content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Spectral Approach to Derive the Representation Formulae for Solutions of the Wave Equation
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 761248, 19 pages
http://dx.doi.org/10.1155/2012/761248
Research Article
Spectral Approach to Derive the Representation Formulae for Solutions of the Wave Equation
D... | 5 | [
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Math Forum: Teacher2Teacher - Q&A #4246
Teacher2Teacher Q&A #4246
Saxon Algebra 1 (volume or prisms)
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Show that ||x||= d(x,0) defines a norm on V
October 21st 2011, 01:26 PM
wopashui
Show that ||x||= d(x,0) defines a norm on V
Let V be a vector space, and let d be a metric on V satisfying $d(x,y) = d(x-y,0)$and $d(ax,ay) = |a|d(x,y)$for every $x,y \in V$ and every scalar a. Show that $||x||=d(x,0)$ defines a nor... | 4 | [
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Distribution Network Design for Fixed Lifetime Perishable Products: A Model and Solution Approach
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 891409, 13 pages
http://dx.doi.org/10.1155/2013/891409
Research Article
Distribution Network Design for Fixed Lifetime Perishable Products: A Model and Soluti... | 4 | [
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Stability Analysis of Learning Algorithms for Ontology Similarity Computation
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 174802, 9 pages
http://dx.doi.org/10.1155/2013/174802
Research Article
Stability Analysis of Learning Algorithms for Ontology Similarity Computation
^1School of Information and T... | 4 | [
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Binary Classification – A Comparison of “Titanic” Proportions Between Logistic Regression, Random Forests, and Conditional Trees
December 23, 2012
By inkhorn82
Now that I’m on my winter break, I’ve been taking a little bit of time to read up on some modelling techniques that I’ve never used before. Two such techniqu... | 5 | [
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The Monads Hidden Behind Every Zipper
Uustalu
points out that behind every zipper lies a comonad. I used this in my
cellular automaton example
. What he doesn't mention is that there is also a monad lurking behind every zipper and that it arises in a natural way. The catch is that it's a monad in the wrong category ... | 5 | [
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The Linear Span of Projections in AH Algebras and for Inclusions of
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 204319, 12 pages
http://dx.doi.org/10.1155/2013/204319
Research Article
The Linear Span of Projections in AH Algebras and for Inclusions of -Algebras
^1Center of Research and Development,... | 4 | [
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maxima, minima, saddle point problem
September 4th 2008, 09:02 PM
Dr Zoidburg
maxima, minima, saddle point problem
Find and classify all local maxima, minima and saddle points for the surface:
$<br /> f(x,y)=x^3+y^3-3x-3y<br />$
last question for my assignment
thanks!
September 4th 2008, 09:27 PM
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Numerical Methods: Numerical Differentiation
February 25th 2009, 02:20 AM
zeugma
Numerical Methods: Numerical Differentiation
Hi everyone. I have a homework on numerical differentiation and I just want to know if my answers are correct.
1.) The partial derivative, $f_x(x,y)$ of $f(x,y)$ with respect to x is... | 5 | [
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to prove that the sequence is unbounded.
QUESTION: show that the sequence http://latex.codecogs.com/png.latex?(x_n) defined recursively as http://latex.codecogs.com/png.latex?... \, unbounded. MY SOLUTION: Let the sequence be bounded above.
It then has a least upper bound say http://latex.codecogs.com/png.latex?L. now,... | 5 | [
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Under-Actuated Robot Manipulator Positioning Control Using Artificial Neural Network Inversion Technique
Advances in Artificial Intelligence
Volume 2012 (2012), Article ID 927905, 6 pages
http://dx.doi.org/10.1155/2012/927905
Research Article
Under-Actuated Robot Manipulator Positioning Control Using Artificial Neura... | 4 | [
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Just cant seem to make it pass these math questions
November 18th 2006, 08:21 PM #1
jamascott
Guest
Just cant seem to make it pass these math questions
1. A basement hols 18in of water. Water is being pumped ot at 1 1/2 inches every 50 minutes. How many hours will it take to pump out all of the water?
2. 3 k... | 4 | [
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Performance of Dual-Axis Solar Tracker versus Static Solar System by Segmented Clearness Index in Malaysia
International Journal of Photoenergy
Volume 2013 (2013), Article ID 820714, 13 pages
http://dx.doi.org/10.1155/2013/820714
Research Article
Performance of Dual-Axis Solar Tracker versus Static Solar System by Se... | 4 | [
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Integration problem
October 18th 2010, 07:38 AM #1
Let, Yn= integration of {e^(-nt)}/t , from 0 to 1, where n is a natural number. what can be said about the sequence {Yn}?
Pleaze help me for this problem. at least hep me finding the integration part.
Last edited by mr fantastic; October 18th 2010 at 04:... | 5 | [
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PhysicsLAB: Inertial Mass
Lab
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Help with calculus question in economics
November 6th 2011, 12:02 PM #1
Newbie
Joined
Nov 2011
Posts
2
Help with calculus question in economics
Hi guys... Not sure if this is the right forum to post my question in but i'll give it a go anyways.
Here's the question:
Total Revenue is price times qu... | 5 | [
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A question about step functions
January 22nd 2010, 08:51 AM #1
Junior Member
Joined
Mar 2009
Posts
34
A question about step functions
I am really stuck on the following, I don't know how to start. Can somebody please help?
Suppose f:[a,b]->R is a weakly increasing function, i.e. u<v gives f(u)<=f(v)... | 5 | [
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Physics Kinematics Equation Must Be Solved W/ Algebra
August 9th 2010, 06:53 PM #1
Newbie
Joined
Aug 2010
Posts
1
Physics Kinematics Equation Must Be Solved W/ Algebra
So I have the formula and values substituted in correctly - but now the simple algebra part is killing me.
x = vt + 1/2at^2
.06=(... | 4 | [
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Research on Optimal Sensor Placement Based on Reverberation Matrix for Structural Health Monitoring
International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 454530, 7 pages
http://dx.doi.org/10.1155/2012/454530
Research Article
Research on Optimal Sensor Placement Based on Reverberation Mat... | 4 | [
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0.02478027343... | 28,719 | 28719 | |
Group velocity of a wave
July 4th 2011, 09:57 AM #1
Newbie
Joined
Oct 2008
Posts
24
Group velocity of a wave
The phase velocity for waves in a determined material is given by: v= $v=C_1 + C_2 \lambda$
Both Cs are constants. $\lambda$ is wavelength. Determine the group velocity $v_g$!
My calcula... | 5 | [
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0.0076... | 28,720 | 28720 | |
A certain business printer can print 40 characters per
Author Message
TAGS:
A certain business printer can print 40 characters per [#permalink] 16 Mar 2007, 14:25
... | 4 | [
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The Existence of Positive Solutions for Fractional Differential Equations with Sign Changing Nonlinearities
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 180672, 13 pages
http://dx.doi.org/10.1155/2012/180672
Research Article
The Existence of Positive Solutions for Fractional Differential Equations wit... | 5 | [
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App. Diff. Geom.: Df(u) <=> f'(x_0)??
July 9th 2010, 04:06 AM #1
Newbie
Joined
Jul 2010
From
nyc
Posts
12
App. Diff. Geom.: Df(u) <=> f'(x_0)??
On p. 22 of "Applied Differential Geometry" by William Burke he says that Df(u) must be the unique linear operator satisfying
$\lim_{h\rightarrow0}\fra... | 4 | [
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Directional derivative
March 14th 2009, 10:16 AM
Chris0724
Directional derivative
Given
F( x, y ,z) = 2x + 3y^2 + yz,
find Directional derivative of F at ( 2 , -1, 5) along the direction given by line x = y = ( z / 2).
-----------------------------------------------------------------------
Dir... | 4 | [
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... | 28,724 | 28724 | |
Left/right hand limits.
October 4th 2010, 05:59 PM #1
Junior Member
Joined
Sep 2010
Posts
59
Left/right hand limits.
For this one, I already know that csc(x) is 1/sin(x) since csc is the inverse of sin. The limit of csc(x) or 1/sin(x) as theta approaches 0 from the right hand side is infinity. Addin... | 5 | [
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Cramer's Rule and Determinants
October 29th 2007, 10:52 AM #1
Junior Member
Joined
Sep 2007
Posts
29
Cramer's Rule and Determinants
I am to solve the following using Cramer's rule:
-x1 - 4x2 + 2x3 + x4 = -32
2x1 - x2 + 7x3 + 9x4 = 14
-x1 + x2 + 3x3 + x4 = 11
x1 - 2x2 + x3 - 4x4 = -4
... | 5 | [
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Complex Integral
May 3rd 2010, 03:17 PM #1
Junior Member
Joined
Apr 2010
Posts
26
Complex Integral
Explaining your method compute..
$J=\int_{-\infty }^{\infty }\frac{x^{2}dx}{1+x^{6}}$
Is it right to say that we use a contour consisting of the real interval [-R,R].
and to write the integra... | 5 | [
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Understanding A Function using its derivative?
May 7th 2011, 09:28 PM #1
Junior Member
Joined
Apr 2011
Posts
68
Understanding A Function using its derivative?
Hey guys. Can you please help me with this.
A test question states that f'(x) $\leqslant$5 for all values of x, and that f(0) = -3. What is t... | 4 | [
-0.00732421875,
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0.09375,
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-0... | 28,728 | 28728 | |
Math Help
November 10th 2008, 02:27 PM #1
Member
Joined
Sep 2008
Posts
166
p-groups
Let G be a finite group and p be a prime. Prove that G is a p-group if and only if the order of each element of G is a power of p.
I assume by "p-group" you mean |G| is a power of a prime.
If G is a p-group and... | 5 | [
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0.001823... | 28,729 | 28729 | |
Transforming a 2nd order PDE into canonical form
March 3rd 2012, 11:28 PM #1
Dear MHF members,
first of all glad to see the form back again.
I have the following problem $yz_{xx}+z_{yy}=0$.
When I check the discriminant, I see that $\Delta=0^2-4y=-4y$.
Hence, the following cases occur.
(a) For... | 5 | [
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How to Understand Logarithms
Know and apply the properties of logarithms.
The properties of logarithms allow you to solve logarithmic and exponential equations that would be otherwise impossible. These only work if the base
a
and the argument are positive. Also the base
a
cannot be 1 or 0. The properties of logari... | 4 | [
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... | 28,731 | 28731 | |
series expansion of the cosine integral
December 21st 2011, 12:25 PM
Random Variable
series expansion of the cosine integral
$\text{Ci} (x) = -\int_{x}^{\infty} \frac{\cos t}{t} \ dt$
$= -\int_{x}^{\infty} \frac{1}{t} \sum_{n=0}^{\infty} \frac{(-1)^{n}}{(2n!)} \ t^{2n} \ dt$
$= -\sum_{n=0}^{\infty} \fr... | 5 | [
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... | 28,732 | 28732 | |
the encyclopedic entry of mathematical model
Note: The term model has a different meaning in model theory, a branch of mathematical logic. An artifact which is used to illustrate a mathematical idea is also called a mathematical model and
this usage is the reverse of the sense explained below.
A mathematical m... | 4 | [
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Monotonicity Preserving Rational Quadratic Fractal Interpolation Functions
Advances in Numerical Analysis
Volume 2014 (2014), Article ID 504825, 17 pages
http://dx.doi.org/10.1155/2014/504825
Research Article
Monotonicity Preserving Rational Quadratic Fractal Interpolation Functions
Department of Mathematics, Indian... | 4 | [
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-0.0... | 28,734 | 28734 | |
Hybrid Extragradient Method with Regularization for Convex Minimization, Generalized Mixed Equilibrium, Variational Inequality and Fixed Point Problems
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 436069, 27 pages
http://dx.doi.org/10.1155/2014/436069
Research Article
Hybrid Extragradient Method with ... | 4 | [
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Finding a point position on a shape after the shape was rotated
August 15th 2011, 02:17 PM
Minikloon
Finding a point position on a shape after the shape was rotated
Hi. First I'd like to let you know that I'm probably in the wrong section, but this is because I really, honestly, don't know where to put this ques... | 4 | [
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-0.... | 28,736 | 28736 | |
Show that rational numbers correspond to decimals
February 10th 2011, 06:58 AM #1
Junior Member
Joined
Apr 2010
Posts
58
Show that rational numbers correspond to decimals
Show that rational numbers correspond to decimals which are either repeating or terminating.
Hint: If q = m|n, then when dividing... | 4 | [
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Characterisation of Structure-Borne Sound Source Using Reception Plate Method
The Scientific World Journal
Volume 2013 (2013), Article ID 742853, 9 pages
http://dx.doi.org/10.1155/2013/742853
Research Article
Characterisation of Structure-Borne Sound Source Using Reception Plate Method
Sustainable Maintenance Engine... | 4 | [
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0... | 28,738 | 28738 | |
S Combinator is Injective, with Proofs
By chance, I came upon a blog entry by Masahiro Sakai (酒井政裕) in which he, after reading my short comment on my previous homepage “Do you know that the S combinator is injective? I have a simple
algebraic proof!”, tried to construct the inverse of S and showed that S⁻¹ ○ S = id in... | 5 | [
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Tuning Genetic Algorithm Parameters to Improve Convergence Time
International Journal of Chemical Engineering
Volume 2011 (2011), Article ID 646917, 7 pages
http://dx.doi.org/10.1155/2011/646917
Research Article
Tuning Genetic Algorithm Parameters to Improve Convergence Time
Institute of Biophysics and Biomedical En... | 4 | [
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The Existence of Solutions for Impulsive Fractional Partial Neutral Differential Equations
Journal of Mathematics
Volume 2013 (2013), Article ID 147193, 9 pages
http://dx.doi.org/10.1155/2013/147193
Research Article
The Existence of Solutions for Impulsive Fractional Partial Neutral Differential Equations
^1Departme... | 5 | [
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... | 28,741 | 28741 | |
Integration Challenge
Prove the integral of 1/(x^3+8) between the x terminals 4 and 1 equals (pie root 3)/36
nath_quam You can express, $\frac{1}{x^3+8}$ As, $\frac{1}{(x+2)(x^2-2x+4)}$ Then decompose this fraction as, $\frac{A}{x+2}+\frac{Bx+C}{x^2-2x+4}$ When fully decomposed gives, $<br /> \frac{2}{3}\
cdot \int^4_... | 5 | [
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0.0203857... | 28,742 | 28742 | |
Impossible Interest question.
January 25th 2013, 01:00 AM #1
Junior Member
Joined
Sep 2012
From
canada
Posts
45
Impossible Interest question.
At the end of each quarter year, aaron makes a 625 payment into a mutual fund that earns an annual percentage rate of 6%, compounded quarterly. The future valu... | 5 | [
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-0.10693359375... | 28,743 | 28743 | |
Math Help
May 1st 2010, 08:13 AM #1
Senior Member
Joined
Apr 2009
Posts
306
Dice
Hi, I am currently stuck on this extended response question from my book, I really don't know how to do the parts of the questions, could anyone help me? Thanks
You are given two un-biased dice, one painted red and one... | 4 | [
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Mandelbrot Set
Mandelbrot Set code
The C programs shown use Allegro for graphics output. Since the only graphical function required is putpixel, it should be trivial to modify the code for other graphics libraries. Qbasic no long... | 4 | [
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Why is a group of order 3 abelian?
March 1st 2007, 04:34 PM #1
Newbie
Joined
Nov 2006
Posts
18
Why is a group of order 3 abelian?
I have some modern algebra homework due tomorrow (and a midterm in there, ) and I've done all of the homework except this problem. I can't for the life of me figure out why a ... | 5 | [
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0.00077... | 28,746 | 28746 | |
A New Wideband Mutual Coupling Compensation Method for Adaptive Arrays Based on Element Pattern Reconstruction
International Journal of Antennas and Propagation
Volume 2014 (2014), Article ID 386920, 9 pages
http://dx.doi.org/10.1155/2014/386920
Research Article
A New Wideband Mutual Coupling Compensation Method for ... | 4 | [
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-0.03759765625,
0.0131225... | 28,747 | 28747 | |
A Mutual Algorithm for Optimizing Distributed Source Coding in Wireless Sensor Networks
International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 783798, 9 pages
http://dx.doi.org/10.1155/2012/783798
Research Article
A Mutual Algorithm for Optimizing Distributed Source Coding in Wireless Sen... | 4 | [
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Dot Product: Unit Vector & Projections
September 12th 2010, 05:32 PM #1
Member
Joined
Mar 2010
Posts
107
Dot Product: Unit Vector & Projections
Question 1.
Find a unit vector that is orthogonal to both $i^\rightharpoonup + j^\rightharpoonup$ and $i^\rightharpoonup + k^\rightharpoonup$
My attemp... | 5 | [
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0.0625,
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0.10791015625,
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-0.00262451171875,
-0.... | 28,749 | 28749 | |
Coordinate Geometry
October 19th 2010, 07:00 AM
Ilsa
Coordinate Geometry
Three points have coordinates A(-2,-1), B(10,6) and C(a,-6). Given AB=BC find the possible values of a. If the figure ABCD is a rhoMbus, find the coordinates of D.
October 19th 2010, 07:54 AM
HallsofIvy
Quote:
$AC= \sqrt{(-2-a)... | 4 | [
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-0.01153564... | 28,750 | 28750 | |
Taylor series and the forward finite difference method
September 5th 2011, 10:25 AM #1
Newbie
Joined
Sep 2011
Posts
2
Taylor series and the forward finite difference method
For my computational fluid dynamics course I've been given a multi-step problem to solve. I've tried solving this numerous times but... | 4 | [
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-0.059570312... | 28,751 | 28751 | |
Closest Point on a 3D Quadratic Surface
February 8th 2010, 08:22 AM #1
Newbie
Joined
Feb 2010
From
Midlands
Posts
3
Closest Point on a 3D Quadratic Surface
Hi All, first post, hope I'm obeying all the rules
If I have a 3d quadratic surface defined by $ax^2+by^2+cz^2+d=0$ and a point in space def... | 5 | [
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Equation of plane through two points and parallel to line
May 18th 2011, 03:45 PM #1
Newbie
Joined
May 2011
Posts
2
Equation of plane through two points and parallel to line
Find the equation of the plane passing through the points (3, 2, -1) and (1, -1, 2) that is parallel to the line r(t) = <1, -1, 0> ... | 4 | [
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0.031494140625,
-0.05078125,
-0.0834960... | 28,753 | 28753 | |
Rate problem
February 9th 2009, 06:13 PM #1
Newbie
Joined
Feb 2009
Posts
2
Rate problem
i cant seem to figure this question out could someone tell me the equations for this question please?
In a marathon race. Tom ran part of the 42km at an average of 10k/h and walked the rest at an average 6km/h.... | 4 | [
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0.04272460... | 28,754 | 28754 | |
What's In This Polyhedron?
by
Copyright, Octob... | 4 | [
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0.033935546875,... | 28,755 | 28755 | |
Factor of the polynomial
January 1st 2009, 02:34 PM #1
Member
Joined
Sep 2008
Posts
239
Factor of the polynomial
a) Show that 2x-1 is a factor of the polynomial 2x³ - 3x² - 11x + 6
Find the other factors of the polynomial
b) Find, correct to three decimal places, the values of t satisfying
... | 4 | [
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-0.031494140625,
0.045654296875,
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0.046875,
-0.059326171875,
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0.0283203125,
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0.0084838867... | 28,756 | 28756 | |
Gr 12. Vector Question Involving Dot Product of Two Vectors(Part 3)
February 17th 2009, 03:43 PM #1
Junior Member
Joined
Feb 2009
Posts
27
Gr 12. Vector Question Involving Dot Product of Two Vectors(Part 3)
Okay, the last one for today hopefully phew...!
I can guaranteed this one is DIFFICULT!!!
... | 4 | [
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0.032... | 28,757 | 28757 | |
partial fractions problem
December 30th 2009, 12:37 PM #1
Newbie
Joined
Apr 2009
Posts
16
partial fractions problem
Hi all ...
Here is an integration which we use partial fractions
I coulnd get the four constants .. any help?
$\int \frac{4x^2+3}{(x^2+x+1)^2}dx =$
$<br /> x^2+x+1 = \lef... | 5 | [
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integration problem (partial fractions)
March 24th 2009, 01:56 PM #1
Newbie
Joined
Mar 2009
Posts
1
integration problem (partial fractions)
i tried this and really have no idea how to approach this particular question:
apparently, i have to first substitute e^x=u and therefore du=e^xdx which gives du... | 5 | [
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0.0285644531... | 28,759 | 28759 | |
Travelling Wave Solutions of the Schrödinger-Boussinesq System
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 198398, 11 pages
http://dx.doi.org/10.1155/2012/198398
Research Article
Travelling Wave Solutions of the Schrödinger-Boussinesq System
^1Department of Mathematics and Institute of Mathematical ... | 5 | [
-0.08349609375,
0.0281982421875,
0.0291748046875,
0.0308837890625,
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0.05224609375,
-0.045654296875,
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-... | 28,760 | 28760 | |
Online Stochastic Convergence Analysis of the Kalman Filter
International Journal of Stochastic Analysis
Volume 2013 (2013), Article ID 240295, 9 pages
http://dx.doi.org/10.1155/2013/240295
Research Article
Online Stochastic Convergence Analysis of the Kalman Filter
^1Department of Mechanical Engineering at Lafayett... | 4 | [
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Existence and Stability of Positive Periodic Solutions for a Neutral Multispecies Logarithmic Population Model with Feedback Control and Impulse
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 741043, 11 pages
http://dx.doi.org/10.1155/2013/741043
Research Article
Existence and Stability of Positive Per... | 5 | [
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angular speed, tangetial speed.
November 23rd 2007, 03:30 PM
rcmango
angular speed, tangetial speed.
The earth orbits the sun once a year (3.16 x 10^7 s) in a nearly circular orbit radius 1.50 x 10^11 m. With respect to the sun, determine the following.
(a) the angular speed of the earth
rad/s
(b) ... | 4 | [
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0.0... | 28,763 | 28763 | |
MathGroup Archive: May 2005 [00531]
[Date Index] [Thread Index] [Author Index]
Re: Crossing of 3D functions
• To: mathgroup at smc.vnet.net
• Subject: [mg57160] Re: Crossing of 3D functions
• From: Maxim <ab_def at prontomail.com>
•... | 5 | [
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need to solve this problem
a<b<c<d f(x)=(x-a)(x-c)-3(x-b)(x-d) show that the roots of this equation are distinct.
Last edited by grgrsanjay; August 4th 2010 at 05:09 AM.
The simplest way to do this is to look at the values of f(a), f(b), f(c), f(d) f(a)= -3(a- b)(a- d). Since a< b and a< d, both a- b and a- d are les... | 4 | [
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... | 28,765 | 28765 | |
On a Multipoint Boundary Value Problem for a Fractional Order Differential Inclusion on an Infinite Interval
Advances in Mathematical Physics
Volume 2013 (2013), Article ID 823961, 9 pages
http://dx.doi.org/10.1155/2013/823961
Research Article
On a Multipoint Boundary Value Problem for a Fractional Order Differential... | 5 | [
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the encyclopedic entry of derivative
In calculus, a branch of mathematics, the derivative is a measurement of how a function changes when the values of its inputs change. Loosely speaking, a derivative can be thought of as how much a
quantity is changing at some given point. For example, the derivative of the position ... | 4 | [
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Proposition 102
The square on the straight line which produces with a medial area a medial whole, if applied to a rational straight line, produces as breadth a sixth apotome.
Let AB be the straight line which produces with a medial area a medial whole, and CD a rational straight line, and to CD let CE be applied equa... | 5 | [
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Ernie's 3D Pancakes
Yesterday Timothy Chan sent me email about the complexity of min-plus convolution, at least partially laying the question to rest. Timothy's results rely on what is now commonly (if only informally)
known in the computational geometry community as “Chan's technique”:
1. Read the literature.
2. Un... | 5 | [
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Stumped on a trig simplification
August 31st 2008, 07:08 PM
leftyguitarjoe
Stumped on a trig simplification
Some coaching on this would be nice.
All I'm working with is a formula sheet with some identities in it.
Any help at all would be greatly appreciated.
Simplify the expression.
cos(2tan-... | 4 | [
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... | 28,770 | 28770 | |
Finding a f'(x) in a fraction
May 29th 2009, 04:19 PM
hemi
Finding a f'(x) in a fraction
I don't know how I should go about solving down on this problem for $f'(x)$:
$f(x)=\frac{-6x^3+3x^2-2x+1}{x}$
If someone could show me in a step-by-step fashion that would be great. :)
May 29th 2009, 04:23 PM
Ran... | 5 | [
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Appendix B
APPENDIX B
STEP-STARE FPA IMAGER SYSTEM EFFECTIVE RESOLUTION
B-1 INTRODUCTION
Image errors result due to spacecraft-induced quiescent and dynamic disturbances that cause the imaging instrument's Line of Sight (LOS) motion. These errors are characterized by the low frequency
component called "drift" and th... | 5 | [
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Geometry Circle Problem
April 2nd 2012, 06:36 PM #3
Newbie
April 2nd 2012, 06:28 PM #2
MHF Contributor
April 2nd 2012, 06:08 PM #1
Newbie
Re: Geometry Circle Problem
Check your post...are you sure about the 120? Doesn't that look impossible to you?!
Looks more as if the angle is 120 degrees, and you're t... | 4 | [
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Deterministic and Stochastic Bifurcations of the Catalytic CO Oxidation on Ir(111) Surfaces with Multiple Delays
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 790946, 14 pages
http://dx.doi.org/10.1155/2013/790946
Research Article
Deterministic and Stochastic Bifurcations of the Catalytic CO Oxidation ... | 5 | [
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the encyclopedic entry of Free monoid
In
abstract algebra
, the
free monoid
on a
set A
is the
monoid
whose elements are all the finite sequences (or
strings
) of zero or more elements from
A
, with the
binary operation
of
concatenation
. It is usually denoted
A^∗
. The
identity element
is the unique... | 4 | [
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... | 28,775 | 28775 | |
Limit help with conjugates (i think) :)
January 14th 2012, 08:57 PM #1
Newbie
Joined
Jan 2012
Posts
2
Limit help with conjugates (i think) :)
There is something im not getting with this limit and its like a roadblock for the rest of the Homework because i been getting similar results on the next few prob... | 5 | [
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Equation of Circle Tangent to Y-Axis, X-Axis and Line
June 8th 2010, 02:07 PM #1
Newbie
Joined
Jun 2010
Posts
2
Equation of Circle Tangent to Y-Axis, X-Axis and Line
Please help me with the process of finding the equation of a circle in the first quadrant that is tangent to the x-axis, y-axis, and a line... | 4 | [
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-0... | 28,777 | 28777 | |
Math Help
November 26th 2009, 12:06 PM #1
Minimize
Suppose you want to minimize $a_{1}^{2} + \cdots + a_{n}^{n}$ subject to the constraints $a_i >0$ and $a_1+ \cdots + a_n = 1$.
So in the Cauchy Schwarz Inequality do the following: Take $b_1 = \cdots = b_n = 1$. So we have:
$(a_{1}^{2}+ \cdots + a_{n}... | 5 | [
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Heisenberg's Uncertainty Principle
July 18th 2008, 01:54 PM #1
Heisenberg's Uncertainty Principle
Last night in physics, we were diving further and further into Quantum Mechanics, and my professor gave us a simple derivation of Heisenberg's Uncertainty Principle. However, there is something I
don't get. Maybe... | 4 | [
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relative velocity (physics question)
March 4th 2008, 04:14 PM #1
Junior Member
Joined
Dec 2006
Posts
60
relative velocity (physics question)
please help!!
A plane is seen to travel in a direction [S 30 degrees W]. if its ground velocity was 300 km/h and the wind speed is 150 km/h south, what is the ... | 4 | [
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0.... | 28,780 | 28780 | |
integrals pls help asap
January 21st 2008, 06:11 PM #1
Estimate the area under the graph of f(x) = e^-x^2 from x = -2 to x = 2 using four approximating rectangles and midpoints.
divide the interval [-2,2] into four equal sub-intervals. that is, we partition it into the intervals: [-2,-1], [-1,0], [0,1] and [... | 4 | [
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0.0126953125,... | 28,781 | 28781 | |
Preliminary Hybrid Modeling of the Panama Canal: Operations and Salinity Diffusion
Modelling and Simulation in Engineering
Volume 2012 (2012), Article ID 806139, 9 pages
http://dx.doi.org/10.1155/2012/806139
Research Article
Preliminary Hybrid Modeling of the Panama Canal: Operations and Salinity Diffusion
^1Industr... | 4 | [
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Closed Sets and Convergent Sequences
August 10th 2010, 07:41 AM
RedBarchetta
Closed Sets and Convergent Sequences
I was reading this theorem in my analysis text and came across something I could not quite follow:
Theorem: Let S be a subset of the metric space E. Then S is closed if and only if, whenever $p_... | 4 | [
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-0.0... | 28,783 | 28783 | |
Limit of e^x
October 12th 2013, 07:03 AM #1
Limit of e^x
When working with a limit of e^x such as:
The limit as x approaches infinity of $\frac{x^2}{1-e^x}$
Can I simply state that it tends towards 1/((e^inf)/inf) and therefore to 0, or is the limit not yet defined since it tends towards inf/inf below 1... | 5 | [
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roulette number repeat...two workings dif answers..1wrong-why?
March 18th 2013, 01:44 PM
ssadi
roulette number repeat...two workings dif answers..1wrong-why?
Hi,
Suppose a roulette (with 38 numbers) is spun 12 times, and the probability of any number repeated is required.
So:
Working 1: 38C1*12C2*(1... | 4 | [
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-0.07275390625,
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0.00244140625,
-0.0207519531... | 28,785 | 28785 | |
two definitions of Carmichael numbers
September 27th 2009, 12:55 AM #1
Newbie
Joined
Jan 2009
Posts
9
two definitions of Carmichael numbers
I am looking up Carmichael numbers on the internet, and about half define it one way, the other half define it the other way. Both definitions follow:
(N is com... | 4 | [
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0.0029754638671875,
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Ramsey Numbers for Theta Graphs
International Journal of Combinatorics
VolumeΒ 2011Β (2011), Article IDΒ 649687, 9 pages
http://dx.doi.org/10.1155/2011/649687
Research Article
Ramsey Numbers for Theta Graphs
^1Department of Mathematics, Yarmouk University, Irbid 21163, Jordan
^2Department of Mathematics, Statistics,... | 5 | [
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How fast does your Lisp compute 10000 digits of pi? • /r/lisp
all 31 comments
[–]lispm[S] 6 points7 points8 points *
sorry, this has been archived and can no longer be voted on
Unoptimized, but compiled. Just the code thrown at the REPL or compiled from the editor. Including GC time, etc.
Apple MacBook Pro, 2.33 GH... | 4 | [
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... | 28,788 | 28788 | |
the encyclopedic entry of line integral
In
mathematics
, a
line integral
(sometimes called a
path integral
or
curve integral
) is an
integral
where the
function
to be integrated is evaluated along a
curve
. Various different line integrals are in use. In the case of a closed curve in two dimensions or the... | 4 | [
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0.05346679687... | 28,789 | 28789 | |
differentiation past exam question
April 3rd 2008, 04:25 AM
Sweeties
differentiation past exam question
hello everybody!
1. if y= x(x^2 + 4) find dy/dx
2. then find the equation of the tangent to the curve where x=1 giving answer in the form y=mx+c
3. the normal to the curve y=x^3 + ax at coordinate... | 5 | [
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Need help with Mathematical induction question?
October 29th 2012, 05:56 PM
darcangeloel
Need help with Mathematical induction question?
I'm working on a problem and I'm not sure I have this correct on how to do it.
here is the problem
Prove the following statement by mathematical induction:
1/2+1/6+... | 5 | [
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0.0... | 28,791 | 28791 | |
Sequence and Series Question
September 8th 2007, 11:47 AM #1
Newbie
Joined
Jun 2007
Posts
13
Sequence and Series Question
Hey everyone. I haven't been on in quite some time, but I guess that was due to not having school, although I do think I should've helped out those who had similar problems as I did, ... | 4 | [
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Inequalities
Cauchy–Schwarz inequality
From Wikipedia, the free encyclopedia
In mathematics, the Cauchy–Schwarz inequality (also known as the Bunyakovsky inequality, the Schwarz inequality, or theCauchy–Bunyakovsky–Schwarz inequality), is a useful inequality encountered in
many different settings, such as linear alg... | 5 | [
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Homework Help
Posted by tony on Sunday, June 16, 2013 at 11:20pm.
Find cos(A+B).
cos A=1/3 and sin B=-1/2, with A in quadrant I and B in quadrant IV.
• trig - Bosnian, Monday, June 17, 2013 at 12:42am
cos A = 1 / 3
sin A = + OR - sqrt ( 1 - cos A ^ 2 )
sin A = + OR - sqrt ( 1 - ( 1 / 3 ) ^ 2 )
... | 4 | [
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Inverse matrix
February 17th 2010, 04:36 PM #1
Member
Joined
Oct 2009
Posts
195
Thanks
1
Inverse matrix
Find the inverse of the matrix
A = |-1 0 0 0|
|0 -1 3 0|
|0 0 2 0|
|-3 3 -3 2|
Thanks!
also
if you take the matrix A and use a sequence of row operations to reduce it... | 5 | [
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Math Help
$\frac{1}{\sin A}+\frac{1}{\cos A}=\frac{1}{\sin B}+\frac{1}{\cos B}\Rightarrow$ $\Rightarrow\frac{1}{\sin A}-\frac{1}{\sin B}=\frac{1}{\cos B}-\frac{1}{\cos A}\Rightarrow$ $\frac{\sin B-\sin A}{\sin
A\sin B}=\frac{\cos A-\cos B}{\cos A\cos B}\Rightarrow\frac{\sin A\sin B}{\cos A\cos B}=\frac{\sin B-\sin A}{... | 4 | [
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0... | 28,796 | 28796 | |
One more question :P
February 4th 2008, 03:48 PM #1
Junior Member
Joined
Sep 2007
Posts
56
One more question :P
How do you SET UP this question? I can probably do it if I set it up, but I just don't know how to set it up. Also, please EXPLAIN how to set it up so I can set up other problems like this.
... | 4 | [
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Posts by
Total # Posts: 23,956
Trig
since cosb < 0, b is in QII, so sina = 4/5 cosa = 3/5 sinb = 5/13 cosb = -12/13 Now just evaluate ain(a+b) = sina cosb + cosa sinb
Algebra
what's the trouble? They actually give you the equations to solve. What do you get for answers?
trig
depends on the positions of the two name... | 5 | [
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... | 28,798 | 28798 | |
the encyclopedic entry of age distribution
The
residence time distribution
(RTD) of a
chemical reactor
is a probability distribution function that describes the amount of time a
fluid
elements could spend inside the reactor.
Chemical engineers
use the RTD to characterize the mixing and flow within reactors and ... | 4 | [
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