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transformation function of random variables September 29th 2009, 06:14 AM #1 Newbie Joined Sep 2009 Posts 12 transformation function of random variables If X and Y are exponentially distributed with the same parameter and they are also independent: To compute the density function of : Case 1) Z...
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EM field integral September 30th 2013, 10:46 PM #1 Junior Member Joined Dec 2012 From ny Posts 63 Thanks 6 EM field integral this is the E field above a square loop with side=a at distance z on the z axis. by symmetry the Ex, Ey field cancel out. it really kind of bothers me that I can't see this...
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square circle October 25th 2007, 09:11 AM #1 Newbie Joined Oct 2007 Posts 9 square circle The perimeter of a semi-circle is same as the perimeter of a square . Than whether the area of the semi-circle is greater than area of square or vice versa???? Hello, saroja! The perimeter of a semicircle ...
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equations system February 29th 2008, 12:55 AM #1 Newbie Joined Feb 2008 Posts 3 ive been trying to answer these questions all night, 19 of them for homework and ive got 8 done. only 8 to go... 10. Solve the following systems of equations by substitution. Show your work. a) y= 2x+10 y = 130 ...
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Derivatives of Inverse Functions November 12th 2009, 01:37 AM #1 Newbie Joined Nov 2009 Posts 5 Derivatives of Inverse Functions Let f(v) be the gas consumption (L/km) of a car going at velocity v (km/h). In other words, f(v) tells you how many liters of gas the car uses to go one kilometer, if it is goi...
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Surface Area (Calculus) May 28th 2007, 09:27 PM turtle Surface Area (Calculus) I'm getting confused on this problem, such as when to use dy and dx. If someone can please help me solve these problems and explain them, I would greatly appreciate it. Thank you. Find the surface area generated by revolving the ...
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Integral Question using Fundamental Theorem of Calculus November 29th 2010, 11:45 AM #1 Newbie Joined Nov 2010 Posts 11 Integral Question using Fundamental Theorem of Calculus Hi everyone, I am working on this question for calculus, but I am a bit confused by the y's in the range of the integral. ...
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Infinite-D problem January 26th 2008, 02:34 PM #1 Super Member Joined Mar 2006 Posts 705 Thanks 2 Infinite-D problem Let V be the set of real numbers regarded as a vector space over the field of rational numbers. Prove that V is infinite-dimensional. I'm trying to prove by contradiction. I selec...
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Intermediate/Advanced Factoring I know I've done things like this before, but I don't have my book on hand and I've forgotten quite a bit over summer. I've been looking online and can't find any problems similar to this. :/ Help please? 1. Factor 2. Factor For number two I got an answer of (x+7)^1/4[1+(x+7)^1/2]... ...
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Finding an expression for charge (Q) given an I-V equation P: 492 An ideal semiconductor diode is a nonlinear element that obeys the following I-V equation: [tex]I\,=\,I_s\,\left(\,e^{\frac{V}{V_{th}}}\,-\,1\right)[/tex] where [itex]I_s[/itex] is a constant (saturation current) and [itex]V_{th}[/itex] is a constant ...
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Trying to determine the height of a weather balloon. I think i have it right December 10th 2011, 10:11 AM #1 Newbie Joined Nov 2011 Posts 22 Trying to determine the height of a weather balloon. I think i have it right Two observers 5000m apart, standing at A and B measure the angle of elevation to a weat...
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logarithmic word problem April 30th 2012, 09:26 PM #1 Newbie Joined Apr 2012 From Canada Posts 5 logarithmic word problem Hello, here is my problem: Alex invests $50,000 at an interest rate of 0.7% compounded monthly. Laura invests $40,000 at 9.5% compounded annually. After how many years will t...
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Momentum/impulse check & help needed Register to reply by JWDavid Tags: check, momentum or impulse P: 23 1. The problem statement, all variables and given/known data A 52.4 g ball is thrown from the g...
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Writing an algebraic equation February 28th 2007, 09:36 PM #1 Writing an algebraic equation Subtract 5 from the sum of x and 7 times 3 and the result is 20. My answer is x-5 + 7 x 3 = 20 x = 4 is that right? Is that exactly how the question was phrased? if so, i'd interpret it like this: ...
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Power series - Differential equation March 26th 2011, 01:08 AM #1 Member Joined Nov 2009 Posts 177 Power series - Differential equation Seek the solutions that are power series to the differential equation: $(1-z)f'(z)=2f(z),\ f(0)=1$ I assume we first need to assume that $|z|<R$ so that $f(z)=\...
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Evaluate this integral February 22nd 2013, 12:34 PM #1 Member Joined Dec 2012 From NY Posts 105 Thanks 1 Evaluate this integral Evaluate the integral. (Give your answer as an improper fraction.) Ok my work: b/c of abs value law x { x when x>/= to 0 { -x when x<0 Intergral from...
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finding x when it appears in the equation more than once August 22nd 2011, 11:15 PM #1 Junior Member Joined Aug 2008 Posts 26 finding x when it appears in the equation more than once Hi, this is the first time I have come across a question where x has appeared in an equation more than once so I am a bit ...
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Semientwining Structures and Their Applications ISRN Algebra Volume 2013 (2013), Article ID 817919, 9 pages http://dx.doi.org/10.1155/2013/817919 Research Article Semientwining Structures and Their Applications ^1Institute of Mathematics “Simion Stoilow” of the Romanian Academy, P.O. Box 1-764, 014700 Bucharest, Rom...
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integration of an absolute value function?? November 27th 2008, 05:06 PM #1 Newbie Joined Nov 2008 Posts 21 integration of an absolute value function?? I'm very stuck on this problem because when I did it the way I thought it was supposed to be done I ended up with an answer of zero which definitely isn'...
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Physics problem on mechanics November 4th 2007, 09:21 AM #1 Member Joined Jul 2007 Posts 147 Physics problem on mechanics I have a following problem A rock is dropped from a sea cliff. After 3.4 s a splash of the rock hitting the ocean is heard. The speed of sound is 340 m/s. How tall is the cliff? ...
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Examples of Rewrite Rules - GNU Emacs Calc Manual 11.11.13 Examples of Rewrite Rules Returning to the example of substituting the pattern ‘sin(x)^2 + cos(x)^2’ with 1, we saw that the rule ‘opt(a) sin(x)^2 + opt(a) cos(x)^2 := a’ does a good job of finding suitable cases. Another solution would be to use the rule ‘cos...
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Summation formula February 25th 2011, 02:23 PM #1 Member Joined Nov 2010 Posts 86 Summation formula Some help with the following would be appreciated! Find (and prove) a formula for Σ from j=1 to k of j^3 Known propositions: Σ from j=1 to k of j = k(k+1) / 2 Σ from j=1 to k of j^2 = k...
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What am I doing wrong? December 6th 2012, 03:09 PM Nervous What am I doing wrong? Integrate f(x)=2x. Lower limit is 1 and upper limit is 2. Using the shortcuts, it's easy for me to find F(2) - F(1) = 3. However, I was asked to use the limit of Reinmann sums in order to solve the problem... $\int f...
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The potential ability of TC back see; A*(2)=A x A examples; 2*(2)=4, 4*(1/2)=2, (4/9)*(1/2)=2/3, 3(4/9)*(1/2)=2, k4*(1/2)=2k //About the correlativity of energy multiplying phenominon of Tesla Coil and Hutchison effect //Generally, we make the tank circuit to oscillate cosine-curved electric vibration. In use of Tes...
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Method of Undetermined Coefficients May 4th 2010, 06:30 PM ur5pointos2slo Method of Undetermined Coefficients Find yc(complimentary solution) and set up yp(particular solution) by the method of undetermined coefficients. y''+y'+(1/2)y = x*e^(-x/2)+x*cos(x/2) ok so yc = c1 e^(-x/2) cos(x/2) + c2 e^(...
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system of linear equations May 19th 2008, 06:16 PM #1 Newbie Joined May 2008 Posts 4 Solve the following systems of equations 4x + y -2z = 0 2x - 3y + 3z = 9 -6x - 2y + z = 0 Simplify the following expressions (6x^2 - 3x + 2) - (4x^2 + 2x - 5) Simplify the following to th...
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Energy in elliptic orbits Päällikkö How does one derive the total energy in an elliptic orbit: [tex]E= - \frac{GMm}{2a}[/tex] where a is the semi-major axis? I did manage to get the result for the special case of circular orbit, as [tex]v = \sqrt{\frac{GM}{R}}[/tex] But the problem is that I can't figure out a way to...
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Simple eqN of a line question July 30th 2006, 03:35 PM #1 Junior Member Joined Jul 2006 From New York, NY Posts 33 Simple eqN of a line question Hey, I have this question thats been bugging me for a few days now. $3y-15=2x-8$ Whats the answer if we put it in the eqN of a line? $2x...
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Need a function Hi, I need a function f(x) such that: f(1)=10 f(2)=8 f(3)=6 f(4)=4 f(5)=2 I think what you want is a continuous function: But the function $f(x) = 12-2x$ works If we assume that f is of the form $f(x)=ax+b$ then $a=\frac{f(x_1)-f(x_2)}{x_1-x_2} \equiv -2 ~ \forall x_1,x_2 \in \{1,2,3,4,5\} \implies a ...
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continuety of a complex function question.. What do you mean by complex function? I assme you mean that a difficult function...I assume this because the sign function is only defined on the reals. 1. $f(g(x))=1+\text{sign}(x)^2$ Note that $\ text{sign}(x)=\left\{\begin{array}{rcl} -1 & \mbox{if} & x<0 \\ 0 & \mbox{if} ...
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Symmetric convex curve up vote 3 down vote favorite a) Assume that $\gamma$ is a symmetric convex curve w.r.t. two orthogonal lines (such a curve is the ellipse). Is the following statement true. There exists a $(l,L)$-bi-Lipschitz mapping of the unit circle onto $\gamma$ such that $L=\mathbf{diam}(\gamma)/2$ and $l=\...
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the encyclopedic entry of change magnitude The centripetal force is the external force required to make a body follow a curved path. Hence centripetal force is a kinematic force requirement, not a particular kind of force, like gravity or electromagnetic force. Isaac Newton's description is found in the Principia. Many...
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Pascal's Rule July 6th 2010, 10:03 AM #1 Junior Member Joined Jun 2010 Posts 36 Pascal's Rule Hi this question was in Advanced Higher Maths in the UK Show that (n+1 , 3) - (n ,3 )=(n ,2) They are written in column vector form ie n+1 at top and 3 at the bottom for example for the first. I think yo...
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derivative So it is: $f(x)=\left( x^5 - \frac{4}{x} \right) ^{-4}$ It looks like your derivative of $x^5 - \frac{4}{x}$ was wrong. $\frac{d}{dx} \left( x^5 - \frac{4}{x}\right) = 5x^4 + \frac{4}{x^2}$ aww so i needed to use quotient rule on the 4/x That does work, but you can also do it by rewriting it first as $4x^{...
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[ 0.045654296875, 0.020751953125, 0.087890625, 0.08984375, -0.0196533203125, -0.1064453125, -0.040283203125, 0.000759124755859375, 0.0322265625, 0.043701171875, 0.0595703125, -0.03662109375, 0.00101470947265625, 0.052490234375, -0.052490234375, 0.080078125, 0.037109375, 0.00509643554...
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Pseudoprimes #2 Let p be prime, prove that if (2^p)-1 is a composite number, then m=(2^p)-1 is a pseudoprime. n = 2^p -1 == (denotes congruent) 2^(p-1) == 1modp by fermats little theorem since p is an odd prime. p|(2^(p-1)-1) so p|n-1 n = 2^p -1|2^(n-1) -1 2^(n-1) == 1mod n and 2^n == 2 mod n, so n is a pseudoprime
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[ 0.0255126953125, -0.002288818359375, 0.039306640625, 0.04833984375, 0.11474609375, -0.045654296875, 0.02978515625, 0.11572265625, -0.08447265625, 0.0005035400390625, -0.0654296875, -0.035888671875, 0.06005859375, 0.00909423828125, -0.0556640625, 0.010009765625, -0.02978515625, -0.0...
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What's inside the event horizon ClamShell I guess then that root(x^2 + y^2 + z^2) might be a metric? Almost. Metrics are differential, so that you can calculate distances over curves of any shape, not just straight lines. The metric for Euclidean space, then, is: [tex]ds = \sqrt{dx^2 + dy^2 + dz^2}[/tex] You calc...
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New Page 1 Chapter 27: Wave Optics: In this chapter wavelike behavior of light will be studied. There is a simple experiment that verifies light is a wave. The experiment is called the "Young's Double-slit experiment." Before this experiment is explained, we need to understand what constructive and destructive interf...
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Patente US5590044 - Method and apparatus for finding aircraft position by integrating accelerations less time averages The invention relates to a method for determining the position of an aircraft from acceleration data of an inertial system as well as from the output data of a navigation system, and to a device for ex...
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Chemistry: Activation Energy (Arrhenius equation) i just did this problem on my homework we have ln( k2/k1 ) = (Ea/R) * (1/T1 - 1/T2) where k is the reaction constant, Ea is activation energy, R is gas constant, T is temperature what are we solving for? well we want to see how k changes. we rearrange the equation: ...
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Simplify: Write Answer Only Using Positive Exponents (2x^-2 y^3/6xz^5)^-4 Answer is 81x^12 z^20/y^12 how is this so? Hello SSKFirst, invert the fraction to get rid of the negative power outside the bracket: $\left(\frac{2x^{-2} y^3}{6xz^5}\right)^{-4}=\left(\frac{6xz^5}{2x^{-2} y^3}\right)^{4}$ Then move the $x^ {-2}$...
4
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Circumference of an ellipse I have two integrals to give the circumference of an ellipse. I can't solve either. First, using rectangular coordinates, 1/2s=S{[1+(f'(x))^2]^(1/2)}dx taken from x=-a to x=a Since, y^2=b/a(a^2-x^2) 2y*y'=-2bx/a y'=-bx/(ay) [f'(x)]^2=(x^2)/(a^2-x^2) At this point, I'm already uncomfortable b...
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factorsing this expression March 5th 2010, 06:01 PM #1 Member Joined Jun 2009 Posts 108 factorsing this expression the expression is $6a^2-a-2$ now this is what ive done....... taken out the common factor of -ve. 1. $-(6a^2+a+2)$ 2. $-[(6a^2+a+12)]$ 3. $-[(6a^2+4a-3a+12)]$ 4....
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Inequality February 20th 2008, 08:21 AM #1 Senior Member Joined Nov 2007 Posts 329 Inequality Prove that if $ab + ac + bc = 3$: $8(a + b + c)^2\geq9(a + b)(a + c)(b + c)$ ( $a,b,c\ge 0$) The question says $a,b,c\ge 0$.. Suppose one of $a,b,c$ is 0. Then the other two can’t be 0 if the...
5
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GMAT Algebra (Data Sufficiency) • GMAT Prep (USA) • • GMAT Prep (International) • • Favorite GMAT Articles □ 800score GMAT Course Reviews □ GMAT Course Comparision □ GMAT Essay Tips & Grading from 800score • • Free GMAT Prep □ Free GMAT ...
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Factorising August 14th 2008, 09:13 AM #1 Member Joined Aug 2008 Posts 179 Hi! I am having trouble factorising these: 6xsquared - 11x - 35 6xsquared - 37x + 45 Can someone please show me worked examples to these. And sorry, I don't know how to use latex but I will learn it soon to make math...
4
[ -0.007354736328125, -0.04150390625, 0.045654296875, -0.00396728515625, 0.04150390625, 0.080078125, 0.01904296875, -0.0179443359375, -0.12255859375, 0.0211181640625, 0.050537109375, 0.032470703125, 0.0966796875, 0.02001953125, -0.0234375, 0.050048828125, 0.00970458984375, 0.05102539...
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More rational numbers! Yay! April 8th 2007, 05:35 PM #1 alrighty. so here we got... This.. and me and my dad cant figure out how they get the middle number at all!~ Hello, Cait and Dad! . . . . . . . . . . . . . x + 8 . . . . . x + 1 . . . . . . . . x + 8 . . . . . . . .x + 1 We are gi...
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[ -0.029296875, 0.04931640625, 0.0576171875, -0.049072265625, 0.0269775390625, 0.053466796875, 0.057373046875, 0.01092529296875, 0.0072021484375, -0.0010223388671875, 0.0003604888916015625, -0.016845703125, 0.07470703125, 0.00421142578125, -0.0703125, -0.00019073486328125, -0.074707031...
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Exponential problem June 21st 2010, 03:36 AM #1 Newbie Joined Jun 2010 Posts 6 Exponential problem A exponential curve relating two quantities 'q' and 't' has the form q=ae^kt where a and k are constants. The curve passes through two points (0.09036,2) and (3.307,-4) Determine the values of 'a' a...
4
[ -0.0233154296875, 0.0986328125, -0.01220703125, -0.0208740234375, -0.07958984375, 0.0123291015625, 0.0361328125, 0.005889892578125, 0.109375, 0.07958984375, 0.1240234375, -0.1298828125, 0.0419921875, 0.0849609375, 0.06396484375, 0.01214599609375, -0.126953125, -0.021240234375, -0...
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Decay rates June 3rd 2008, 09:33 AM Prod!gy Decay rates I'm having second thoughts on the answers I came up with... Einsteinium-235 decays at a rate of 3.406% per day. a. find the annual decay rate in exact form: 100(.96594)^365 b. Compute an approximation of your solution in part a accurate t...
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Characteristic Function on A November 15th 2011, 06:26 PM #1 Member Joined Sep 2010 Posts 151 Thanks 1 Characteristic Function on A Consider the function f(x)=2-3x with domain R ( real numbers). Let A = [-1,3), B=(2,5]. a.)Sketch the graph of XA•XB (which has X with an A subscript and X wit...
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[ -0.064453125, -0.0279541015625, -0.0322265625, -0.11962890625, -0.0213623046875, 0.006591796875, 0.0419921875, -0.002716064453125, -0.0673828125, 0.04931640625, 0.0517578125, -0.0693359375, 0.0654296875, 0.0693359375, 0.138671875, 0.08984375, -0.037841796875, -0.095703125, -0.048...
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Related rates and implicit April 11th 2009, 07:43 AM #1 Newbie Joined Apr 2009 Posts 1 Related rates and implicit hi i had two questions first one A spherical balloon is being filled with helium at a rate of 8cm^3/s at what rate is the radius increasing when the radius is 12cm, when the volume is 14...
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[ 0.004913330078125, 0.0029296875, -0.003997802734375, -0.0031280517578125, -0.0023193359375, 0.01275634765625, 0.0142822265625, 0.017578125, -0.001251220703125, 0.0120849609375, 0.05712890625, 0.042724609375, -0.024169921875, 0.0830078125, 0.0255126953125, 0.0169677734375, -0.01757812...
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Series error approximation calc 2 - few questions November 8th 2009, 10:29 AM #1 Newbie Joined Nov 2009 Posts 4 Series error approximation calc 2 - few questions Intergal (arctan(x^2),x,0,3/4) aproximate the value using Rn <= 0.001 I totally can do this.. if it didn't have an intergal... I know arct...
4
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Help me understand and remember this Theorem January 8th 2011, 07:59 AM #1 Junior Member Joined Oct 2010 Posts 56 I am really struggling with a theorem in my book (Tao; Analysis II). I don't think I can properly remember this theorem because it contains so much, plus I dont think I really get the Theo...
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Optimization November 11th 2007, 08:31 AM #1 Junior Member Joined Sep 2007 Posts 48 Optimization One hallway which is 4 feet wide meets another hallway which is 8 feet wide in a right angle (see picture). What is the length of the longest ladder which can be carried horizontally around the corner? (H...
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[ -0.0103759765625, 0.078125, -0.05078125, -0.038330078125, -0.07177734375, -0.005645751953125, -0.07666015625, 0.0272216796875, -0.03369140625, 0.068359375, -0.0208740234375, -0.0218505859375, 0.046630859375, 0.0751953125, 0.0615234375, 0.1318359375, -0.0198974609375, 0.027465820312...
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Trig Problem November 24th 2009, 04:17 PM #1 Newbie Joined Oct 2009 Posts 5 Trig Problem Looking for someone to verify my work .... If $\sin\theta=\frac{1}{3}$ and $\frac{\pi}{2}<\theta<\pi$ then what is $\cos\theta?$ Solution $\sin^2\theta+\cos^2\theta=1$ $\frac{1}{3}^2+\cos^2\theta=...
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Math Help March 26th 2008, 11:16 AM #1 Super Member Joined Mar 2006 Posts 705 Thanks 2 Module 77 Evalute $2^{100000}$ in mod 77. I know that $2^{76} \equiv 1 \ (mod \ 77)$, but how should I continue? Thanks. Sorry, but I'm getting $2^{76} \equiv 9 \text{ (mod 77)}$. There may be a mor...
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Patent US5960375 - Transmitter with improved compensation This application is a Divisional of prior application Ser. No. 08/186,288, filed Jan. 25, 1994, entitled "TRANSMITTER WITH IMPROVED COMPENSATION," now U.S. Pat. No. 5,642,301 issued Jun. 24, 1997 to Warrior et al. Reference is hereby made to co-pending patent ap...
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Derivatives of natual logs $\frac{d}{dx} \ln(f(x)) = \frac{1}{f(x)} \times \frac{d}{dx} (f(x))$ Hence: $\frac{d}{dx} \ln(x\sqrt{x^2-1}) = \frac{1}{x\sqrt{x^2-1}} \times \frac{d}{dx} (x\sqrt{x^2-1})$ $= \frac{1}{x\sqrt{x^2-1}} \times \frac{d}{dx} (\sqrt{x^4-x^2})$ $= \frac{1}{x\sqrt{x^2-1}} \times \frac{d}{dx} ({x^4-x^2...
5
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A true or false about an inner product March 2nd 2009, 09:11 AM arbolis A true or false about an inner product Hi MHF, I did badly (failed) in the final exam on linear algebra (4.4/10) and so I must retake the exam in late June or early July. I'm still stuck on some exam questions : Tell whether this is ...
5
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Differentiation problem Quote: Originally Posted by xpi0t0s > Now, when you differentiate f(x) : [[ D(h(x)) = Derivative of h(x) w.r.t. x ]] > you do it like f'(x) = D(x) + D(x) + ..(x times).. + D(x) which is invalid. Why is it invalid? According to http://mathworld.wolfram.com/Derivative.h...
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Boolean algebra / venn diagrams October 23rd 2009, 12:12 AM #1 Member Joined Sep 2008 Posts 239 Boolean algebra / venn diagrams For any two subsets A and B of some set S, $(A \cup B) - (A \cap B) = (A - B) \cup (B - A)$ where $X-Y = X \cap Y'$ Show that this is true by using a) Venn diagra...
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MathGroup Archive: May 2009 [00287] [Date Index] [Thread Index] [Author Index] Re: derivative of a well-behaved function • To: mathgroup at smc.vnet.net • Subject: [mg99529] Re: [mg99466] derivative of a well-behaved function • From: ...
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planes, lines and points type of question. August 14th 2006, 11:18 PM #1 Junior Member Joined Feb 2006 From Victoria, Australia Posts 36 planes, lines and points type of question. I need help with this, do i use gaussian elimination or something else. Three planes have eqn's given by: x+3y-...
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Measuring the distance of a convex set from a ball (Nikodym distance) up vote 2 down vote favorite Assume we have a centrally symmetric convex set $K \subset \mathbb{R}^n$ such that Vol(K)=1. In addition, assume that for every direction $u$ we know that $Vol(K \Delta R_u(K)) < \epsilon$, where $A \Delta B$ is the symm...
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The Maximal Subspace for Generation of Abstract and Applied Analysis Volume 2012 (2012), Article ID 683021, 14 pages http://dx.doi.org/10.1155/2012/683021 Research Article The Maximal Subspace for Generation of -Regularized Families ^1Facultad de Ciencias Básicas, Universidad Tecnológica de Bolívar, Cartagena, Colo...
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[ -0.04150390625, 0.009765625, 0.0223388671875, 0.009033203125, 0.015380859375, 0.0703125, 0.0247802734375, -0.05224609375, -0.0245361328125, -0.01953125, 0.0223388671875, 0.0283203125, 0.0164794921875, -0.05126953125, -0.047607421875, 0.0263671875, -0.00089263916015625, -0.004791259...
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Some Fuzzy-Wavelet-Like Operators and Their Convergence Mathematical Problems in Engineering Volume 2013 (2013), Article ID 832831, 10 pages http://dx.doi.org/10.1155/2013/832831 Research Article Some Fuzzy-Wavelet-Like Operators and Their Convergence Department of Mathematics, Karaj Branch, Islamic Azad University,...
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Nonlinear Effects of Electromagnetic TM Wave Propagation in Anisotropic Layer with Kerr Nonlinearity Advances in Mathematical Physics Volume 2012 (2012), Article ID 609765, 21 pages http://dx.doi.org/10.1155/2012/609765 Research Article Nonlinear Effects of Electromagnetic TM Wave Propagation in Anisotropic Layer wit...
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[ -0.0732421875, 0.0242919921875, 0.06982421875, 0.033447265625, -0.0157470703125, -0.037841796875, -0.0126953125, -0.049072265625, -0.0223388671875, 0.00567626953125, 0.10595703125, 0.050048828125, -0.00823974609375, -0.0115966796875, 0.0084228515625, 0.036865234375, -0.00222778320312...
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Help on continuity December 16th 2006, 03:51 AM #1 Senior Member Joined Jul 2006 From Shabu City Posts 381 Help on continuity Determine the number at which the function is discontinuous, and show why definition 1.8.1 isnt satisfied at this number Def 1.8.1 1.) $f(a)$ exists 2.) $\lim_{x \...
4
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Euclidean algorithm gcd lcm help.. August 10th 2006, 04:50 AM kodirl Euclidean algorithm gcd lcm help.. Use the euclidean algorithm to find the gcd of 2232 and 3828 and find the lcm of 2232 and 3828. I'm not expecting an answer maybe just a quick and easy example of how to solve the sum quickly..thanks Aug...
4
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Summation proof I have conjectured that $\sum^{n}_{i=m}i = \sum^{n}_{i=m}( n+m-i).$ How would one go about constructing a proof for this? Cheers. Split the right hand side into $\sum^{n}_{i=m}(n+m)- \sum^{n}_{i=m}(i)$ And note that $\sum^{n}_{i=m}(i)= \sum^{n}_{i=1}(i)-\sum^{m}_{i=1}(i)$ You should know how to sum int...
4
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[SOLVED] Integration by Substitution February 11th 2009, 01:03 PM #1 Newbie Joined Feb 2009 Posts 10 [SOLVED] Integration by Substitution I am trying to integrate the equation sin (x) * cos(cos (x)), I assume it is best done through integration by U-substitution but I cannot seem to come up with the U. A...
4
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equation of tangent October 11th 2010, 04:37 AM #1 Member Joined Oct 2009 Posts 202 equation of tangent The normal to the curve $y=x^2 - 6x + 1$ at the point $p$ is parallel to the straight line.Find the equation of the $2y = x + 3$ tangent to the curve at the point $p$ If this is how your post shou...
4
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Simplifying product of to sum of in likelihood equation December 1st 2009, 11:06 AM #1 Newbie Joined Nov 2009 Posts 13 Hi, I'm having problems with the veru bsics so I cant get any further on my questions. When given a function f(xlt). to find the likelihood you have to do the product of it. I dont unders...
4
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Sufficient Efficiency Conditions for Vector Ratio Problem on the Second-Order Jet Bundle Abstract and Applied Analysis Volume 2012 (2012), Article ID 713765, 9 pages http://dx.doi.org/10.1155/2012/713765 Research Article Sufficient Efficiency Conditions for Vector Ratio Problem on the Second-Order Jet Bundle Faculty...
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Patent US7899652 - Linear programming support vector regression with wavelet kernel FIELD OF THE INVENTION The present invention relates to nonlinear dynamical systems identification and modeling, in particular using linear programming support vector regression (LP-SVR) with wavelet kernel. BACKGROUND OF THE INVENTIO...
4
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quick solution required for DE of TanX*TanY=C? i am very much thankful to the one who show quick solution for DE of TanX*TanY=C? If I undestand correctly You require the DE the solution of which is, in implicit form,... $\tan x\cdot \tan\ y = c$ (1) In that case we first separe the variables... $\tan y= c\cdot \cot x$...
5
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general soltn by using mthd of characteristic May 7th 2010, 12:55 AM #1 Newbie Joined Dec 2008 Posts 18 u_xx + 10u_xy + 9u_yy = y how can we find this equation's general solution by using the method of characteristics? ı m new in this field. First we will determine the type. Then general form of...
5
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Exact Equation September 11th 2010, 09:49 PM #1 Exact Equation $(e^x \sin{y} -3x^2) \,dx +(e^x \cos{y} + \frac{y^{-2/3}}{3}) \, dy = 0$ $(e^x \sin{y} -3x^2) +(e^x \cos{y} + \frac{y^{-2/3}}{3}) \frac{dy}{dx} = 0<br />$ $M = e^x \sin{y} -3x^2 \,, N = e^x \cos{y} + \frac{y^{-2/3}}{3}$ $\frac{\partial ...
5
[ -0.05517578125, 0.014404296875, -0.059814453125, 0.04345703125, -0.007049560546875, 0.0213623046875, -0.0162353515625, -0.00049591064453125, -0.0380859375, -0.039794921875, 0.087890625, -0.07421875, -0.0028076171875, -0.07666015625, 0.10400390625, -0.045654296875, -0.0194091796875, ...
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Area of a rose petal using Green's Theorem February 22nd 2010, 09:02 PM #1 Member Joined Nov 2008 Posts 76 Area of a rose petal using Green's Theorem Use Green's theorem to compute the area of one petal of the 16-leafed rose defined by r = 13sin(8t). It may be useful for recall that the area of a re...
4
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Patent US6381624 - Faster multiply/accumulator BACKGROUND OF THE INVENTION A multiply/accumulator (MAC) is a circuit that accepts three numerical input values A,B and C, and produces therefrom the arithmetic result A*B±C. Often, A, B and C are signed floating point 5 binary numbers expressed in the format described by...
4
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Linear combinations of random variable November 7th 2006, 04:09 PM #1 Junior Member Joined May 2006 Posts 37 Linear combinations of random variable I have no idea what I did wrong, please help! Small packets of nails are advertised as having average weight 500 g, and large packets as having average ...
5
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Calc 2 : Integrals February 18th 2009, 11:09 AM #1 Calc 2 : Integrals Hey, It's most likely my poor Algebra, but I'm having an issue with this problem: Solve the integral: $\int{\frac{x-1}{x^2-4x+5}}dx$ $\int{\frac{x-1}{x^2-4x+5}}dx \Longrightarrow \int{\frac{x-1}{(x-2)^2+(3)^2}}dx$ $\Longright...
5
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maximum value Given that 2u+3v+4x is equal to 12. Then find the maximum value of u^2×v^3×x^5. Hey geniusgarvil. If you perform a trinomial expansion on your 2u+4x+4x, you will be able to get a term in regards to u^2*v^3*x^5 if you raise it to the power of (2+3+5) = 10. If you assume that the highest term contains all ...
5
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[SOLVED] Exponential Functions April 20th 2009, 01:20 AM #1 Junior Member Joined Jan 2009 Posts 74 I need help with 2 problems, please. I'm not sure how to solve them. #1: $<br /> 4x^{2}(2^{x}) - 9(2^{x}) = 0<br />$ #2: $<br /> \frac{(x+4)10^{x}}{x-3} = 2x(10^{x})<br />$ Thanks for ...
4
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need help.. related rates November 5th 2006, 10:51 AM #1 Member Joined Sep 2005 Posts 136 need help.. related rates A small boy standing in a flat field watches a balloon ise at a distance.The ballon leaves the ground 500m away from the boy and rises vertically at a rate of 14m/ minute.At what rate is th...
5
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T TRIGONOMETRY © Department of Physics, University of Guelph C is a right angle and the angle at A we will call θ. The lengths of the sides of the triangle we will denote as p, q and r. From your elementary geometry, you know several things about this Panel triangle. For example, you know ...
4
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Vectors - help needed Last edited by wiseguy; August 6th 2010 at 10:29 AM. a) You will need vector addition, which is just adding vectors componentwise. b) Use the law of cosines c) Use the formula $\frac{1}{2}|\vec{a} \times \vec{b}|$ where $\times$ is the cross-product and $|\qquad|$ is the magnitude. d) Use the for...
5
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Mapping Iterative Medical Imaging Algorithm on Cell Accelerator International Journal of Biomedical Imaging Volume 2011 (2011), Article ID 843924, 11 pages http://dx.doi.org/10.1155/2011/843924 Research Article Mapping Iterative Medical Imaging Algorithm on Cell Accelerator Department of Computer Science, University...
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Help with basic Geometry proof September 12th 2009, 05:55 PM #1 Newbie Joined Sep 2009 Posts 2 Help with basic Geometry proof I've been having a bit of trouble with geometry proofs. I'm really trying to learn and figure this one out myself, but I could use a little guidance. I'm not sure if I'm missing s...
4
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Cramer's Rule Computation Help March 27th 2012, 10:12 AM renolovexoxo Cramer's Rule Computation Help Let D(x,y) denote the determinant of the 2x2 matrix with rows x and y. Assume the vectors v1,v2, v3 in R2 are pairwise linearly independent. Prove that D(v2, v3)v1 + D(v3, v1) v2 + D(v1, v2)v3=0. (Hint: write...
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Inverse of a 3 by 3 matrix September 13th 2009, 01:00 PM #1 Junior Member Joined Sep 2009 Posts 61 Inverse of a 3 by 3 matrix i am having trouble with this problem. its been almost an hour and i still only get part of the answer. i dont know what i am doing wrong. the question is find the inverse of...
5
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Patent US5859912 - Digital information privacy system BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic communication of messages, and more particularly, to security of these messages. 2. Description of Related Art Systems for creating random number have been used in ...
4
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box item problem May 16th 2010, 10:37 PM #1 Member Joined Apr 2010 From dfsdfdf Posts 160 Dear Sir, I need help some help with the below problem and would appreciate very much if can offer some help. thanks Kingman John has 5 items, one each to be named P,Q, R,S and T. Each item is pl...
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Compute Perimeter & Area October 23rd 2006, 06:22 AM TreeMoney Compute Perimeter & Area Consider the region in the plane enclosed by y = x^2 and y = 4. a) Compute it's perimeter P and area A, and the ratio Q = A / P^2. (By squaring the perimeter we make this ratio independent of the unit length chosen to mea...
5
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Solving triangle ABC using given measurements May 4th 2008, 11:25 AM emmahlav Solving triangle ABC using given measurements I was not paying attention in class when this was taught and now I'm completely lost right triangle ABC B=40 degrees side a=14 what do I do next? May 4th 2008, 11:29 AM ...
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Series solution, second order diff. eq. Hi there. I have this differential equation: [tex]x^4y''+2x^3y'-y=0[/tex] And I have to find one solution of the form: [tex]\sum_0^{\infty}a_nx^{-n},x>0[/tex] So I have: [tex]y(x)=\sum_0^{\infty}a_n x^{-n}[/tex] [tex]y'(x)=\sum_1^{\infty}(-n) a_n x^{-n-1}[/tex] [tex]y''(x)=\...
5
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Math Help November 12th 2008, 04:38 AM #1 Tests I've done these questions but I would like them to be checked. Let $w=e^{\frac{2i\pi}{3}}$. Then $iw$ is an n-th root of unity where n is: a). 12 b). 7 c). 4 d). 3 My answer is c). Suppose that u, v and w are unit vectors in $\Re ^...
5
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Lorentz force law equation Use magnetic lorentz force on a charged particle equation. And you can prove F=BqvsinΘ.(Magnitude only). so B= F/qvsinΘ So, the unit of B is N/C(ms^(-1)) multiply s on both numerator and denominator, so the unit is Ns/Cm But F = BILsinΘ (Force on current carrying wire) Unit of RHS is th...
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Outer product on operators? First of all, I think that the formula should be J = L[itex]\otimes[/itex]1 + 1[itex]\otimes[/itex]S . About it's meaning, when you have two operators (say A and B) which operate on two, in general different, Hilbert spaces (say H[A] and H[B]), then you can create a new Hilbert space by the ...
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Algorithms Explained 0 Tags: encryption server advanced Encryption has become a part and parcel of our lives and we have accepted the fact that data is going to encrypted and decrypted at various stages. However, there is not a single encryption algorithm followed everywhere. There are a number of algorithms existin...
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Learn about Senior Chemistry: Energetics 9 Male Speaker: Okay, so its not the most exciting lab to do in the world but you know it has one of the most important and impressive types of calculations to be able to do and here is the thing about the ice cube lab that's pretty much standard lab that we do everywhere as che...
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