...
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Solve inequality help plz!! Note that $|3-4x| \geq 0$ always. If $xot = \tfrac{3}{4}$ then $|3-4x| ot = 0$ and so $|3-4x| > 0$. We know that $x=\tfrac{3}{4}$ cannot be such a number which makes this true - thus we will look at all other numbers to solve this. Divide by $|3-4x|$ to get $(x+5)(3x-2)>0$. Case 1: Both $(x+...
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Find volume of a cube as a function of diagonal length. September 29th 2010, 10:15 AM choy777 Find volume of a cube as a function of diagonal length. Find the relationship describing the volume (V) of a cube as a function of the length of the diagonal going through the cube (d). and evaluate it for a diagonal le...
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When is the product of two ideals equal to their intersection? up vote 21 down vote favorite 18 Consider a ring $A$ and an affine scheme $X=SpecA$ . Given two ideals $I$ and $J$ and their associated subschemes $V(I)$ and $V(J)$, we know that the intersection $I\cap J$ corresponds to the union $V(I\cap J)=V(I)\cup V(J)...
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Double Integrating an Absolute Function November 10th 2010, 12:48 PM #1 Having difficulty solving this one: $\int\int_D|cos(x+y)|dA$ for $0 \leq x \leq \pi$ and $0 \leq y \leq \pi$. For the first partition, I integrated $\int_{0}^{\frac{\pi}{2}}\int_{0}^{\frac{\pi}{2}-x}}cos(x+y)dydx$ and got $\frac{...
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The Fisher-Neyman Factorization Theorem Suppose x n ∼Bernoulli⁢θ x n Bernoulli θ are IID,   ,   n= 1 , … , N    n n 1 , … , N . Denote x= x 1 … x n T x x 1 … x n . Then f θ x=∏ n =1Nθ x n ⁢1−θ1− x n =θk⁢1−θN−k=a⁢x⁢b θ k f θ x n 1 N θ x n 1 θ 1 x n θ k 1 θ N k a x b θ k (1) where k=∑ n =1N x n k n 1 N x n , a⁢x=1 ...
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Intersection January 22nd 2007, 01:49 PM symmetry Intersection Two cars are approaching an intersection. One is 2 miles south of the intersection and is moving at a constant speed of 30 mph. At the same time, the other car is 3 miles east of the intersection and is moving at a constant speed of 40 mph. Expre...
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Evaluate the Limit Date: 12/03/97 at 19:39:26 From: Justin Yackoski Subject: Limit of (1-cos x)/(x^2) as X->0 In Calculus today we were trying to evalulate the limit of (1-cos x) --------- x^2 as x approaches zero. I hope that looks right on your screen. The book said the answer was 1/2 but I graphed it on my ...
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Summing a Binary Function Sequence Date: 07/16/98 at 15:56:16 From: Mark Ping Subject: Calculate the sum of a sequences Dear Dr. Math, Here is the question: Compute oo ---- \ B(n) / -------- ---- n(n+1) n=1 where B(n) denotes the sum of the binary digits of n. Thanks, Mark Ping ...
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Coordinate geometry-- October 19th 2010, 08:52 AM Ilsa Coordinate geometry-- Find the equation of the line through the point (5,2) and parallel to the line 2y-3x=4. Find the value of a if the line ax-(a+1)y+2=0 does not intersect the pair of parallel lines. The underlined part is what i could not get. Octo...
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Math Forum Discussions Math Forum Ask Dr. Math Discussions Internet Newsletter MathTools Teacher2Teacher Teacher Exchange Workshops Search All of the Math Forum: Views expressed in these public forums are not endorsed by Drexel University or The Math Forum. Topic: Egyptian algebraic geometry Replies: 11 Last Post:...
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What is the shape of the zeta function of a singular hypersurface? up vote 4 down vote favorite So let $X$ be a projective hypersurface inside $\mathbb{P}_{\mathbb{Z}}^n$ of degree $d$. Assume that (a) $X(\mathbb{C})$ and $X(\overline{\mathbb{F}}_p)$ are irreducible, (b) and that $X(\mathbb{C})$ and $X(\overline{\ma...
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In Task Scheduling, It Is Common To Use A Graph... | Chegg.com Question: In task scheduling, it is common to use a graph representation with a node for each task and a directed edge from task i to task j if i is a precondition for j. This directed graph depicts the precedence constraints in the scheduling problem. Cl...
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Possible locations for non trivial zeroes lying off the critical line up vote 0 down vote favorite It has been proven that: 1) if $s$ is a non trivial zero $\rho$ of $\zeta(s)$ then so is $1−s$. 2) $\zeta(s) = 2^s \pi^{s-1} \sin(\frac{\pi s}{2}) \Gamma(1-s) \zeta(1-s)$ 3) $ 0 < \Re(\rho) <1$ From this it follows t...
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Vehicle travelling question May 25th 2009, 11:08 PM #1 Newbie Joined May 2009 Posts 7 Vehicle travelling question a vehicle , say A, starts 13km north of an intersection and proceeds due south at 50kph. Another vehicle, say B, starts 8km east of the intersection and proceeds due west at 40kph. A) fi...
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Dividing a Circle into 8 Equal Parts Date: 08/19/2002 at 22:23:17 From: Thomas Weir Subject: Dividing a circle into equal parts If you have a diameter (= 14ft), can you mark off the 1/8 sides of the circumference so that they are equal? Thank you, Tom P.S. I'm a contractor, and the concrete is coming at 1:00 P.M. t...
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Need help finding δ in this calculus problem! January 19th 2014, 12:51 PM #1 Junior Member Joined Feb 2013 From PA Posts 26 Need help finding δ in this calculus problem! Hi all, The problem shows the graph of f(x) = x^2 - 1 and asks to find δ such that if 0 < |x - 2| < δ, then |f(x) - 3| < 0.2. ...
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Assigning Random Numbers Date: 05/16/2000 at 09:21:10 From: Ande Bennett Subject: Randomization I am using a programming language and have a random number generator that can generate a random number of 0, 1, or 2. I need to assign those three values to 4, 12, and 14. I am looking for a formula to do this. For exampl...
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Three modifications of connectedness up vote -1 down vote favorite 1 This question arose in my research of generalized connectedness (see this draft article for the overall idea, but beware that the draft is yet too preliminary and unreadable, however I hope you can understand the overall idea from the draft): Let $U...
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Help with derivative application and application in relation to time. October 8th 2008, 11:35 PM #1 Junior Member Joined Sep 2008 Posts 42 Help with derivative application and application in relation to time. I have a Calculus test tomorrow, and I'm honestly lost here. This is from a sample test. 5....
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E problem April 8th 2010, 05:09 PM #1 Newbie Joined Apr 2010 Posts 2 E problem Must find x Ae^Bx = e^Cx Where A,B,C are constants My work: lnA + Bx = Cx lnA / (C - B) = x I am not confident in this answer I get $Ae^{Bx} = e^{Cx}$ $\ln (Ae^{Bx}) = \ln (e^{Cx})$...
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one angle one circle and one point January 17th 2009, 11:06 AM Narek one angle one circle and one point hi to everyone. here I have a problem which has to be solved geometrically. The problem is the following: There exists an angle. we have a point "A" which is set in a random place inside the angle. T...
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Solving Rational Inequalities May 31st 2009, 04:45 PM Exquisite Solving Rational Inequalities I'm having difficulty understanding inequalities. I thought I knew what to do in order to solve them, but when I did the practice problems, I kept getting them wrong. My mind is pretty overwhelmed. (Crying) I a...
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GMAT Math: Advanced Geometric Solids The GMAT will ask you about geometric solids.  The OG tells you that you should expect questions about rectangular solids and cylinders. Here, I will discuss four less common solids that are much less likely to appear on the GMAT Math section: the prism, the pyramid, the cone, and ...
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Differences between reflexives and projectives modules up vote 5 down vote favorite 2 Let R be a normal noetherian domain. What is the difference between a finitely generated reflexive module and a finitely generated projective module? Can anybody recommend any references or make any suggestions about this? Finitel...
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Strongly Regular Graphs (This material is taken from Chapter 2 of Cameron & Van Lint, Designs, Graphs, Codes and their Links) Our graphs will be simple undirected graphs (no loops or multiple edges). Graphs do not make interesting designs. A general graph is a 0-design with k = 2. A regular graph is a 1- design and t...
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Characterization of primes May 20th 2010, 03:39 AM #1 Member Joined Nov 2009 Posts 169 Characterization of primes Show that $(x+1)^n \equiv x^n + 1^n \mod n$ in $\mathbb{Z}[x]$ if and only if n is a prime. (In other words,all coefficients in the difference polynomial $(x + 1)^n - (x^n + 1^n)$ are div...
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Can we extract information about how fast a function decay from its Laplace transform? up vote 2 down vote favorite 1 My question is whether we can extract information about how fast an integrable function converges to zero by looking at the asymptotics of its Laplace transform. More concrete case, let $f:\mathbb{R} ...
5
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Find Dimensions of Rectangle November 8th 2008, 07:49 AM #1 MHF Contributor Joined Jul 2008 From NYC Posts 1,489 Find Dimensions of Rectangle A special window in the shape of a rectangle with semicircles at each end is to be constructed so that the outside dimensions are 100 feet in length. Find the ...
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Is there a "primitive-recursively enumerable" set whose complement is not such? up vote 7 down vote favorite 2 Call a subset of $\mathbb{N}$ primitive-recursively enumerable (p-r.e.) if it is empty or an image of a primitive recursive function. I feel like a lot must be known about the poset of such sets ordered by in...
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Degree of image of a polynomial map up vote 4 down vote favorite 2 Let $K$ be a field. Let $V/K$ be an affine variety in $A^m$. Let f be a polynomial map (and hence a "morphism of finite type") $f:V\to A^n$. A theorem of Chevalley's tells us that im(f) is either a variety or "almost" a variety - that is, im(f) is a va...
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Word problem involving differentiation.. December 1st 2008, 10:17 AM struck Word problem involving differentiation.. A water tank has a rectangular base 1.5m by 1.2m. The sides are vertical and water is being added to the tank at a constant rate of 0.45m^3. At what rate is the depth of water in the tank incr...
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Intuition behind o-minimal structures. up vote 9 down vote favorite 4 This is very much the same post as I posted at math.stackexchange. I am following the definitions of an o-minimal system in "Tame Topology and O-minimal Structures" by Lou van den Dries. It is immediate from the definition that the graph of $\sin(...
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Number of Combinations for 7 Dice Date: 22 Feb 1995 01:22:08 -0500 From: Michel Subject: 7 dice # of combinations? Hello there! I'm looking for the derived formula solution for the following problem someone posted in a math echo and to whom I've replied this: There are seven dice. Each die has six faces. How ma...
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When rolling three dice, what is the probability of February 22nd 2009, 07:27 PM #1 Newbie Joined Feb 2009 Posts 1 When rolling three dice, what is the probability of When rolling three dice, what is the probability of a) getting three different numbers? b) having at least one two and at leas...
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Questions about special $C^*$-subalgebras and ideals. up vote 1 down vote favorite 1 Let $A$ be a $C^*$-algebra and $I$ be a two side closed (essential) ideal of $A$. Suppose that $p \in A\backslash I$ is a non trivial projection. Let $B=pIp$. My questions are: (1) Is $B$ a $C^*$-subalgebra of $I$? (2) If (1) is cor...
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Number of Iterations September 15th 2010, 02:49 PM #1 Newbie Joined Sep 2010 Posts 3 Number of Iterations How many times does the innermost loop execute: Code: for k = 1 to n for j = 1 to k for i = 1 to j #the inner loop end for end for ...
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Method of Characteristics: Prove the u and v is a solution October 23rd 2010, 09:41 AM #1 Method of Characteristics: Prove the u and v is a solution Dear Folks, Can anyone get me started on how to approach the following question: Consider the following 1st order linear PDE $a(x,y) \frac{\partial u}{\par...
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DERIVATION OF THE BLACK-SCHOLES EQUATION ┏━━━━━━━━━━━━━━━━━━━━┓ ┃ ┃ ...
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[ -0.051513671875, 0.03515625, 0.061279296875, 0.1376953125, 0.01483154296875, -0.032958984375, 0.0003490447998046875, 0.045166015625, 0.042724609375, -0.035400390625, 0.06884765625, -0.00848388671875, -0.0030364990234375, -0.09326171875, -0.05078125, 0.0703125, -0.07666015625, -0.00...
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Cantor set and Hilbert cube, or anything else? up vote 4 down vote favorite I have recently rediscovered (after several years) the wonder of the Cantor set (so rich and so beautiful!). I have two questions that are unrelated, but they are both about Cantor sets. 1. Let $K$ be a non-empty compact, perfect, metric spa...
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rational exponents August 11th 2011, 09:46 PM #1 Member Joined Oct 2010 From Heart of Winter Posts 115 Thanks 1 rational exponents I can not get this. the left hand side simplifies to the right. $-x^2(x^2+1)^{-3/2}+(x^2+1)^{-1/2} \Rightarrow (x^2+1)^{-3/2}$ I tried this but but then if ...
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Math Forum Discussions - Re: An optimization problem Date: Sep 7, 2013 3:40 PM Author: RGVickson@shaw.ca Subject: Re: An optimization problem On Saturday, September 7, 2013 6:00:16 AM UTC-7, anal...@hotmail.com wrote: > consider f(x1,x2,...xn) = {1 + sum(xi)^2)} / {1 +sum{x(i)} > > > > 0 <=xi <=1 for all i. > > > > Th...
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Unitary matrices- General form November 22nd 2007, 07:02 AM #1 Junior Member Joined Nov 2007 Posts 68 Unitary matrices- General form Does anybody know the general form of a 2x2 unitary matrix such that GG*=I. Where I is identity matrix and G* is conjugate traspose of G. I have been told that it is: ...
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l'Hopital's rule January 23rd 2009, 08:15 AM #1 Newbie Joined Dec 2008 From Pennington gap Posts 16 l'Hopital's rule Find the limit by using the l' Hopital's rule! \lim_{x\to0}\frac{\cos\!\left(x\right)-1}{2x^2} So far i got to \lim_{x\to0}\frac{\-sin\!\left(x}{4x} What do you do n...
4
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Proof by Induction May 16th 2010, 10:02 AM #1 Newbie Joined Oct 2009 Posts 16 Proof by Induction I am to prove the following equation by induction: (1/2)+(1/6)+(1/12)+...+1/n(n+1)=n/(n+1) so far I have the base case= 1 Assume this is true for n=k (1/2)+(1/6)+(1/12)+...+1/k(k+1)=k/(k+1...
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Motion - Please, any help??? April 24th 2010, 06:46 AM #1 Junior Member Joined Nov 2009 Posts 54 A large stone is falling through a layer of mud and its depth x m below ground level at time t minutes is given by x = 12 - 12e^(-0.5t). How long will it take the stone to reach within 1 mm of its final po...
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Electrical Engineering Archive | January 31, 2010 | Chegg.com There is no initialenergy stored in the circuit shown in the Figure. Find the value of vo for t ¸ 0 in this circuit. 1. Find the initial conditionsfor the circuit in the figure. The value of the initial conditionsmay be given in the statement of the problem...
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polar equation November 14th 2009, 02:13 PM #1 Member Joined Feb 2009 Posts 91 polar equation Hi Show that the polar equation r= a cos x + b sin x where ab not equal 0 represents a circle and find its center and radius I really have no idea where to start - any ideas at all?? Thanks S...
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6.25 -> binary 09-09-2003 #1 Registered User Join Date Nov 2002 Posts 1,109 6.25 -> binary I need some help with this. I'm not sure if I did it right, but converting decimal 6.25 to binary, I got 110010011. Is this right? I was just able to print the homework today, and I have a class tomorrow durin...
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cauchy condensation test April 25th 2010, 05:33 AM #1 Junior Member Joined Apr 2010 Posts 43 cauchy condensation test Hello to all, the cauchy condensation test says: sum(a_n) converges if and only if sum (2^n)(a_(2^n)) converges. So how do we pronve using this test the divergence of 1) s...
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Bayesian Phylogenetic Analysis Exercise written by: Anders Gorm Pedersen Overview Today's exercise will focus on phylogenetic analysis using Bayesian methods. We already discussed Bayesian statistics and Bayesian phylogeny in class, but if you want to refresh your memory, then you can read a brief introduction at th...
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Schwartz space inequality up vote 0 down vote favorite Let $g$ be a function in the Schwartz space $\mathscr S (\mathbb R)$. Show that for any $l \ge 0$, we have $\sup_x |x|^l |g(x-y)|\le A_l (1+|y|)^l$ by considering separately the cases $|x|\le 2|y|$ and $|x|\ge 2 |y|$. The Schwartz space is defined as the set $\ma...
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Trigonometry im lost March 2nd 2014, 01:37 PM #16 Senior Member Joined Feb 2014 From United States Posts 454 Thanks 184 Re: Trigonometry im lost You convert by adding the equivalent of a circle, either 360 degrees or 2 pi radians. So converting - 0.848 radians to positive radian measure give...
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The Relation of the Speed of a Boat to the Water Line Date: 2/27/96 at 16:22:11 From: Anonymous Subject: math I have a math question. I understand that there is a mathematical formula or equation for calculating the speed of a boat as it relates to the water line of the boat. Can you help? Date: 3/2/96 at 14:53:...
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Help for domain and range May 1st 2010, 03:10 AM #1 Newbie Joined Mar 2010 Posts 10 Help for domain and range Hi all, I am having trouble with the process for this problem. What is the domain and range for this function? $f(x)=\sqrt{\frac{x-1}{x+1}} <br />$ Thanks. Hi The dom...
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Patent US6490374 - Accelerated signal encoding and reconstruction using pixon method This is a continuation application of Ser. No. 09/333,172, filed Jun. 14, 1999, which is a continuation in part application of Ser. No. 08/073,929, filed Jun. 8, 1993, now U.S. Pat. No. 5,912,993. Pursuant to 35 U.S.C. §202(c), it is ...
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www.unc.educourses2007springenvr890003lectur Assessing Risk from Environmental Exposure to Waterborne Pathogens: Use of Dynamic, Population-Based Analytical Methods and Models May 11, 2005 This lecture is based on lecture material prepared by Prof. Joe...
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Equation for Line Of Best Fit? April 12th 2013, 08:10 AM tdotodot Equation for Line Of Best Fit? I have a chart out of which I made a graph, On Microsoft Excel (2011 for mac). I then added a Line of Best Fit. I need to answer questions about the graph, which include knowing the line of best fit. (Teacher s...
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Diffusion in Ehrenfest wind-tree model Posted by: matheuscmss | November 18, 2011 Diffusion in Ehrenfest wind-tree model A few weeks ago, I was invited by my friend Jairo Bochi to give a “general audience like” talk (that I’ll deliver today) at UFRJ (Brazil) in a Dynamical Systems seminar called EDAI. After thinking ...
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password problem. October 10th 2011, 02:50 AM #1 Senior Member Joined Jan 2007 Posts 477 password problem. there are 26 possible letters in the english alphabet, pick passwords that don't contain any repeated letters. passwords are 5 letters each, how many passwords are to choose from? I'm not sure ...
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Finding f(x) April 21st 2009, 10:51 AM #1 Junior Member Joined Feb 2009 Posts 36 Finding f(x) Let f be the function defined for all x > -5 and having the following properties. Find an expression for f(x). i) f ''(x) = 1/ (x+5)^1/3 for all x in the domain of f ii) the line tangent to the graph of ...
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ono-one function question and partial fractions question October 2nd 2011, 12:33 AM #8 October 2nd 2011, 12:31 AM #7 Newbie October 2nd 2011, 12:01 AM #6 October 1st 2011, 11:51 PM #5 Newbie October 1st 2011, 10:40 PM #4 Grand Panjandrum October 1st 2011, 09:14 PM #3 Newbie October 1st 2011, 09:06 PM #2 October...
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Method Simultaneously Matches Inputs and Outputs Engineers working on amplifier designs learned about the unilateral gain approach last month in Part 3 of this article series. That technique aims at simplifying amplifier design by providing an approximate solution, ignoring feedback in the transistor and with it the in...
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Cofactor of a Determinant September 3rd 2010, 06:41 AM #1 Banned Joined Aug 2010 Posts 961 Thanks 98 Cofactor of a Determinant A 4th order determinant (aij) is given by e(ijkl) a1i a2j a3k a4l and the summation convention over repeated indices. e(ijkl) is the general kronecker delta (for ex...
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[SOLVED] Please help with proof February 2nd 2010, 09:46 AM #1 Junior Member Joined Feb 2010 Posts 28 [SOLVED] Please help with proof I have no idea how to go about it really. Any help is very much appreciated. $<br /> \sum_{k=1}^{n}k^2 = \frac{n(n+1)(2n+1)}{6}<br />$ Hi nunos I suggest us...
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Trigonometric Identities Prove the following identity cosec (theta) + tan (theta) = 1 / [cosec (theta) - tan (theta)] cosec (theta) + tan (theta) = 1 / sin (theta) + (sin (theta)/cos (theta)) = [cos (theta) + sin ^2 (theta) ] / sin (theta) cos (theta) I require help for further steps If I substitute sin^2 (theta) = 1 ...
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Chain rule September 20th 2005, 10:52 AM Mathman24 Urgent help needed Hi I have this calculus question question which has caused me some trouble: $z = y + f(x^2 - y^2)$ Where f is diffentiable I need to show that $y \frac{\partial z}{\partial x} + x \frac{\partial z}{\partial y} = x$ ...
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2-cocycle twists of braided Hopf algebras up vote 10 down vote favorite 6 2-cocycle twists of Hopf algebras Let $H$ be a Hopf algebra over a field $k$. Then a (left, unital) 2-cocycle on $H$ is a map $$ f: H \otimes H \to k$$ such that $$ f(x_{(1)},y_{(1)})f(x_{(2)} y_{(2)}, z) = f(y_{(1)}, z_{(1)}) f(x, y_{(2)} z_{(...
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Projective modules over quantum groups up vote 12 down vote favorite 6 My question is short: How can one calculate $\operatorname{Tor}_{U_q(\mathfrak g)}(k,k)$? ($k$ is the ground field of characteristic zero). If we had a regular universal enveloping algebra $U(\mathfrak g)$, then of course this is just $H_\as...
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Exhibit an explicit bijection between irreducible polynomials over finite fields and Lyndon words. up vote 12 down vote favorite 5 Let $q$ be a power of a prime. It's well-known that the function $B(n, q) = \frac{1}{n} \sum_{d | n} \mu \left( \frac{n}{d} \right) q^d$ counts both the number of irreducible polynomials o...
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probability December 31st 2008, 05:41 AM #1 MHF Contributor Joined Sep 2008 From West Malaysia Posts 1,261 probability A and B plays chess everyday . The probability that A beats B in any game is twice the probability that B beats A . The probability that B beats A is three times the probability that...
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ket Bra-ket notation From Example Problems Bra-ket notation is the standard notation for describing quantum states in the theory of quantum mechanics. It can also be used to denote abstract vectors and linear functionals in pure mathematics. It is so called because the inner product of two states is denoted by a brac...
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Markov Chains Lessons Date: Thu, 18 Jul 1996 00:49:58 -0500 (EST) Subject: discrete math Eileen Schoaff Mathematics Department Buffalo State College Buffalo NY 14222 SCHOAFEM@SNYBUFAA.CS.SNYBUF.EDU The following is a set of projects that I use in my discrete mathematics course. I teach 11th grade students in a gi...
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Principle when limits level by level don't commute with simplicial structure up vote 3 down vote favorite 2 Are there general principles when a simplicial object is a (co)limit of other simplicial objects level by level, but is not a (co)limit when considering the entire simplicial structure? Objects can be groups or...
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Proving D is onto April 18th 2010, 06:46 AM #1 Newbie Joined Apr 2010 Posts 11 Proving D is onto Let $V$ be the collection of all functions whose domain is $R<br />$ and differentiable on the domain. Also, let $U$ be the collection of all functions whose domain is $R$and continuous on the domain. ...
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Lebesgue Integral January 29th 2010, 06:37 AM problem Lebesgue Integral Let $f \in L_p(X)$,1 $\le p < \infty$ and let $\epsilon > 0$. Show that there exists a set $E_\epsilon \subseteq X$ with $m(E_\epsilon) < \infty$ such that if $F \subseteq X$ and $F \cap E_\ epsilon = \phi$,then $\int_F |f|^p dm < \epsil...
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D-8 ROTATIONAL INERTIA 1. PURPOSE: (1) To demonstrate the application of energy and momentum principles to a rotating system. (2) To measure the moment of inertia of various mass distributions by a dynamical method and to verify...
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Pseudo-Geometric Series October 4th 2008, 05:59 PM #1 MHF Contributor Joined Apr 2008 Posts 1,092 Pseudo-Geometric Series Find a way to obtain an explicit formula, in terms of r such that -1 < r < 1, for $\sum_{n=1} ^{\infty} n^pr^{n-1}$, for any positive integral choice of p. Hello, icemanfan! ...
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[ -0.06494140625, 0.0002841949462890625, -0.0361328125, 0.015869140625, 0.00421142578125, -0.03173828125, -0.03955078125, 0.08349609375, 0.0078125, -0.0208740234375, -0.1640625, 0.046142578125, 0.026611328125, 0.055908203125, -0.01422119140625, -0.07958984375, 0.04931640625, -0.04614...
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Function Machine Date: 10/26/96 at 19:1:36 From: Brock Johnson Subject: Domain of a Function I am working on a chapter entitled "Functions and Limits." I know that the set of all first members is the domain and the set of all second members is the range. I don't understand how you find the domain or range of a func...
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[ 0.034912109375, -0.0048828125, -0.00013828277587890625, -0.043212890625, -0.0791015625, -0.0198974609375, -0.0927734375, 0.07177734375, -0.035400390625, -0.03369140625, -0.052001953125, 0.01171875, 0.047119140625, -0.0174560546875, 0.004364013671875, 0.033203125, -0.048095703125, -...
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