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What is the square of a cycle in S_7 symmetric group? December 16th 2012, 09:33 PM #1 What is the square of a cycle in S_7 symmetric group? Suppose there's a cycle $\alpha = (3714)$ in $S_7$ where $S_7$ is a symmetric group on a set $\{1, 2, \cdots, 7\}$ What is $\alpha^2$? Is it composition of $\alpha$...
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-Multiple Discrete Hardy Operators with Weights for Journal of Function Spaces and Applications Volume 2013 (2013), Article ID 121767, 9 pages http://dx.doi.org/10.1155/2013/121767 Research Article Boundedness of -Multiple Discrete Hardy Operators with Weights for ^1Kazakhstan Institute of Management, Economics and ...
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Combinatorial Interpretation of General Eulerian Numbers Journal of Discrete Mathematics Volume 2014 (2014), Article ID 870596, 6 pages http://dx.doi.org/10.1155/2014/870596 Research Article Combinatorial Interpretation of General Eulerian Numbers ^1Department of Mathematics and Statistics, Radford University, Radfo...
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\tan{2\alpha}=24/7 $\displaystyle\tan{2\alpha}=\frac{2\tan{\alpha}}{1-\tan^2{\alpha}}=\frac{24}{7}\Rightarrow 7\tan{\alpha}=12-12\tan^2{\alpha}$ $\displaystyle\Rightarrow 12\tan^2{\alpha}+7\tan{\alpha}-12=(3\tan{\ alpha}+4)(4\tan{\alpha}-3)=0$ $\displaystyle\tan{\alpha}=\frac{3}{4}, \ \frac{-4}{3}$ These are both 3,4,5...
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Factoring (Distributive Property in Reverse) We can work the distributive property in reverse—we just need to check our rear view mirror first for small children. When we rewrite ab + ac as a(b + c), what we are actually doing is factoring. A factor in this case is one of two or more expressions multiplied together....
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Please help me June 28th 2005, 03:56 PM #1 Junior Member Joined Jun 2005 Posts 58 Write an equation in slope-intercept from of a line with the following characteristics: perpendicular to the graph of 2x - 3y = 12 and passing through the point at (4,3). I'm lost here. Perpendicular lines have slo...
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specificity/sensitivity proof September 19th 2008, 01:28 PM #1 Newbie Joined Sep 2008 Posts 16 specificity/sensitivity proof Suppose that items belong to to one of two possible classes, C =0, 1 (0="negative", 1 = "positive"). Suppose that some feature X is known (measured) for each item, but the class me...
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Trigonometric identities Trigonometric identities Prove the identity 1-cos2 x= cos2 x tan2 x Hint: use t-chart Left hand side right hand side The LHS side reduces to sin^2(x), due to the LHS being an offshoot of the Pythagorean Identity sin^2(x)+cos^2(x)=1. The RHS side can be rewritten as cos^2(x)*(sin^2(x)/cos^2(x))...
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Generalized Fractional Master Equation for Self-Similar Stochastic Processes Modelling Anomalous Diffusion International Journal of Stochastic Analysis Volume 2012 (2012), Article ID 427383, 14 pages http://dx.doi.org/10.1155/2012/427383 Research Article Generalized Fractional Master Equation for Self-Similar Stochas...
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An EPQ Inventory Model with Allowable Shortages for Deteriorating Items under Trade Credit Policy Discrete Dynamics in Nature and Society Volume 2014 (2014), Article ID 476085, 10 pages http://dx.doi.org/10.1155/2014/476085 Research Article An EPQ Inventory Model with Allowable Shortages for Deteriorating Items under...
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Probability Help September 27th 2006, 07:06 PM Crimsonfear Probability Help Yeah I need some fast help... 1. A Box Contains 11 balls, numbered 1, 2, 3, 4..........11. If 6 balls are drawn simultaneously at random, what is the probability that the sum of the numbers on the ball drawn is odd. A). 100/231...
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Present Values November 4th 2009, 11:19 AM #1 Newbie Joined Oct 2009 Posts 6 Present Values Find present value as at january 2009 of a series of payments of 100 payable on first day of each month during years 2010,2011,2012. Assume effective rate of interestof 8% p.a Why is that funny? Would it be l...
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Inequalities July 25th 2009, 08:46 AM #1 Member Joined Apr 2009 From california Posts 121 Inequalities Solve 3 < l X - 5 l . When I graph this I can see the answer is 2 < X < 8 But when I try to sovle it as an inequality it doesn't work. What am I doing wrong? 3 < X -5 X > 8 ...
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Uniqueness of Improper Integral March 4th 2006, 03:38 PM ThePerfectHacker Uniqueness of Improper Integral If $f(x)$ is a countinous real function, we define, $\int^{\infty}_{-\infty}f(x)dx$ as being convergent if there exists a $a\in\mathbb{R}$ such as, $\int^{\infty}_af(x)dx$ and $\int^a_{-\infty}f(x)dx$ ar...
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Analysis question February 4th 2011, 05:04 AM #1 Member Joined Feb 2011 Posts 75 Analysis question suppose that f : (a,b)\{c} ----> real numbers is a function such that lim (x--->c+) {f(x)} and lim (x--->c-) {f(x)} both exist and are equal to a common value l. how can we prove that lim (x--->c)...
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On Semicompact Sets and Associated Properties International Journal of Mathematics and Mathematical Sciences VolumeΒ 2009Β (2009), Article IDΒ 465387, 8 pages http://dx.doi.org/10.1155/2009/465387 Research Article On Semicompact Sets and Associated Properties Department of Mathematics, Faculty of Science, The Hashem...
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Stability Analysis of Numerical Methods for a 1.5-Layer Shallow-Water Ocean Model Journal of Applied Mathematics Volume 2013 (2013), Article ID 478054, 12 pages http://dx.doi.org/10.1155/2013/478054 Research Article Stability Analysis of Numerical Methods for a 1.5-Layer Shallow-Water Ocean Model ^1Key Laboratory of...
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Frequency Diverse Array Radar Cramér-Rao Lower Bounds for Estimating Direction, Range, and Velocity International Journal of Antennas and Propagation Volume 2014 (2014), Article ID 830869, 15 pages http://dx.doi.org/10.1155/2014/830869 Research Article Frequency Diverse Array Radar Cramér-Rao Lower Bounds for Estimat...
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-Path Cover Polynomial of a Graph and a Model for General Coefficient Linear Recurrences International Journal of Combinatorics Volume 2014 (2014), Article ID 258017, 13 pages http://dx.doi.org/10.1155/2014/258017 Research Article The -Path Cover Polynomial of a Graph and a Model for General Coefficient Linear Recurr...
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How to prove that n^2 + n + 2 is even?? It's a pity to use induction n²+n+2 = (n+1)² - n + 1 n odd => (n+1)² even => (n+1)² - n + 1 even n even => (n+1)² odd => (n+1)² - n + 1 even By induction Easy for n=0 If right for n then n²+n+2 even (n+1)²+(n+1)+2 = n²+2n+1 + n + 3 = n²+n+2 +2n+2= n²+n+2 +2(n+1) Hello, NeedHelp1...
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Urgent help needed parallelogram May 24th 2010, 07:12 PM #1 Junior Member Joined May 2010 Posts 52 Urgent help needed parallelogram In parallelogram ABCD, angle A is x(x+1) and angle B is 108°. Show your work in finding the value of x $\angle{A} = \angle{C}$ and $\angle{B} = \angle{D}$. Also, t...
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Derivative (1st Principles) February 17th 2009, 02:52 PM #1 Member Joined Nov 2008 From Ontario Posts 80 Derivative (1st Principles) Find the derivative of the function using the definition of derivative. 1) x + sqrt(x) 2) 1 / sqrt(x) --------------- 1) ((x+h) + sqrt(x+h) - [x + sq...
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Collision question. May 5th 2011, 01:34 AM silvercats Collision question. 10KG ball travels at a speed(velocity) of 5ms and hits a 4KG balls which is travelling at the speed of 2ms and travelling to the same direction and 1st one.what are the velocities of two balls after the collision. take e=1/2 ...
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sequence of polynomials May 1st 2010, 11:56 AM #1 Junior Member Joined Jul 2009 Posts 67 sequence of polynomials let $<br /> \left\{ {p_n } \right\}<br /> <br />$ be a sequence of polynomials of real variable defined by $<br /> p_1 = 0<br /> <br />$ $<br /> p_{n + 1} = \frac{1}{2}(x + 2p_n (x) ...
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Ring Homomorphism September 21st 2010, 01:57 AM #1 Member Joined Dec 2009 Posts 224 Ring Homomorphism (a) What does the question mean by 'determining the kernel'? I know that kernels are ideals and ideals are kernels. Since $\varphi$ is a ring homomorphism from $R \to \mathbb{Z}$, then $ker(\ va...
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Please help me out here about Independent Events November 4th 2007, 02:30 AM #1 Member Joined Oct 2007 Posts 145 Please help me out here about Independent Events Given 2 events A and B, is it possible that B is independent of A, but A is positively dependent on B (A is more likely to occur given that B h...
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Notes on the Global Well-Posedness for the Maxwell-Navier-Stokes System Abstract and Applied Analysis Volume 2013 (2013), Article ID 402793, 6 pages http://dx.doi.org/10.1155/2013/402793 Research Article Notes on the Global Well-Posedness for the Maxwell-Navier-Stokes System ^1Department of Mathematics, Chosun Unive...
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Strong induction proofs December 11th 2012, 01:13 AM cloudNINEresident Strong induction proofs i'm having trouble understanding strong induction proofs i understand how to do ordinary induction proofs and i understand that strong induction proofs are the same as ordinary with the exception that you have to a...
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Marginal distribution April 12th 2008, 04:58 AM matty888 Marginal distribution For the following joint distribution ---Y X- 1-- 2 0 .02 .08 1 .11 .44 2 .07 .28 (i) Calculate the marginal distribution for each of X and Y (ii) Find a) P(X >= 1) b) P(X = 1 | Y = 2) (iii) ...
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Simply expression January 11th 2010, 01:07 AM #1 Super Member Joined Dec 2008 Posts 509 Simply expression Hi Can someone help me simplify this expression. i tired using different identities but still cannot get the answer. $sec^2(x)+cosec^2(x)-sec^2(x)cosec^2(x)$ P.S Last edited by Paym...
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Rocket Physics Picture of Saturn V Launch for Apollo 15 Mission . Source: NASA Rocket physics, in the most basic sense, involves the application of Newton's Laws to a system with variable mass. A rocket has variable mass because its mass decreases over time, as a result of its fuel (propellant) burning off. A ro...
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integral for cos(xt)/(1+t) dt i need to show it with leibnez rule but i cant find how Lets start evaluating the indefinite integral... $\varphi (x, t)= \int \frac{e^{x t}}{1+t}\cdot dt$ (1) Setting $1+t=\tau$ You obtain first the integral... $\varphi (x,\tau) = e^{-x} \int \frac{e^{x \tau}}{\tau}\cdot d\tau$ (2) ... a...
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Periodicity and Permanence of a Discrete Impulsive Lotka-Volterra Predator-Prey Model Concerning Integrated Pest Management Discrete Dynamics in Nature and Society Volume 2013 (2013), Article ID 767526, 10 pages http://dx.doi.org/10.1155/2013/767526 Research Article Periodicity and Permanence of a Discrete Impulsive ...
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[ -0.00750732421875, 0.055419921875, 0.037109375, 0.0216064453125, 0.037841796875, -0.07177734375, -0.03125, -0.03369140625, 0.0361328125, 0.05224609375, 0.06640625, -0.0673828125, 0.0311279296875, 0.04052734375, 0.006866455078125, 0.05859375, 0.033203125, -0.04736328125, 0.0336914...
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Factorise the Following Please can someone help in factorising the following quadratic using simple factors.... 20x^2+7x-6 Thanks in advance. JP Last edited by jp.101; December 23rd 2008 at 09:37 AM. Factoring $20x^2+ 7x- 6$ means finding (ax+ b)(cx+ d) so that the product, $acx^2+ (ad+ bc)x+ bd$ is equal to that. Th...
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Sum/Product Rule Question April 7th 2009, 06:03 PM #1 Newbie Joined Mar 2009 Posts 6 If you could help solve this just using addition and multiplication (sum and product rule) it would be greatly appreciated!!! Thank you in advance! Question: In how many ways can a photographer at a wedding arrange 6...
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Mean Value Theorem for integrals w/ log December 2nd 2011, 12:30 AM #1 Member Joined Sep 2011 Posts 106 Thanks 1 Mean Value Theorem for integrals w/ log An arched shaped monument is 570 ft high and has a 600 ft base. It can be modeled by the function $y=1140-285(e^{0.00439x}+e^{-0.00439x})$ where th...
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random variable of continuous type April 17th 2009, 11:21 AM #1 Banned Joined Feb 2009 Posts 97 random variable of continuous type Let R(t)= ln M(t), where M(t) is the moment-generating function of a random variable of the continuous type. How do you show the following? a) $\mu=R'(0)$ b) $\sigma^...
5
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Infinite nested radicals June 15th 2008, 09:23 PM #1 Junior Member Joined Jun 2008 Posts 54 Infinite nested radicals Find the limit of the following expression if it converges: $\sqrt {1 + \sqrt {2 + \sqrt {3 + ...}}}$ Also find a recurrence representation of the expression. the limit is cal...
5
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Optimal Energy Control Strategy Design for a Hybrid Electric Vehicle Discrete Dynamics in Nature and Society Volume 2013 (2013), Article ID 132064, 8 pages http://dx.doi.org/10.1155/2013/132064 Research Article Optimal Energy Control Strategy Design for a Hybrid Electric Vehicle National Engineering Laboratory for E...
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Asymptotic Modeling of Coherent Scattering from Random Rough Layers: Application to Road Survey by GPR at Nadir International Journal of Antennas and Propagation Volume 2012 (2012), Article ID 874840, 9 pages http://dx.doi.org/10.1155/2012/874840 Research Article Asymptotic Modeling of Coherent Scattering from Random...
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population growth problem February 18th 2013, 12:32 AM #1 population growth problem dy/dx=1-0.2y, solve for y when y=0, x=0 This is how I solved it dy/(1-0.2y)=dx <=> -5* (-0.2dy/1-0.2y)=dx integrating the equation, ln(abs) 1-0.2= x+c/-5 1-0.2y=e^(-x/5+c) <=> 1-0.2y=ce^-x/5 My final equation is y=...
5
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Using differentials in an applied problem August 5th 2010, 12:01 PM #1 Member Joined Feb 2010 From United States Posts 155 Thanks 1 Using differentials in an applied problem Use differentials to estimate the amount of paint needed to apply a coat of paint 0.05 cm thick to a hemispherical dome wit...
5
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Solve using de Moivre's theorem: z^3=i November 27th 2012, 07:50 PM #1 Newbie Joined Nov 2012 From Jamaica Posts 5 Solve using de Moivre's theorem: z^3=i Hi! So I have to find the solutions to the following equation using de Moivre's theorem: z^3=i Here's my attempt at solving: z^3=i z^...
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Sum of a series April 25th 2010, 07:11 PM #1 Junior Member Joined Feb 2010 Posts 45 Sum of a series & maclin series So I have written down some notes, and I have forgotten why i wrote what i wrote down. Find the sum of the series $\sum_{n=1}^\infty nx^n$ I wrote down these steps $\sum...
5
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Homomorphisms and Factor Rings February 21st 2013, 02:24 AM #1 Homomorphisms and Factor Rings Let $\phi : R \rightarrow R'$ be a ring homomorphism and let N be an ideal of R (a) Show that $\phi [N]$ is an ideal of $\phi [R]$ (b) Give an example to show that $\phi [N]$ need not be an ideal of R' (c)...
5
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A Bayesian Approach to Multistage Fitting of the Variation of the Skeletal Age Features Journal of Biomedicine and Biotechnology Volume 2009 (2009), Article ID 623853, 7 pages http://dx.doi.org/10.1155/2009/623853 Methodology Report A Bayesian Approach to Multistage Fitting of the Variation of the Skeletal Age Featur...
4
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Multilevel Thresholding Segmentation Based on Harmony Search Optimization Journal of Applied Mathematics Volume 2013 (2013), Article ID 575414, 24 pages http://dx.doi.org/10.1155/2013/575414 Research Article Multilevel Thresholding Segmentation Based on Harmony Search Optimization ^1Departamento de Ingeniería del So...
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[ -0.0203857421875, 0.035400390625, 0.05078125, -0.078125, 0.016357421875, -0.0634765625, -0.049072265625, -0.00360107421875, -0.01226806640625, -0.037841796875, -0.036865234375, -0.022705078125, 0.1103515625, -0.026123046875, -0.0238037109375, 0.00799560546875, 0.017822265625, 0.051...
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logs in terms of x & y April 22nd 2008, 08:58 AM #1 Newbie Joined Apr 2008 Posts 10 logs in terms of x & y Log (p^8q^6) = Log p^-6/q^-2 = Log p^3/Log q^7 = (Log p^9)^-9 = expand as much as possible, then replace each log with x and y. i need help! puhhleeez you haven't poste...
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[ -0.0054931640625, 0.06787109375, 0.0081787109375, 0.023193359375, 0.0030364990234375, -0.0093994140625, 0.035400390625, -0.00653076171875, 0.06298828125, 0.018310546875, 0.033935546875, 0.058837890625, -0.053466796875, 0.0927734375, 0.07763671875, 0.09228515625, -0.138671875, 0.078...
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A Fuzzy Dropper for Proportional Loss Rate Differentiation under Wireless Network with a Multi-State Channel Mathematical Problems in Engineering Volume 2012 (2012), Article ID 827137, 16 pages http://dx.doi.org/10.1155/2012/827137 Research Article A Fuzzy Dropper for Proportional Loss Rate Differentiation under Wire...
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Viscosity Approximations by the Shrinking Projection Method of Quasi-Nonexpansive Mappings for Generalized Equilibrium Problems Journal of Applied Mathematics Volume 2012 (2012), Article ID 235474, 30 pages http://dx.doi.org/10.1155/2012/235474 Research Article Viscosity Approximations by the Shrinking Projection Met...
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[ -0.021728515625, -0.00579833984375, 0.0703125, -0.038818359375, -0.0242919921875, 0.00860595703125, -0.0205078125, 0.054931640625, 0.038330078125, 0.00051116943359375, 0.01251220703125, -0.03173828125, 0.06005859375, 0.0016021728515625, -0.038818359375, -0.080078125, 0.0296630859375,...
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Find the probability questions December 6th 2006, 03:17 PM jenneedshelp Find the probability questions Hey I was wondering if anyone could help me out with these two questions: Find the probability of: 1) a five-card poker hand dealt from a standard deck of 52 playing cards results in full house (3 of ...
5
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diagram 3D December 15th 2011, 07:42 PM ahmedb diagram 3D question: while standing at the left corner of the schoolyard in front of here school, Suzie estimates that the fronth face is 8.9m wide and 4.7 high. From her position. Suzie is 12.0m from the base of the right exterior wall. She determines that the ...
4
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vector and parametric equations problem September 12th 2009, 07:40 PM #1 Junior Member Joined Aug 2009 Posts 33 Given two points P(1, 7) and Q(−2,−3) there exists a line which goes through these two points. This line intersects the x-axis at the point x_0 = (x_0, 0). Find the general, vector and ...
4
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the encyclopedic entry of inexact In thermodynamics , an inexact differential or imperfect differential is any quantity, particularly heat Q and work W, that are not state functions , in that their values depend on how the process is carried out. The symbol , or δ (in the modern sense), which originated f...
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integration What is the integal of e^(x^2)x^4 from negative infinity to infinity? Thank you! Hello, The function is an even function ie $f(x) = e^{x^2} x^4 = e^{(-x)^2} (-x)^4 = f(-x)$ ---------> $\int_{- \infty}^{+\infty} f(x) dx = 2 \int_{-\infty}^0 f(x) dx$ Now, let's integrate. At first sight, you have to use the ...
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Help with Derivatives February 20th 2009, 06:55 PM #1 Newbie Joined Feb 2009 Posts 8 Help with Derivatives I need some help solving these derivative problems: 1. F(x)= 3rd root of(x)-[1/3rd root of(x)] For this one I got: 1/3 x - 3rd root of(9) 2. (s^2+s+1)^4 * (s-2)^7 I tried doing thi...
5
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Uniform Estimates for Damped Radon Transform on the Plane Abstract and Applied Analysis Volume 2013 (2013), Article ID 582137, 5 pages http://dx.doi.org/10.1155/2013/582137 Research Article Uniform Estimates for Damped Radon Transform on the Plane Department of Mathematics, Ajou University, Suwon 443-749, Republic o...
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Linear Trig Equation help plz! November 15th 2007, 07:08 AM #1 Junior Member Joined Sep 2007 Posts 55 Linear Trig Equation help plz! 2. Find all solutions of each equation. a) cot x = 2.3 (I can find it with special angles, but not this) b) 5 cos 3x = -3 3. c) 2sinx - 1 = -2 You people ...
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Statistical Convergence of Double Sequences of Order Journal of Function Spaces and Applications Volume 2013 (2013), Article ID 682823, 5 pages http://dx.doi.org/10.1155/2013/682823 Research Article Statistical Convergence of Double Sequences of Order Department of Mathematics, Fırat University, 23119 Elazığ, Turkey...
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Differential Systems with Quadratic Right-Hand Abstract and Applied Analysis Volume 2011 (2011), Article ID 154916, 23 pages http://dx.doi.org/10.1155/2011/154916 Research Article Instable Trivial Solution of Autonomous Differential Systems with Quadratic Right-Hand Sides in a Cone ^1Department of Complex System M...
5
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Interval Notation Check October 24th 2008, 03:45 PM #1 Newbie Joined Oct 2008 Posts 1 Interval Notation Check Solve the compound inequality: 3x >= -4x+2 and 5 >= 3x-4 Could someone check my work I am not sure if my interval notation is right. My solution: x>=2/7 & x<3 Give the resul...
4
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complex numbers $P (Z_1)$ and $Q (Z_2)$ are complex numbers in argand diagram and $O$ is the origin. show $OP$ and $OQ$ are perpendicular if $|Z_1 - Z_2| = |Z_1 + Z_2|$ Hello, stud_02! How about a geometric proof? $P (Z_1)$ and $Q (Z_2)$ are complex numbers in argand diagram and $O$ is the origin. Show $OP$ and $OQ$ a...
5
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help finding the dirivative January 29th 2008, 01:48 PM #1 Junior Member Joined Nov 2007 From california Posts 74 help finding the dirivative Hi i am trying to find the dirivtive of (4-x^2)^(1/2). I know that i need to use u subsitution and u=4-x^2. Then i get d/dx[u^(1/2)](-2x) then i get stuck, can...
5
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Some Upper Matrix Bounds for the Solution of the Continuous Algebraic Riccati Matrix Equation Journal of Applied Mathematics Volume 2013 (2013), Article ID 792782, 9 pages http://dx.doi.org/10.1155/2013/792782 Research Article Some Upper Matrix Bounds for the Solution of the Continuous Algebraic Riccati Matrix Equati...
5
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Some Properties of a Generalized Class of Analytic Functions Related with Janowski Functions Abstract and Applied Analysis Volume 2012 (2012), Article ID 279843, 11 pages http://dx.doi.org/10.1155/2012/279843 Research Article Some Properties of a Generalized Class of Analytic Functions Related with Janowski Functions...
5
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Boundaries and areas..not sure if I did it right. February 15th 2010, 05:56 PM #1 Junior Member Joined Dec 2009 Posts 55 Boundaries and areas..not sure if I did it right. Consider the boundaries of the shaded region given (see attached graph). Find the area A of this region by writing x as a func...
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When 10 is divided by the positive integer n, the remainder Author Message TAGS: Re: Number properties question from QR 2nd edition PS 164 [#permalink] 06 Mar 2011, 15:54 ...
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Approximation for large Catalan Numbers September 13th 2010, 07:20 AM #1 Senior Member Joined Apr 2009 Posts 306 Approximation for large Catalan Numbers Show that for a very large $m$, $C(m) \approx \frac{4^m}{m^{\frac{3}{2}} \times \sqrt{\pi}}<br />$ where $C(m)$ denotes the mth catalan number. ...
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Treatise On Analysis Vol-Ii 366 XV NORMED ALGEBRAS AND SPECTRAL THEORY have a = ae' (15.8.3(iii)), and on the other hand a = g(e2) = eg(e) = ea, so that ae eAer, and g =fa. It is clear that eAe' c: eA n Ae'; conversely, if y e eA n Ae!, then j; = j>e' and y = ey (15.8.3(iii)), so that y = eye' e eAe'. The im...
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Collision Attacks on AES-192/256, Crypton-192/256, mCrypton-96/128, and Anubis Journal of Applied Mathematics Volume 2013 (2013), Article ID 713673, 10 pages http://dx.doi.org/10.1155/2013/713673 Research Article Collision Attacks on AES-192/256, Crypton-192/256, mCrypton-96/128, and Anubis ^1Center for Information ...
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Solving Rational Expressions October 28th 2009, 01:25 AM henryW Solving Rational Expressions Hi, I am having trouble understanding how to answer questions like this: $<br /> -2=<br /> \frac {1}{5}y-1<br />$ or $<br /> \frac {-5}{2y}= \frac {1}{4}<br />$ October 28th 2009, 02:26 AM Debsta ...
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Estimation for Stochastic Nonlinear Systems with Randomly Distributed Time-Varying Delays and Missing Measurements Mathematical Problems in Engineering Volume 2012 (2012), Article ID 890512, 15 pages http://dx.doi.org/10.1155/2012/890512 Research Article Estimation for Stochastic Nonlinear Systems with Randomly Distr...
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Intro Calc HW April 3rd 2008, 03:05 AM #1 Newbie Joined Feb 2007 From Australia Posts 20 Intro Calc HW logs---- if $10000 is invested at an interest rate compounded annually the investment will grow to $P after x years where P=10 000(1.08)^x d) how long will it take for the ionvestment...
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Vectors help! March 31st 2008, 12:27 AM #1 Junior Member Joined Feb 2008 Posts 60 Vectors help! Hello. I'm currently having some problems on this question on vectors. If you could help me, it'll be great. ----- Vector AC is [2,4,-3] and it forms the hypotenuse of a right angled triangle of tran...
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Trig Identities November 12th 2006, 04:40 PM #1 Newbie Joined Nov 2006 Posts 3 Trig Identities Solve for $0\leq x \leq 2\pi$ well i am bad at the math tool, but its 0<=x<=2pi Cos2x = 1 - sinx What would be the best way to set this up? Hi Adam. Use the identity that $\cos(2x) = 1 ...
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Work - kinetic energy theorem Work - kinetic energy theorem is a generalized description of motion - not specific to any force type like gravity or friction. We shall, here, formally write work - kinetic energy theorem considering an external force. The application of a constant external force results in the change in ...
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Quotient Rule - Can't get correct answer August 9th 2009, 07:35 AM Macca567 Quotient Rule - Can't get correct answer Hey, Got a Maths exam tomorrow and I'm having a bit of trouble trying to get the answer given in the back of the book for this problem: I have to differentiate this: x/(x+1)^1/2 The answ...
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Rate of change question December 13th 2010, 04:14 PM liukawa Rate of change question Hi Guys, Am currently stuck with this rate of change question. question is as per attached file. Please help thanks ! December 13th 2010, 08:57 PM liukawa up for help guys ! Thanks ! December 13th 201...
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Transforming integral in cartesian coordinates to polar coordinates September 23rd 2010, 02:46 PM #1 Member Joined Oct 2009 Posts 195 Thanks 1 Transforming integral in cartesian coordinates to polar coordinates x^2 + y^2 is of course a circle, but my book is very unclear on how to switch the coordina...
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-Baskakov-Beta-Stancu Type Operators Journal of Calculus of Variations Volume 2013 (2013), Article ID 814824, 8 pages http://dx.doi.org/10.1155/2013/814824 Research Article Some Approximation Properties of -Baskakov-Beta-Stancu Type Operators ^1Department of Applied Mathematics and Humanities, Sardar Vallabhbhai Nat...
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Using Averaged Modeling for Capacitors Voltages Observer in NPC Inverter Advances in Power Electronics Volume 2012 (2012), Article ID 176876, 11 pages http://dx.doi.org/10.1155/2012/176876 Research Article Using Averaged Modeling for Capacitors Voltages Observer in NPC Inverter Power Electronics Group, Université de...
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Torsion subgroups in families of twists of elliptic curves up vote 9 down vote favorite 5 Here is the short version: Fix an elliptic curve $E/\mathbb{Q}$. How does the torsion structure $E_d(\mathbb{Q})_{tors}$ vary, as $E_d$ runs through the quadratic twists of $E$? Here is the longer version: I have been pla...
5
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UWB Localization System for Indoor Applications: Concept, Realization and Analysis Journal of Electrical and Computer Engineering Volume 2012 (2012), Article ID 849638, 11 pages http://dx.doi.org/10.1155/2012/849638 Research Article UWB Localization System for Indoor Applications: Concept, Realization and Analysis I...
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Lagrange's four square theorem Posted by: Steven Sam | February 10, 2009 Lagrange’s four square theorem I wanted to present a proof of Lagrange’s four square theorem that I had seen a few years ago that I really like. I think there’s also some approaches using analytic number theory and algebraic number theory, but t...
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limits of sequences October 11th 2006, 01:04 PM #1 Newbie Joined Oct 2006 Posts 2 limits of sequences a, Let q be the element of real numbers with q which is not equal to 0. Show that if the absolute of q is less than 1, then the limit of an absolute of q^n=0 as lim approaches positive infinity. ...
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Completing the square of a sphere January 4th 2010, 06:14 PM #1 Completing the square of a sphere Hey, I've got this equation and I was wondering what the steps are to get the answer becuase I got something different to the answer. x^2 + y^2 + z^2 + 4x − 6y + 2z + 6 = 0 Complete the square to find t...
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Characterizing Two-Dimensional Maps Whose Jacobians Have Constant Eigenvalues http://dx.doi.org/10.4153/CMB-2003-034-4 Canad. Math. Bull. 46(2003), 323-331 Published:2003-09-01 Printed: Sep 2003 • Marc Chamberland Recent papers have shown that $C^1$ maps $F\colon \mathbb{R}^2 \rightarrow \mathbb{R}^2$ whose Jacobi...
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Further Results on Colombeau Product of Distributions International Journal of Mathematics and Mathematical Sciences Volume 2013 (2013), Article ID 918905, 5 pages http://dx.doi.org/10.1155/2013/918905 Research Article Further Results on Colombeau Product of Distributions ^1Faculty of Electrical Engineering and Info...
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Quadratics Help! January 5th 2013, 06:43 AM #1 Newbie Joined Jan 2013 From Florida Posts 1 Quadratics Help! I have tried the quadratic formula and also completing the square(sorta). Im Stuck Please help. (questions are not in standard form yet) 6x^2 = 4 - 5x 4x^2 + 2x = 5 9(x ...
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Help with related rates problem (calculus I) May 3rd 2009, 11:22 AM #1 Newbie Joined May 2009 Posts 11 Help with related rates problem (calculus I) Two boats are racing with constant speed toward a finish marker, boat A sailing from the south at 13mph and boat B approaching from the east. When equidistan...
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Proving a summation October 15th 2013, 07:10 AM #1 Junior Member Joined Jul 2012 From Morocco Posts 25 Proving a summation Dear all, how can I prove the following summation (See attachment)? I tried to use integrals but the result was kind of broad. Attachment 29481 Re: Proving a summation ...
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the encyclopedic entry of Zorn's lemma Zorn's lemma, also known as the Kuratowski-Zorn lemma, is a proposition of set theory that states: Every partially ordered set in which every chain (i.e. totally ordered subset) has an upper bound contains at least one maximal element. It is named after the mathematician Max...
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Derivative of a function wrt to another function August 21st 2012, 12:23 AM albox Derivative of a function wrt to another function I have 3 sets called A,B and C. Each set is a union of 2 non intersecting subsets, i.e. : $A = \{A1 \cup A2\}, A1 \cap A2 = \emptyset$ $B = \{B1 \cup B2\}, B1 \cap B2 = \empt...
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Laplace Transform July 14th 2010, 06:21 PM #1 Junior Member Joined Oct 2008 Posts 41 Laplace Transform I'm looking at my old Differential Equations textbook and struggling with a sticky point regarding Laplace transforms. He defines the Laplace transform in the standard way, saying that the Laplace ...
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How did this happen? October 17th 2013, 08:01 PM #1 Newbie Joined Oct 2013 From Arcata Posts 3 How did this happen? I am maximizing and minimizing the optimum. Once I had this quadratic function, f(x)=-[x^2-4x+4-4-2] the book says I factor it into vertex form. Giving me two equations in vertex form, ...
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trig function differenciation August 5th 2012, 08:40 PM #1 Junior Member Joined Jul 2012 From auckland Posts 46 trig function differenciation if y= 3sin(2x+3) show that y"+4y=0 and if y= sinx + 2cosx show that y", + y""+y, +y =O can some1 explain to me how to do these and solve them ...
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t^3-3t+1 splits or is irreducible April 15th 2010, 07:14 PM #1 Newbie Joined Feb 2010 Posts 12 t^3-3t+1 splits or is irreducible Prove that for any field K, $t^3-3t+1$ splits or is irreducible in K. Hint: show that any zero is a rational expression in any other zero. Using the formula for the s...
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Concavity. September 4th 2009, 08:19 PM #1 Member Joined Jul 2009 Posts 149 Concavity. I have a question that asks , ''for what values of x is the function concave?" Im unsure as to what this is asking, is it just asking if $f''(x) < 0$ the function is concave. and $f''(x) > 0$ the function is conve...
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Orthogonal Vectors in a plane June 14th 2013, 11:58 PM linalg123 Orthogonal Vectors in a plane Find two orthogonal vectors in the plane containing the points A(-5,3,-4) B(-4,-3,-1) and C(-2,5,3) Ok so i have that AB = <1,-6,3> AC = <3,2,7> AB X AC = n = determinant of the 3x3 matrix = -48i + 2j...
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[SOLVED] Gmat question... February 7th 2008, 06:27 PM #1 aj82da6 Guest [SOLVED] Gmat question... I need help with this problem from my practice gmat.. (1/5)^m times (1/4)^18 = 1/(2(10)^35) and we are trying to find m thank you for your help $\left( \frac 15 \right)^m \cdot \left( \frac 14 \rig...
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