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the encyclopedic entry of Well-founded_relation In mathematics , a binary relation , R , is well-founded (or wellfounded ) on a class X if and only if every non- empty subset of X has a minimal element with respect to R ; that is, for every non- empty subset S of X , there is an element m of ...
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The Number of Students Needed for Undecided Programs at a College from the Supply-Chain Viewpoint Mathematical Problems in Engineering Volume 2012 (2012), Article ID 276519, 12 pages http://dx.doi.org/10.1155/2012/276519 Research Article The Number of Students Needed for Undecided Programs at a College from the Suppl...
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the encyclopedic entry of quantum tunneling Quantum mechanics is the study of mechanical systems whose dimensions are close to the atomic scale, such as molecules, atoms, electrons, protons and other subatomic particles. Quantum mechanics is a fundamental branch of physics with wide applications. Quantum theory general...
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Evaluating Double Integrals April 15th 2008, 04:22 AM Warrick2236 Evaluating Double Integrals Calculate the double integrals: I) IntInt R (x-y^2)dA where R is the region bounded by the curves y = x^2 and y = x^3 II) IntInt D x^3 sin(y^3)dydx where D is the region bounded by the parabo...
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Prove measurability September 8th 2011, 02:26 PM #1 Prove measurability Let $f = (f_1, f_2): \Omega \to E \times F$. Show that $f : (\Omega,\mathcal{A}) \to (E \times F, \mathcal{E} \otimes \mathcal{F})$ is measurable if and only if $f_1$ is measurable from $(\Omega,\mathcal{A})$ to $(E, \mathcal{E})$ and $f_...
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Find tan(A - B) August 25th 2008, 03:01 AM #1 MHF Contributor Joined Jul 2008 From NYC Posts 1,489 Find tan(A - B) Find tan(A - B) given the following: tanA = 5/12, pi < A < 3pi/2; sinB = -1/2, pi < B < 3pi/2 NOTE: The red above indicates the given side condition. two main ways to go a...
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Enhancement of the Quality and Robustness in Synchronization of Nonlinear Lur'e Dynamical Networks Mathematical Problems in Engineering Volume 2012 (2012), Article ID 236782, 22 pages http://dx.doi.org/10.1155/2012/236782 Research Article Enhancement of the Quality and Robustness in Synchronization of Nonlinear Lur'e...
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The Semianalytical Solutions for Stiff Systems of Ordinary Differential Equations by Using Variational Iteration Method and Modified Variational Iteration Method with Comparison to Exact Solutions Mathematical Problems in Engineering Volume 2013 (2013), Article ID 143915, 11 pages http://dx.doi.org/10.1155/2013/143915 ...
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Limits of Functions in Real Analysis October 19th 2010, 05:51 PM #1 Member Joined Oct 2010 Posts 133 Limits of Functions in Real Analysis Alright, I need some guidance with the following problem. Any help would be appreciated. Suppose $lim_{x\rightarrow x_{0}}f(x)=b$ and given any $r>0$ the set $f(B'...
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Solve System x^y=y^x x^x=y^(9y) I need this in next few hours please help :( x^2=9y^2 y=x/3 x^x=y^(9*x/3) x^x=y^(3x) I got this so far< When I use x=3y and plugin to first equation I get to 3y^y=y^(3y) I did it and i got x=0 and y=0 $x^2 = 9y^2 \therefore x = \pm 3y$. Case 1: x = 3y. $(3y)^{3y} = y^{9y} \Rightarrow 3...
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Proof of the rotation matrix Hello. Somebody knows some proof for the cosθ-sinθ sinθ cosθ rotation matrix? Ι can't compromize for the minus sign. Thanks. Last edited by konstantinos; May 28th 2013 at 01:15 AM. Say you want to rotate a point \displaystyle \begin{align*} (x, y) \end{align*} to \displaystyle \begin{alig...
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Spatial Central Configurations with Two Twisted Regular 4-Gons Journal of Applied Mathematics Volume 2013 (2013), Article ID 315976, 6 pages http://dx.doi.org/10.1155/2013/315976 Research Article Spatial Central Configurations with Two Twisted Regular 4-Gons ^1School of Electronic Engineering, UEST Of China, Chengd...
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Investigation of Through-Thickness Stresses in Composite Laminates Using Layerwise Theory International Journal of Engineering Mathematics Volume 2013 (2013), Article ID 676743, 11 pages http://dx.doi.org/10.1155/2013/676743 Research Article Investigation of Through-Thickness Stresses in Composite Laminates Using Lay...
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A Nonoverlapping Domain Decomposition Method for an Exterior Anisotropic Quasilinear Elliptic Problem in Elongated Domains Mathematical Problems in Engineering Volume 2013 (2013), Article ID 828615, 16 pages http://dx.doi.org/10.1155/2013/828615 Research Article A Nonoverlapping Domain Decomposition Method for an Ext...
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Ellipses and Circles December 7th 2010, 02:00 AM #1 Newbie Joined Oct 2010 Posts 18 Ellipses and Circles An ellipse is drawn with maximum radius 4 cm and minimum radius 3 cm. A circle is drawn, as shown in the figure, such that any two tangents of the ellipse that meet on the circle make 90⁰ with eac...
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Area of the quadrilateral 1. August 14th 2010, 12:34 AM #1 2. August 14th 2010, 10:12 AM #2 The triangles BOC, OQC, on the same base BQ, have the same "height" (namely the perpendicular distance from C to BQ). Since the area of BOC is twice the area of OQC, it follows that $BO = 2OQ$. By a similar...
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[SOLVED] Double angle problem it says to prove 1+sin2x=(sinx+cosx)^2 so I'm stuck i have tried 1+2sinxcosx=1-2sin^2x and 1+2sinxcosx=cos2x ... I need help. Thanks. $(\sin{x}+\cos{x})^2 = \sin^2{x} + 2\sin{x}\cos{x} + \cos^2{x}$ $= \sin^2{x} + \cos^2{x} + 2\sin{x}\cos{x}$ $= 1 + \sin{(2x)}$ because $\sin^2{x} + \cos^2{...
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Vector Calculus July 27th 2008, 03:23 PM #1 Newbie Joined Jul 2008 Posts 11 Vector Calculus 1) Show that the vector field F = (3x^2)i + (5z^2)j + (10yz)k is irrotional. Then find a potential function f(x,y,z) such that gradient f = F. (Ok, so i got the part of showing that F is irrotional. But when ...
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[SOLVED] Train Problem October 20th 2009, 09:50 AM warriors837 [SOLVED] Train Problem A car cruising at 65 mph, passes a train from the back to the front, in 2 minutes. At the same instant, another car, that is also traveling at 65 mph, moves from the front of the back of the train in 10 seconds. If the trai...
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The Perturbed Dual Risk Model with Constant Interest and a Threshold Dividend Strategy Abstract and Applied Analysis Volume 2013 (2013), Article ID 981076, 9 pages http://dx.doi.org/10.1155/2013/981076 Research Article The Perturbed Dual Risk Model with Constant Interest and a Threshold Dividend Strategy College of ...
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nature of roots July 18th 2009, 05:49 AM thereddevils nature of roots Determine the condition to be satisfied by k such that the expression 2x^2+6x+1+k(x^2+2) is positive for all x belongs to real numbers . Let 2x^2+6x+1+k(x^2+2)=0 (2+k)x^2+6x+1+2k=0 The graph must be a 'floating' graph on the pos...
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Using De Moivre's Theorem March 24th 2011, 12:05 PM #1 Using De Moivre's Theorem Hello, Doing a practice paper and found this question, not sure what to do: Write down de Moivre's Theorem for n=5. hence show that for $\sin \theta eq 0$ $\frac{\sin 5 \theta}{\sin \theta} = A cos^4 \theta + B \cos^2 \...
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Binomial expansions August 20th 2010, 06:35 AM hooke Binomial expansions Find, in the simplest form, the coefficient of x^n in the binomial expansion of (1-x)^(-6). Hence, find the coefficient of x^6 and x^7 in (1+2x+3x^2+4x^3+5x^4+6x^5+7x^6)^3 Attempt: The generalised binomial theorem, $\sum...
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Dynamical Behaviors of Stochastic Hopfield Neural Networks with Both Time-Varying and Continuously Distributed Delays Abstract and Applied Analysis Volume 2013 (2013), Article ID 631734, 9 pages http://dx.doi.org/10.1155/2013/631734 Research Article Dynamical Behaviors of Stochastic Hopfield Neural Networks with Both...
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opsiser You are currently browsing opsiser’s articles. Our goal is to understand the structure of subgroups of graphs of groups. This will enable us to prove things like: $F \ast_{z} F$ is LERF. Exercise 22. A group is coherent if every fg subgroup is fp. Prove that $\pi_1$ of a finite graph of groups with coherent v...
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volumes rotate about y axis April 27th 2010, 02:57 AM #1 Member Joined Dec 2008 From Australia Posts 161 volumes rotate about y axis The region of the curve $y = \frac{e^x}{x}$ bounded by x = 1 and x = 2 and y = 0, is rotated about the y axis. Find the volume of the solid. i drew the diagram and...
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basic algebra October 11th 2005, 09:41 AM >>z<< basic algebra If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20 drinks? is there a rule for this??! October 11th ...
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Global Strong Solutions to Some Nonlinear Dirac Equations in Super-Critical Space Abstract and Applied Analysis Volume 2013 (2013), Article ID 602753, 8 pages http://dx.doi.org/10.1155/2013/602753 Research Article Global Strong Solutions to Some Nonlinear Dirac Equations in Super-Critical Space Department of Mathem...
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xample Average Example 1 Problem Find the average, and average deviation for the following data on the length of a pen, L. We have 5 measurements, (12.2, 12.5, 11.9,12.3, 12.2) cm. ┏━━━━━━━━━━━━━━━━━━━━━━━┯━━━━━━━━━━━━━┯━━━━━━━━━━┓ ┃Length (cm) │ │ ┃ ┠───────────────────────┼──────────...
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Change of Basis December 2nd 2010, 07:07 AM BrianMath Change of Basis Let $V \subset R^3$ be the plane defined by the equation $2x_1 + x_2 =0. Let T:R^3 \rightarrow R^3$ be the linear transformation defined by reflecting across V. Find the standard matrix for T. This should be done using change of basis for...
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GCD question January 27th 2011, 05:38 PM #1 Junior Member Joined Nov 2010 Posts 40 GCD question if $m>0$ show that $m(a,b)=(ma,mb)$ I'm told that $(ma,mb) = max + mby = m(ax + by) = m(a,b)$ isn't sufficient... why? $\text{let} \ d=\text{gcd}(ma,mb) \ \ \text{and} \ \ c=\text{gcd}(...
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statistics problem June 9th 2008, 06:22 PM craminator66 statistics problem Thanks in advance. Consider the simple linear regression of Y, average total sleep time per 24 hour period (ASTD) on X, age of the young child (AGE). Do not use a regression program, rather run the calculations yourself on you ...
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[ -0.005035400390625, 0.0595703125, 0.01031494140625, 0.0654296875, 0.0634765625, 0.07958984375, -0.006195068359375, 0.078125, -0.03076171875, 0.0654296875, 0.041748046875, -0.08740234375, -0.046875, 0.032958984375, -0.04638671875, 0.0166015625, 0.0093994140625, -0.0390625, 0.03198...
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When an integer Z is divided by 3, it leaves 1 as a Author Message TAGS: When an integer Z is divided by 3, it leaves 1 as a [#permalink] 15 Jul 2003, 08:54 ...
4
[ -0.055419921875, 0.0595703125, -0.038818359375, 0.005584716796875, 0.0142822265625, -0.078125, 0.09033203125, 0.0162353515625, 0.053466796875, 0.0458984375, 0.00154876708984375, -0.015869140625, 0.07861328125, 0.0213623046875, -0.045654296875, -0.0030975341796875, -0.07421875, 0.01...
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proving (by induction) August 30th 2009, 08:29 AM nh149 proving (by induction) Suppose the numbers a0,a1,a2,....,an satisfy the following conditions: a0= 1/2, ak+1 =ak + (1/n) ((ak)^2) for k=0,1,2,...,n-1. Prove that (n+1)/( 2n-k+2) <ak < (n)/(2n-k ) for k=1,2,3,....,n August 30th 2009, 04:50...
5
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automorphism group of a cyclic group April 9th 2009, 03:43 PM #1 Junior Member Joined Oct 2008 Posts 36 automorphism group of a cyclic group Hi guys, Is the automorphism group of a cyclic group always abelian? I believe so but I need to prove it. I don't really know where to start...any ideas? ...
5
[ -0.08056640625, 0.031982421875, 0.060302734375, -0.000682830810546875, -0.026611328125, 0.00665283203125, 0.053466796875, -0.0771484375, -0.015380859375, 0.0361328125, 0.04736328125, -0.022705078125, -0.0238037109375, 0.030517578125, -0.00799560546875, 0.0908203125, -0.07568359375, ...
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Optimal Power Management of a DISCO with Integrations of Reliability Considerations and Wind Farm Based on Benders Decomposition Mathematical Problems in Engineering Volume 2011 (2011), Article ID 812364, 24 pages http://dx.doi.org/10.1155/2011/812364 Research Article Optimal Power Management of a DISCO with Integrat...
4
[ -0.0185546875, 0.08251953125, -0.00469970703125, 0.02001953125, -0.0028533935546875, -0.05419921875, 0.0272216796875, 0.0228271484375, 0.00506591796875, 0.03515625, 0.0225830078125, -0.0006866455078125, 0.09619140625, -0.0012054443359375, 0.021484375, 0.0400390625, -0.004425048828125...
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compute the directional derivatives November 16th 2008, 03:41 AM #1 Newbie Joined Nov 2008 Posts 3 compute the directional derivatives Hi! There is an exam on Tuesday. I have no idea of these problems. Please help~~ Thank you^^ Compute the directional derivatives of the following functio...
4
[ -0.0267333984375, 0.00048065185546875, 0.033203125, -0.1025390625, 0.036376953125, 0.01470947265625, 0.0174560546875, 0.0712890625, -0.06640625, 0.03271484375, 0.0400390625, 0.01397705078125, 0.035400390625, -0.00604248046875, -0.013671875, 0.0118408203125, -0.0927734375, -0.073242...
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Maclaurin expansion June 8th 2010, 04:54 PM #1 Newbie Joined Apr 2010 Posts 11 Maclaurin expansion A question says use Maclaurin's theorem to expand $\cos^2{x}$ upto the term containing $x^6$. Hence or otherwise, express $x+\sin^2{x}$ as a power series upto a term containing $x^6$. $f(x) = f(0)+f'(0...
5
[ -0.037353515625, 0.00677490234375, -0.0322265625, 0.1201171875, 0.0031280517578125, 0.08642578125, -0.03515625, -0.048583984375, 0.048583984375, 0.022705078125, 0.07763671875, 0.01434326171875, -0.0732421875, -0.032958984375, 0.0260009765625, -0.0205078125, -0.051513671875, 0.01049...
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The kinematics and dynamics of non-Cartesian actuators and robotics Non-Cartesian actuators are improving applications where they weren't even feasible before. Full definition of their dynamics and kinematics helps designers extract maximum performance from these systems. For years, most motion system designers wantin...
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Emerging Carbon Nanotube Electronic Circuits, Modeling, and Performance VLSI Design Volume 2010 (2010), Article ID 864165, 8 pages http://dx.doi.org/10.1155/2010/864165 Research Article Emerging Carbon Nanotube Electronic Circuits, Modeling, and Performance ^1Department of Electrical and Computer Engineering, Louisi...
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[ 0.006072998046875, 0.02587890625, -0.01092529296875, 0.047607421875, -0.0108642578125, -0.032958984375, -0.01055908203125, 0.0712890625, 0.041748046875, 0.0419921875, -0.010498046875, -0.00958251953125, 0.0361328125, 0.0004138946533203125, 0.0191650390625, 0.095703125, 0.006896972656...
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the encyclopedic entry of niels abel In mathematics , Abel's test (also known as Abel's criterion ) is a method of testing for the convergence of an infinite series . The test is named after mathematician Niels Abel . There are two slightly different versions of Abel's test – one is used with series of real...
4
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Fixed Point Theorems on Nonlinear Binary Operator Equations with Applications Discrete Dynamics in Nature and Society Volume 2014 (2014), Article ID 241942, 4 pages http://dx.doi.org/10.1155/2014/241942 Research Article Fixed Point Theorems on Nonlinear Binary Operator Equations with Applications Department of Mathe...
5
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[SOLVED] Density function October 3rd 2008, 04:41 AM #1 Newbie Joined Sep 2008 Posts 23 [SOLVED] Density function I've got this problem: f(y) = $(1/\alpha)my^{m-1}e^{{-y}^{m}/\alpha}$, y>0 0, elsewhere Now I'm supposed to find $E(Y^k)$ for any positive integer k. I start out like this: ...
5
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transformations of trigonometric graphs August 3rd 2010, 04:11 PM shimmerblade transformations of trigonometric graphs Hey guys just asking a question about transformations of trigonometric graphs h = Hcos (tπ/6) Find t when h = 2.5 H = 3 (height of the high tide in meters) T = 12 a high t...
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Homework Help Posted by Anon on Friday, January 20, 2012 at 3:34pm. QUESTION 1 Joe intercepts a pass 8 yards into the end zone, 19 yards from the right side of the field as he faces the opposite end of the field (see figure). He starts running diagonally, moving at a rate of 4 yd/s down the field and 2 yd/s across th...
4
[ -0.000010192394256591797, 0.04248046875, -0.07568359375, -0.10888671875, 0.0294189453125, 0.056640625, -0.043701171875, 0.07861328125, -0.033203125, 0.00970458984375, 0.04150390625, 0.035888671875, 0.0260009765625, 0.07421875, 0.007476806640625, 0.10693359375, -0.07861328125, -0.04...
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Absolute Value Equations ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ ┃ Absolute Value Equations ┃ ┃ Topic Index | Algebra2/Trig Index | Regents Exam Prep Center┃ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ ...
4
[ -0.0240478515625, 0.035888671875, -0.004974365234375, 0.0390625, 0.031494140625, -0.01336669921875, -0.0016326904296875, 0.0556640625, -0.0033416748046875, -0.003448486328125, 0.15234375, -0.072265625, 0.07470703125, 0.06884765625, 0.0155029296875, 0.07373046875, 0.0062255859375, -...
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Calculate the bias of the estimator March 28th 2011, 12:25 PM jmyers12345 Calculate the bias of the estimator Suppose that Y_1,...,Y_n is a random sample where the density of each random variable Y_i is f(y) = 2*x^2*y^(-3), y >= x for some parameter x > 1. Let x^hat := min{Y_1,...,Y_n}. I figured out that t...
4
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algebra problem February 11th 2008, 09:03 PM sarahh algebra problem How can we show that there are no (x,y) pairs of real numbers that satisfy xy = 3 and (x + y)^2 = 10 ? Intuitively it's obvious but I'm not sure exactly how to show it.. February 11th 2008, 09:23 PM mr fantastic Quote: Brute force: ...
4
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Topology Quotient Space May 17th 2008, 01:08 PM #1 Junior Member Joined Jul 2006 From Darmstadt, Germany Posts 44 Topology Quotient Space In Topology 2ed by Munkres, the following definition is given of a quotient map: Let $X,Y$ be topological spaces; let $p:{X}\rightarrow{Y}$ be a surjective ma...
5
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Generating functions November 13th 2009, 12:33 PM #1 Junior Member Joined Nov 2009 Posts 37 A jar of 50 quarters and 20 loonies is to be divided amongst Alex, Kim, and Julie. How many ways can this be done if Alex gets no quarters, Kim gets no loonies but at least 10 quarters, and Julie gets an od...
5
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An Adaptive Prediction-Correction Method for Solving Large-Scale Nonlinear Systems of Monotone Equations with Applications Abstract and Applied Analysis Volume 2013 (2013), Article ID 619123, 13 pages http://dx.doi.org/10.1155/2013/619123 Research Article An Adaptive Prediction-Correction Method for Solving Large-Sca...
5
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Homework Help Posted by James on Tuesday, April 8, 2008 at 8:22pm. A person deposits money into a retirement account, which pays 7% interest compounded continuously, at a rate of $1000 per year for 20 years. Calculate: a. The balance of the account at the end of 20 years b. the amount of money actually deposited int...
4
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length of curve May 19th 2007, 04:22 PM #1 Member Joined Oct 2006 Posts 88 length of curve from t=0 to t=pi/2 x=e^-t cost y=e^-t sint dx/dt = -e^-t cost - e^-t sint dy/dt = -e^-t sint + e^-t cost (dx/dt)^2 = ? (dy/dt)^2 = ? L = (int 0 to pi/2) [sqrt(-2e^-2t)]dt how do ...
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Question in Advanced Algebra November 21st 2012, 11:29 AM #1 Junior Member Question in Advanced Algebra Re: Question in Advanced Algebra it suffices to exhibit just ONE counter-example, so let's pick an easy A to work with: let A = Z+Z, the direct sum of the additive group (Z,+), where Z is the integers we...
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the encyclopedic entry of conic section In mathematics, conic sections are relations which represent the equation of the curve (or curves) that result from passing a plane through a cone. Circles Definition: The locus of all points in a plane which are equidistant from a given point. This given point is known as th...
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Finding the inverse of this function September 21st 2009, 06:32 PM letzdiscuss Finding the inverse of this function f(x) = 3 + x^2 + tan(pi(x/2)) , -1 < x < 1 I found the inverse and it was: 3 + y^2 + tan(pi(y/2)), -1 < y < 1 Correct me if I was wrong. Then the question asks me to find f(f^-1(...
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[MATLAB] Optimization - Reduce Step size? September 18th 2009, 10:42 PM elbarto [MATLAB] Optimization - Reduce Step size? Hi All, I have made a number of post lately relating to this problem so I thought I would make a decent post and highlight exactly what my problem is so that hopefully I can get some feed...
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induction and recursion October 24th 2009, 01:56 PM zpwnchen induction and recursion Quote: give a recursive definaition of the sequence { ${a_n}$} , n=1,2,3,... a) $a_n = 1+(-1)^n$ b) $a_n = n(n+1)$ c) $a_n = n^2$ help me how to define them October 24th 2009, 02:47 PM proscientia (a...
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Derivatives and Tangent Lines February 24th 2010, 09:04 AM Jools Derivatives and Tangent Lines Hey. I have a question here I was hoping to get a hand with. Determine the slope of the tangent at x = 3 for the function : f(x) = (4x^3) / sinx Note -- x is measured in radians I've gotten the deri...
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[SOLVED] Normal Distrubtion Question April 15th 2008, 10:21 PM #1 [SOLVED] Normal Distrubtion Question Question: Given that $X \sim N(44,25)$, find $t$ correct to 2 decimal places when $P(X \geq t)=0.7704$ Attempt: $= P(X \geq t)=0.7704$ $\mu = 44$ , $\sigma^2 = 25$, $\sigma= 5$ $= P(\...
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AP Statistic Confidence Intervals March 8th 2013, 04:17 PM serenamae1216 AP Statistic Confidence Intervals Please help!!! I cant figure out how to solve this The following data is the age at death (in days) for infants who died from sudden infant death syndrome (SIDS). Construct a 95% confidence interval fo...
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Multivariate Time Series Similarity Searching The Scientific World Journal Volume 2014 (2014), Article ID 851017, 8 pages http://dx.doi.org/10.1155/2014/851017 Research Article Multivariate Time Series Similarity Searching College of Computer & Information, Hohai University, Nanjing 210098, China Received 21 Februa...
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A Mathematical Model for Optimal Management and Utilization of a Renewable Resource by Population Journal of Mathematics Volume 2013 (2013), Article ID 613706, 9 pages http://dx.doi.org/10.1155/2013/613706 Research Article A Mathematical Model for Optimal Management and Utilization of a Renewable Resource by Populati...
5
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Measurement of the Quasi-Two-Body Advances in High Energy Physics Volume 2013 (2013), Article ID 989843, 4 pages http://dx.doi.org/10.1155/2013/989843 Research Article Measurement of the Quasi-Two-Body B Decays Physics Department, Semnan University, P.O. Box 35195-363, Semnan, Iran Received 13 December 2012; Revis...
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Through-Wall Image Enhancement Based on Singular Value Decomposition International Journal of Antennas and Propagation Volume 2012 (2012), Article ID 961829, 20 pages http://dx.doi.org/10.1155/2012/961829 Research Article Through-Wall Image Enhancement Based on Singular Value Decomposition Department of Electrical E...
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Of all the attendees at a dinner party, 40% were women. If Author Message TAGS: Of all the attendees at a dinner party, 40% were women. If [#permalink] 20 Dec 2006, 13:03 ...
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Proof by Induction - Divisibility Proofs September 25th 2011, 02:43 PM #1 Member Joined Jul 2011 Posts 140 Proof by Induction - Divisibility Proofs Prove by induction that 13^n - 6^(n - 2) is divisible by 7, n subset N. Step 1: n = 1... 13^1 - 6^(1 - 2) = 13 - 6^-1 = 13 - 0.1666 = 12.833 C...
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Math- Calculus Posted by Olivis on Sunday, October 21, 2012 at 11:46pm. A 20 foot ladder is sliding down a vertical wall at a constant rate of 2 feet per second. a) How fast is the ladder moving away from the wall when the base of the ladder is 12 feet away from the wall? b) Find the rate of change at which the angl...
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[Haskell-cafe] Induction (help!) Dan Weston westondan at imageworks.com Tue May 6 21:30:08 EDT 2008 Ryan Ingram wrote: > > One point to remember is that structural induction fails to hold on > infinite data structures: As I understand it, structural induction works even for infinite data structures if you remember ...
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Lipschitz Estimates for Fractional Multilinear Singular Integral on Variable Exponent Lebesgue Spaces Abstract and Applied Analysis Volume 2013 (2013), Article ID 632384, 6 pages http://dx.doi.org/10.1155/2013/632384 Research Article Lipschitz Estimates for Fractional Multilinear Singular Integral on Variable Exponen...
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Average Conditions for the Permanence of a Bounded Discrete Predator-Prey System Discrete Dynamics in Nature and Society Volume 2013 (2013), Article ID 508686, 5 pages http://dx.doi.org/10.1155/2013/508686 Research Article Average Conditions for the Permanence of a Bounded Discrete Predator-Prey System School of Mat...
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Flow Rida (m05q09) Author Message Flow Rida (m05q09) [#permalink] 12 Nov 2008, 12:23 2 This post was BOOKMARKED ...
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Squaring a radical June 28th 2011, 12:38 AM KingNathan Squaring a radical When plugging in the area of a circle formula, I ran into something I can't figure out. Lets say that the radius is (5 sqr root of 2/2) Its a fraction. When plugging it into the formula, it becomes (5 sqr root of 2/2)^2. I know the co...
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Partial Fractions July 9th 2008, 10:26 AM #1 Senior Member Joined Jul 2007 Posts 290 Partial Fractions I'm not certain why but I can't seem to get the right answer no matter how many times I run through this Integrate (x^2) / ((x - 3)(x + 2)^2) (A / x - 3) + (B / x + 2) + (C / (x + 2)^2) ...
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Index t of cyclic subgroup + isomorphism question November 7th 2012, 11:30 AM #1 Junior Member Joined Oct 2012 From Ohio Posts 48 Index t of cyclic subgroup + isomorphism question Given: the abelian group Z*13 and the element, 5, of Z*13. Find the index t of the cyclic subgroup <5>. List the t distin...
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Solving Algebraic Fractions October 16th 2010, 02:39 PM louis058 Solving Algebraic Fractions I'm having to solve some algebraic fractions, which is like normal algebra, but with fractions involved basically. I've got this: $<br /> \frac{1}{x+1}+\frac{1}{x-1}=4<br />$ And through algebra, I've got to th...
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simple simplification July 5th 2009, 12:43 PM #1 Member Joined Jun 2007 Posts 120 simple simplification Im just confused as to how this step (1) [ -ln l 150 - y l = (t / 200) - ln 130 ], simplified into this (2) l 150 - y l = 130e^(-t/200) The only part i dont understand about this is how (t/200) in...
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Stability of Impulsive Neural Networks with Time-Varying and Distributed Delays Abstract and Applied Analysis Volume 2013 (2013), Article ID 325310, 10 pages http://dx.doi.org/10.1155/2013/325310 Research Article Stability of Impulsive Neural Networks with Time-Varying and Distributed Delays ^1School of Information ...
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Differentiation- Quotient Rule Calculate the gradient of the tangent to the curve $y=\frac{x+2}{\sqrt{3x+1}}$ at $x=1$ If your question is to calculate the derivative of the function here is step by step $y=\frac{x+2}{\sqrt{3x+1}} \rightarrow y'=\frac{(x+2)'(\sqrt{3x+1}) - (\sqrt{3x+1})'(x+2)}{3x+1}$ The derivate of $...
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Homework Help Posted by Kayla on Monday, January 15, 2007 at 7:05pm. 6-x=2x+9 If you are to solve the equation for x, first try to get the variable on one side of the equation. Let's subtract 2x from both sides to start (whatever operation you do to one side of an equation you must do to the other side as well): 6 ...
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Hyperfine Structure Next: The Zeeman Effect Up: Smaller Effects Previous: The Lamb Shift To this point, the nucleus has been assumed to interact with the electron only through its electric field. However, like the electron, the proton has spin angular momentum with s=1/2, and associated with this angular momentum ...
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Calculus slope intersection September 1st 2009, 03:48 PM pantera Calculus slope intersection Can someone show me how to find the points that intersect with the graph of the function f(x) = 1-x^2 and the tangent line that goes through the point (2,0). September 1st 2009, 04:01 PM luobo Quote: The poi...
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math, correction Posted by Jasmine20 on Sunday, January 28, 2007 at 2:15am. bobpursley. i'm still questioning the problem states find the slope of any line perpendicualr to the line through points (3,3) and (2,8). y= (8-3)/(2-3) the slope i get is. (5)/(-1) for the first slope now to get any line perpendicular to t...
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normal component of accelleration September 22nd 2010, 10:57 PM heatly normal component of accelleration Iam having issues with this one iff anybody can help? Given y^2=3x^3+8x where x and y are in meters and y is positive,what is the normal component of the accelleration when x=2m,x=3m/s and x=7m/s^2. ...
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please help sin cos sqrt 2sinx + sin2x=0 for all values of x. Thank you. I'll assume that was meant to say 'solve' for all values of x. We have $\sqrt{2}\sin{x}+\sin{2x} = 0 \Rightarrow \sqrt{2}\sin{x}+2\cos{x}\sin{x} = 0 \Rightarrow \sin{x}\left(\sqrt{2}+2\cos{x}\right) = 0$. Thus either $\sin{x} = 0$ or $2\cos{x} = ...
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Limit problem (what's going wrong?) June 16th 2013, 12:17 AM #1 Newbie Joined May 2013 From Hong Kong, NOT China Posts 5 Limit problem (what's going wrong?) ${\lim _{x \to - \infty }}{\frac{4x}{\sqrt{x^{2}+4x}+x}}}$ This gives $- \infty$, which is correct. Dividing both the numerator and th...
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About pdf October 2nd 2011, 03:29 AM #1 Newbie Joined Oct 2011 Posts 8 About pdf Hello. There are 3 boys, 3 pictures and 3 car names. A task is just to connect car names into their pictures. If a boy connects car names into pictures randomly, what is a probability function on number Y of corr...
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the encyclopedic entry of broadening In atomic physics, Doppler broadening is the broadening of spectral lines due to the Doppler effect in which the thermal movement of atoms or molecules shifts the apparent frequency of each emitter. The many different velocities of the emitting gas result in many small shifts, the c...
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Posts about expected points on Code and Football July 3, 2013 Adjusted yards per attempt 101: thinking in terms of a simple scoring model. Posted by foodnearsnellville under Data, Football, Statistics | Tags: adjusted yards per attempt, expected points, Pro Football Reference, scoring model, scoring models, The Hidde...
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L'Hopital's Rule 0/0 with an integral in the numerator March 24th 2008, 04:05 PM #1 Member Joined Mar 2008 Posts 78 L'Hopital's Rule 0/0 with an integral in the numerator Find the limit as x approaches 0 of the integral of (1+sint)^(1/2)dt from 0 to x, divided by x. (x is in the denominator) This is...
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Group Classification of a Generalized Lane-Emden System Journal of Applied Mathematics Volume 2013 (2013), Article ID 305032, 12 pages http://dx.doi.org/10.1155/2013/305032 Research Article Group Classification of a Generalized Lane-Emden System ^1Department of Mathematical Sciences, International Institute for Symm...
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Get homework help at HomeworkMarket.com Question Submitted by Clay1203 on Fri, 2012-06-08 17:48 due on Fri, 2012-06-15 19:59 answered 2 time(s) Clay1203 is willing to pay $5.00 3 anonymous students showed interest Problem 1: R Chart and X-bar Chart Thermostats are subjected to rigorous testing before they are ...
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How many combinations..? May 2nd 2008, 08:23 AM #1 Newbie Joined May 2008 Posts 3 How many combinations..? Hi! i am having this difficulty at the moment. My Dad has forgotten the combination to his bicycle lock... he knows (believes) it is a combination of 44670. We have tried the more obvious ones ...
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the encyclopedic entry of power factor The power factor of an AC electric power system is defined as the ratio of the real power to the apparent power , and is a number between 0 and 1 (frequently expressed as a percentage, e.g. 0.5 pf = 50% pf). Real power is the capacity of the circuit for performing work...
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sample size May 8th 2008, 01:07 AM #1 Newbie Joined Aug 2007 Posts 19 sample size I just got a strange result... 1. I have the standard deviation = 200 2. I know the mean of the sample is at most 100 more than the mean of the population. I must find the size of the sample with 95% confidenc...
4
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How do I extract j from, B = A.(1 + j)^N + (P/j).[(1 + j)^N - 1]? I think it can be useful to use a math program to calculate that for you. i don't have any. i tried online using wolframaplha but it didn't help...it's really difficult to extract j.. Last edited by fallingleaves75; August 20th 2011 at 12:47 AM. This...
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Suprema question January 2nd 2011, 09:54 AM #1 Member Joined Dec 2010 Posts 107 Suprema question Let S,T be non-empty bounded subsets of the real numbers. Prove that $S \cup T$ is bounded above. How would you start this question? If $s\geq 0,\;t\geq 0$ are upper bounds for $S$ and $T$ respec...
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Approximation of Common Fixed Points of a Sequence of Nearly Nonexpansive Mappings and Solutions of Variational Inequality Problems Journal of Applied Mathematics Volume 2012 (2012), Article ID 902437, 12 pages http://dx.doi.org/10.1155/2012/902437 Research Article Approximation of Common Fixed Points of a Sequence o...
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Multiplying and Dividing Polynomials? Simplifying? I got the answer $36c^4b^6a^2$for the problem $(-2ab^5)(-6abc)(3c^3)$.Could you show me how you would solve these expressions? $(-3a^2b^2+7)(-6ab+2)$ $(x+3)(2x^2+7x+1)$ Last edited by deekay930; December 16th 2009 at 05:19 PM. To simplify the expression $(-3a^2b^2 + ...
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Partial differential equation with variable BC and IC August 22nd 2013, 09:13 AM berni1984 Partial differential equation with variable BC and IC Hello everyone! I have a problem with a PDE that I have to solve. I need to solve the heat equation (2nd order PDE) with respect to time and distance in a reg...
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