content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
SUVAT - Straight forward question... quadratics
December 13th 2006, 01:14 PM #1
Junior Member
Joined
Aug 2006
Posts
36
SUVAT - Straight forward question... quadratics
Hi Guys,
Here is a pretty straight forward question.
The only problem is, I got confused as to what happens with - and + numbers... | 4 | [
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Pivot Variables in Reduced Row Echelon Form
vanmaiden
I'm still somewhat confused, but not as much as I was before. I can now see the presence of standard basis vectors when we put a matrix into reduced row echelon form, but I don't see how their
independence from the rest of the vectors make their variables the one... | 4 | [
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-0.0212... | 23,301 | 23301 | |
Relation between acceleration and velocity
Clever_name
Hi all,
so my question is can i carryout normal algebraic operations on derivatives, for example:
v=ds/dt and a=dv/dt then eliminating dt a=(dv/ds) *v then, a *ds= v*dv
is that how you derive the relationship between acceleration, velocity and displacement?
Der... | 5 | [
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Estimating potential drops within multi-media capacitors
I was wondering if anyone had any insights on how to estimate or discern the potential drops across a capacitor containing three distinct media between the electrode plates. The system is as follows
Vo-(+) air gap | binary electrolyte phase | plastic phase (-)
... | 4 | [
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Sign confusion of Mirrors/Lenses.
Ahmed Abdullah
Would you clarify things a bit?
Ok here's a worked example.
An object 2cm high is placed 60cm in front of a thin converging lens with a focal length of 20cm. Calculate the position and size of the image.
Lens Power (in dioptres), F = 1/f' = 1/0.2 = +5.00D
Object V... | 4 | [
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Brevet US7711054 - Method of filtering a pixel of an image
DOMESTIC PRIORITY INFORMATION
This is a divisional of U.S. application Ser. No. 10/170,999 filed Jun. 14, 2002; now U.S. Pat. No. 7,272,186 the contents of which are hereby incorporated by reference in their entirety.
The present invention claims priority und... | 4 | [
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Origin of Numbers and Order
January 15th 2013, 05:02 AM
Hartlw
Origin of Numbers and Order
It starts with scratches on a rock (permanent) or in the dirt (temporary).
Integers: 1, 11, 111, 1111, …..
Equality: 11 = 11
Order: 111 > 11, (1111, 1, 11) → (1, 11, 1111) Well Ordering Principle
Pos Inte... | 4 | [
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Constant Acceleration Equation - physicist please!
From my perspective, I believe the confusion has been one of definitions and lack of consistency. Gregor seems to have been seeking a "formula" for converting from one unit to another. In essence, it
is as he said, he was after a formula for the dimensionless numerical... | 4 | [
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Second derivative of implicit differentiation
April 12th 2011, 10:04 AM #1
Newbie
Joined
Apr 2011
Posts
5
Second derivative of implicit differentiation
If x^2 + x + y^3 + y =1 then find y". Your answer must not contain y'. Do not simplify at all.
So I found the first derivative because I dont unders... | 5 | [
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example_growth
Additional Notes & Examples on Time Value of Money
Growing Annuity
A growing annuity, is a stream of cash flows for a fixed period of time,... | 5 | [
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ismomorphism between ... (conmutative algebra)
November 17th 2013, 11:36 AM #1
Newbie
Joined
Mar 2011
Posts
22
ismomorphism between ... (conmutative algebra)
Hello!
I'd like to show that the ring $K[X,Y] / (XY -1)$ is isomorphic to $S^{-1}k[X]$ where S is the multiplicative system of powers of X.
... | 5 | [
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Nonhomogenious Equation
May 14th 2008, 05:04 AM #1
Member
Joined
Sep 2007
Posts
222
I am a bit confused on how to solve the following using the method of undetermined coefficients:
equation: y'' + y - 2y = x + sin2x
So what i have done so far is:
roots are 1, -2 so
Yc = Ae^(x) + Be^(-2x)... | 5 | [
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If n is an integer, is n even? (1) n^2-1 is an odd integer
Author Message
TAGS:
If n is an integer, is n even? (1) n^2-1 is an odd integer [#permalink] 12 Jul 2003, 15:01
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inverse trigonometric differentiation
Draw a triangle such that $\sin(y)=x$. Add the hypotenuse and then differentiate both sides of this equation, remembering y is a function of x.
Hello, myoplex11! No logs are involved in this problem . . . Find the derivative of: $f(x) \:= \:\arcsin(-x)$ As AfterShock pointed out, ... | 5 | [
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Integration technique help, please!
March 18th 2007, 10:06 AM #1
Newbie
Joined
Oct 2006
Posts
15
Integration technique help, please!
What technique should I use to solve this one?
int(16+x^2)^(-3/2)
I tried a few techniques, including partial fractions, but I couldn't work it out. Can anybody h... | 5 | [
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3rd Order NonLinear PDE in MATLAB
May 23rd 2010, 04:54 AM #1
3rd Order NonLinear PDE in MATLAB
I am trying to solve the KDV equation using Matlab. The KDV equation, $\frac{\partial u}{\partial t} + 6u \frac{\partial u}{\partial x} + \frac{\partial^3 u}{\partial x} = 0$, which is a model of
waves on shallow wa... | 4 | [
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series convergence and divergence
November 30th 2008, 02:12 PM #1
Member
Joined
Apr 2008
Posts
171
series convergence and divergence
hey first of all i d like to start this problem off with saying i have no idea what the ! means so i cant even start this problem.. even if the ! wasnt there i d assume thi... | 5 | [
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Physics 20 - dynamics
a 25 n force will accelerate a 15kg object over a horizontal and low friction surface from rest to 2.4 m/s in 1.4 s find the work done on the object.
There are two ways to do this.
The hard way: You know the force and the mass so you can find the acceleration (F= ma). Once you know that, you kno... | 4 | [
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hyperbole trig functions
i know sinh(x) = (e^x - e^-x)/2 but what is sinhInverse(x) equal to?
First of all, the terminology is "hyperbolic" not "hyperbole." We have a function $y = \frac{e^x - e^{-x}}{2}$ To find the inverse we need to switch the roles of x and y: $x = \frac{e^y - e^{-y}}{2}$
and solve for y: $2x = e^... | 5 | [
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-... | 23,318 | 23318 | |
Calculating Electric Flux Φ w/o typical Gaussian surface
The fact that the electrostatic flux through any closed surface is equal to the charge enclosed divided by epsilon-naught can be easily proven using the
divergence theorem
and Coulomb's law (or Gauss' law in differential form).
Start with Coulomb's law:
[tex]... | 4 | [
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Some Paranormed Double Difference Sequence Spaces for Orlicz Functions and Bounded-Regular Matrices
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 419064, 10 pages
http://dx.doi.org/10.1155/2014/419064
Research Article
Some Paranormed Double Difference Sequence Spaces for Orlicz Functions and Bounded-Re... | 5 | [
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QAWF adaptive integration for Fourier integrals
This function attempts to compute a Fourier integral of the function f over the semi-infinite interval [a,+\infty).
I = \int_a^{+\infty} dx f(x) sin(omega x)
I = \int_a^{+\infty} dx f(x) cos(omega x)
The parameter \omega and choice of \sin or \cos is ta... | 4 | [
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Solving the 0/1 Knapsack Problem by a Biomolecular DNA Computer
Advances in Bioinformatics
Volume 2013 (2013), Article ID 341419, 6 pages
http://dx.doi.org/10.1155/2013/341419
Research Article
Solving the 0/1 Knapsack Problem by a Biomolecular DNA Computer
^1Department of Pathology, Tabriz University of Medical Scie... | 4 | [
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Does There Exists Three Consecutive Odd Positive Integers That Are Primes
March 18th 2013, 10:51 AM
Bashyboy
Does There Exist Three Consecutive Odd Positive Integers That Are Primes
Hello,
The exact question is, Prove or disprove that there are three consecutive odd positive integers that are primes, that ... | 4 | [
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Patent US7103180 - Method of implementing the data encryption standard with reduced computation
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to encryption and decryption. The invention relates more specifically to a unique software implementation of the round function ... | 4 | [
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Covariance equations of motion and symmetry
1. The problem statement, all variables and given/known data
Hi, I need to proof the covariance of the equations of motion under an infinitesimal symmetry transformation.
2. Relevant equations
Equations of motion:
[tex]
E_i = \left(\frac{\partial L}{\partial \chi^i}\right) ... | 4 | [
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Evaluate the limit as y approaches 4
Register to reply
by hunt3rshadow
Tags: approaches, evaluate, limit
P: 10 1. The problem statement, all variables and given/known data
Evaluate lim y→4
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Sequence of numbers
September 27th 2011, 12:58 PM
seventhson
Sequence of numbers
I have a number theory problem with solution but i dont understand why one can write this equallity (green question mark). Because 1122 is not 11*22 or 111222 is not 111*222.
ImageShack® - Online Photo and Video Hosting
Se... | 4 | [
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Optimization of Right circular cylinder
October 21st 2013, 10:25 PM
Jonroberts74
Optimization of Right circular cylinder
A soft drink can in the shape of a right circular cylinder is to have the capacity for 250mm^3. If the diameter of the can must be no less than 4cm and no greater than 8cm, find the dimensions... | 5 | [
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0.08740234375,
0.0771484375,
0.01300048828125,
-0.0291748046875,
0.06396484375,
0.027465... | 23,328 | 23328 | |
Thin Film CIGS Solar Cells, Photovoltaic Modules, and the Problems of Modeling
International Journal of Photoenergy
Volume 2013 (2013), Article ID 817424, 11 pages
http://dx.doi.org/10.1155/2013/817424
Research Article
Thin Film CIGS Solar Cells, Photovoltaic Modules, and the Problems of Modeling
DEIM, University of... | 4 | [
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0... | 23,329 | 23329 | |
Towards Support for Software Model Checking: Improving the Efficiency of Formal Specifications
Advances in Software Engineering
Volume 2011 (2011), Article ID 869182, 13 pages
http://dx.doi.org/10.1155/2011/869182
Research Article
Towards Support for Software Model Checking: Improving the Efficiency of Formal Specifi... | 4 | [
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0.0419921875,
-... | 23,330 | 23330 | |
Kalman filtering application
February 23rd 2009, 04:25 AM
atlove
Actually, i am going to use VB.net to build such a model. Before that, i need to understand how to build this mathematics model.
I have tried to use the code you posted before in MatLab, but i was given a different graphic and not similar to yo... | 5 | [
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How to find where two circles intersect
December 10th 2010, 01:32 AM #1
Member
Joined
Jul 2009
From
London
Posts
109
How to find where two circles intersect
Hello
If I have these two circles:
(x + 1)^2 + y^2 = 25
and
(x - 2)^2 + (y-1)^2 = 9
How do I work out where the circles ... | 4 | [
0.0301513671875,
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-0.07421875,
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Journal Bearings Lubrication Aspect Analysis Using Non-Newtonian Fluids
Advances in Tribology
Volume 2013 (2013), Article ID 212568, 9 pages
http://dx.doi.org/10.1155/2013/212568
Research Article
Journal Bearings Lubrication Aspect Analysis Using Non-Newtonian Fluids
Laboratory of Mechanical Engineering and Developm... | 4 | [
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0.0607... | 23,333 | 23333 | |
system of linear equations question
April 18th 2011, 08:29 PM #1
Member
Joined
Nov 2010
Posts
93
system of linear equations question
Hello, I have the following set of three linear equations. I am trying to solve for x,y,z using substitution.
x - y - z = 0
-2x + 4y = 0
3y - 2z = 3
My fi... | 4 | [
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... | 23,334 | 23334 | |
Physics Forums - View Single Post - Quick Lagrangian of a pendulum question
Lucy Yeats
I've got the first bit:
L=(m/2)(l^2)(dθ/dt)^2-mgl(1-cosθ)
E.O.M.: d2θ/dt2+(g/l)sinθ=0
d2θ/dt2+(g/l)θ=0 in the small angle approximation,
which is S.H.M. with ω^2=√(g/l) (though I'm not sure about this as there's no minus sign in ... | 4 | [
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Quadratic Transformations urgent
September 28th 2008, 11:15 AM
jemadd2
Quadratic Transformations urgent
(Angry)
I need a little help with this problem...
Number of coputers produced-Profit
50---------------------------$5100
100--------------------------$5600
150--------------------------$110... | 4 | [
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... | 23,336 | 23336 | |
Linear transformation formula
October 23rd 2012, 07:20 PM #1
Junior Member
Joined
Nov 2008
Posts
54
Linear transformation formula
Hi,
I am trying to understand and solve the following problem:
Let T: $R^2 -> R^2$ be a linear transformation. Find a formula for $T(x_{1}, x_{2})$ given that
$... | 5 | [
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... | 23,337 | 23337 | |
Derivative of Trig Function
f( θ)= ( θ+1)cos θ f'( θ)=(1)-sin θ f"9 θ)=-sin θ Is this correct?
No. Apply the product rule: f(x)=uv f'(x)=u'v+uv' Let u=(theta+1) and let v=cos(theta)
Oops. Sorry about that! I meant use the 'product rule'. Which is exactly what I posted. $<br /> \begin{gathered}<br /> f(\theta ) = (\th... | 5 | [
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Separation of Variables
January 3rd 2010, 04:20 PM #1
Newbie
Joined
Jan 2010
Posts
4
Separation of Variables
i need help with a problem involving separation of variables. here's the entire problem:
let v(t) be the velocity, in feet per second, of a skydiver at time t seconds, t > or = 0. after her p... | 5 | [
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Distance Formula with Roots
November 17th 2007, 01:47 PM
FactoringAnguish
Distance Formula with Roots
Hey guys! I'm having problems with some problems regarding the distance formula and I am thoroughly stumped, so I kindly ask for help please. I'm fine solving distance without roots but when the
roots came i... | 4 | [
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Patent US6957357 - Clock synchronization with removal of clock skews through network measurements in derivation of a convext hull
The present application claims priority from U.S. Provisional Patent Application No. 60/244,228, filed Oct. 30, 2000.
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention ... | 4 | [
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... | 23,341 | 23341 | |
Patent US6751773 - Coding apparatus capable of high speed operation
BACKGROUND OF THE INVENTION
The present invention relates to a coding apparatus for generating a convolutional code sequence for use mainly in telecommunications.
In the field of mobile communications, a convolutional code is often used. This is beca... | 4 | [
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0.... | 23,342 | 23342 | |
Angles of a triangle
September 10th 2009, 08:23 PM
dhiab
Angles of a triangle
Prove that if $A,B,C$ are angles of a triangle , then :
$<br /> <br /> \begin{array}{l}<br /> 1)\cos A + cosB + \cos C \le \frac{3}{2} \\ <br /> 2)\sin \frac{A}{2}\sin \frac{B}{2}\sin \frac{C}{2} \le \frac{1}{8} \\ <br /> \end{arra... | 5 | [
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-0.05078125,
... | 23,343 | 23343 | |
Difference equation
January 9th 2011, 08:15 AM #1
Junior Member
Joined
Sep 2010
From
London
Posts
28
Difference equation
Hi, I have a problem with below exercise:
Express the solution to each of the following counting problems in terms of a difference equation, then use a generating function to s... | 5 | [
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0.0142822... | 23,344 | 23344 | |
George Price, Group Selection, and Altruism
This concludes a series of posts on the work of George Price. For the most recent one, with links to the others, see here*. This final post covers the subject of group selection.
Price and Group Selection
The application of Price’s Equation to group selection, and the relat... | 4 | [
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0.03710937... | 23,345 | 23345 | |
Patent US8184268 - Method for multi-target-enabled resolution of phase ambiguity
The invention relates to a method for multi-target-enabled resolution of a phase ambiguity, a computer program product and a range finder.
In the area of non-contact distance measurement, various measuring principles and methods of measur... | 4 | [
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... | 23,346 | 23346 | |
Patent US5692008 - Apparatus for estimating a line of sight signal propagation time using a reduced-multipath correlation function
CROSS REFERENCE TO RELATED APPLICATIONS
The application is a continuation of application Ser. No. 08/157,476, filed Nov. 24, 1993.
BACKGROUND OF THE INVENTION
1. Field of the Invention
... | 4 | [
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0.005706787109375,... | 23,347 | 23347 | |
Graph transformations
February 11th 2009, 10:53 AM #1
Newbie
Joined
Sep 2008
Posts
8
Graph transformations
hey need some help with a question im struggeling with:
The equation of a curve is y=f( x ) where f( x )= x2 - 6x +14
a ) complete the square for f, ( x )
b) Hence Sketch the graph of... | 4 | [
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-0.107421875,
-0.01... | 23,348 | 23348 | |
Complex Multi-Step Inequality Problem - Pokemon Forum - Pokemon Elite 2000
You solve it the same way you'd solve a regular equation with a = sign.
The main difference is if you divide or multiply by a negative number, you need to switch the inequality sign around.
This site might help. It goes through each step of th... | 4 | [
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0.0235... | 23,349 | 23349 | |
Odds and probability question!
March 17th 2010, 03:30 PM #1
Newbie
Joined
Mar 2010
Posts
12
Odds and probability question!
If the odds in favour of Boris beating Elena in a chess game are 5 to 4,
what is the probability that Elena will win an upset victory in a best-of-five chess tournament?
I f... | 5 | [
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0.029296875,
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The DFT: Frequency Doman with a Computer Analysis
We just covered ideal (and non-ideal) (time) sampling of CT signals. This enabled DT signal processing solutions for CT applications (Figure 1):
Much of the theoretical analysis of such systems relied on frequency domain representations. How do we carry out these frequ... | 4 | [
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0.0128784179... | 23,351 | 23351 | |
Is the midpoint of an elipse's "cord", through the center, the midpoint of the curve?
September 11th 2010, 10:40 AM #1
Is the midpoint of an elipse's "cord", through the center, the midpoint of the curve?
Consider an elipse centered at (0, 0). It intersects the x-axis at (a, 0) and (-a, 0), and it intersects the ... | 5 | [
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0.07177734375,
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0.10888671875,
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-0.064... | 23,352 | 23352 | |
Blocking set in a projective plane.
up vote 1 down vote favorite
Let S be any nontrivial blocking set in a projective plane of order q, such that S not containing any line. Let A be a set of points in the same projective plane of order q, raging over all these S.
Is it true that if A$\cap$S != $\phi$ then |A| >= q+1 ... | 5 | [
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-0.002029418945... | 23,353 | 23353 | |
Word Problems,The illumination at a point is inversely proportional to the square
November 2nd 2006, 09:03 PM #1
Junior Member
Joined
Sep 2005
Posts
62
Word Problems,The illumination at a point is inversely proportional to the square
I have two word problems that I do not know what to do. can some please... | 5 | [
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0.0908203125... | 23,354 | 23354 | |
two intersecting circles with a triangle
April 12th 2009, 12:32 PM #1
Newbie
Joined
Dec 2007
Posts
23
two intersecting circles with a triangle
Two circles intersect and have a common chord 24 cm long. The centers of the circles are 21 cm apart. The radius of one circle is 13 cm. Find the radius of the ot... | 4 | [
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-0.0... | 23,355 | 23355 | |
Please help with parametric equations
October 18th 2006, 07:19 PM #1
Newbie
Joined
Oct 2006
Posts
15
Please help with parametric equations
Can somebody help me with the following problems? For each of the following parametric curves, describe the motion of the particle. That is, tell the type of curve, t... | 5 | [
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0.05322265625,
0.0186767578125,
0.0032958984375,
... | 23,356 | 23356 | |
Physics Forums - View Single Post - One-point compactification problem
Yes, so you've proven that [tex]X=\{1/n~\vert~n\in \mathbb{N}\}[/tex] is noncompact, locally compact and Hausdorff. Thus the space has a one-point compactification. This is the space [tex]\{0\}\cup \
{1/n~\vert~n\in \mathbb{N}\}[/tex] with the foll... | 4 | [
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-0.0859375,
... | 23,357 | 23357 | |
Wolfram Demonstrations Project
Bertrand Competition with Linear or Quadratic Costs
This Demonstration offers a quick way of analyzing Bertrand (i.e. price) competition among firms, assuming they are identical and have costs that are linear (no capacity constraints) or quadratic
(capacity constraints). You can choose t... | 4 | [
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... | 23,358 | 23358 | |
[SOLVED] Find inverse of A
February 15th 2010, 03:18 PM #1
Member
Joined
Oct 2009
Posts
175
[SOLVED] Find inverse of A
Okay this doesn't make any sense. I have to find the inverse matrix by using a theorem in my textbook. This theorem uses the adjoint to find the inverse matrix.
Unfortunately it's a... | 4 | [
-0.0057373046875,
-0.01123046875,
0.03125,
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0.0223388671875,
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0.00250244140625,
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0.03759765625,
0.0751953125,
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-0.029296875,
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0.034423828125,
-0.0634765625,
0.0166015625,
... | 23,359 | 23359 | |
Retention Time Variability as a Mechanism for Animal Mediated Long-Distance Dispersal
Abstract
Long-distance dispersal (LDD) events, although rare for most plant species, can strongly influence population and community dynamics. Animals function as a key biotic vector of seeds and thus, a
mechanistic and quantitative ... | 4 | [
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other Functions problems help?
February 25th 2010, 09:58 PM #1
Newbie
Joined
Dec 2009
Posts
12
other Functions problems help?
Statement:
A company advertises on Radio and TV for its product. the profit based on these advertisement has been
determine in 1000 is as P(x,y)=-2x^2-xy-y^2+8x+9y+10
... | 5 | [
0.0196533203125,
0.0177001953125,
-0.0234375,
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0.1328125,
-0.06591796875,
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0.041015625,
0.04541015625,
0.054443359375,
0.1015625,
0.050048828125,
0.01470947265625,
0.010986328125,
-0.031982421875,
-0.0576... | 23,361 | 23361 | |
Enclosed Laplacian Operator of Nonlinear Anisotropic Diffusion to Preserve Singularities and Delete Isolated Points in Image Smoothing
Mathematical Problems in Engineering
Volume 2011 (2011), Article ID 749456, 15 pages
http://dx.doi.org/10.1155/2011/749456
Research Article
Enclosed Laplacian Operator of Nonlinear An... | 4 | [
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... | 23,362 | 23362 | |
locus of the mid-point
September 26th 2007, 08:18 AM #1
Member
Joined
Sep 2007
Posts
176
locus of the mid-point
question: Avariable line passing through the point (5,0) intersects the lines 3x-4y=0 and 3x+4y=0 at H and K respectively. Find the equaion of the locus of the mid point of HK.
here is my ... | 4 | [
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-0.0125732421875,
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0.162109375,
-0.06494140625,
-0.01916... | 23,363 | 23363 | |
Patent US4679163 - Inverse discrete cosine transform calculation processor
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to inverse discrete cosine transform calculation processors, employed in particular in systems for decompressing and decoding digital television picture signal... | 4 | [
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0.... | 23,364 | 23364 | |
Converge of Diverge
November 15th 2008, 03:04 AM
Jojo123
Converge of Diverge
Determine whether those series are converge and diverge?if possible, find the limit of the convergent series.
1. ∑ (n^+2^n)/(n+3^n) from n=1 to infinite
2. log(8n^2 + 1) + 2 log(1/n)
3. [√(n^4+ 3n^2+ 1)] - n^2 -1 ( just this... | 5 | [
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-0.058837... | 23,365 | 23365 | |
Modular Arithmetic
April 27th 2010, 11:48 PM
Mundaka
Modular Arithmetic
Hi,
Just need help with a couple of Q's.
Using Euclids algorithm, find:
3568a = 1 mod 1127
and
Use Euclids algorithm to find x and y so 6804x +1343y = 1
Ty for any help.
April 28th 2010, 03:24 AM
tonio
Qu... | 4 | [
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search results
Expand all Collapse all Results 1 - 1 of 1
1. CMB 1998 (vol 41 pp. 125)
Uniform approximation to Mahler's measure in several variables
If $f(x_1,\dots,x_k)$ is a polynomial with complex coefficients, the Mahler measure of $f$, $M(f)$ is defined to be the geometric mean of $|f|$ over the $k$-to... | 4 | [
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0.01312255859375,
0.062... | 23,367 | 23367 | |
Binomial expansion
April 17th 2010, 06:21 AM #1
Super Member
Joined
Dec 2009
Posts
755
Binomial expansion
Find the coefficients of $x^7$ in the expansion of $(1-3x^2)(x^2-\frac{2}{x})^7$
My attempt:
to obtain $x^7$, coefficients of $x^5$ and $x^7$ have to be used.
$T_{r+1}= (7Cr)(x^2)^{7-r... | 4 | [
-0.0007171630859375,
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-0.005584716796875,
-0.018... | 23,368 | 23368 | |
Math Help
March 2nd 2007, 11:18 AM #1
Member
Joined
Nov 2005
Posts
111
well driller
I am posting this problem here since I got to turn it in 2 hours:
It was originally posted in the probability forum for college.
the probability is 0.6 that a well driller will find a well of water at a depth le... | 5 | [
0.0033111572265625,
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0.11328125,
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A Unified Framework for DPLL(
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 964682, 13 pages
http://dx.doi.org/10.1155/2013/964682
Research Article
A Unified Framework for DPLL(T) + Certificates
^1Tsinghua National Laboratory for Information Science and Technology (TNList), Beijing 100084, China
^2Sc... | 4 | [
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IntroductionThe Theory of Multiwavelets and the Symmetric Lifting SchemesMultiwavelet TransformMultiwavelet Lifting SchemeTheorem 2.1Definition 2.2The Symmetric Lifting SchemeRedundant Multiwavelet TransformRedundant Symmetric Lifting Schemes and the Improved Neighboring CoefficientsImproved Neighboring Coefficients De... | 4 | [
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0.026489257... | 23,371 | 23371 | |
Equicontinuity Question
April 1st 2011, 11:41 AM #1
Equicontinuity Question
Let $f$ be a continuous function on $\mathbb{R}$. Let $f_n = f(nt)$ for $n \in \mathbb{N}$ be equicontinuous on [0,1]. I.e., $\forall \epsilon >0, \exists \delta >0$ such that if $|x-y| < \delta$
, then $|f_n(x) - f_n(y)| < \epsilon$ ... | 5 | [
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0... | 23,372 | 23372 | |
Prove 1x = x from linear space axioms
Yes you should have said 0x = O, and it's true that in the special case of the real number O and 0 coincide, but it's not true in general so for general elements you should not write 1 + (-1) = O. In
the same way in the real numbers we can perform multiplication, but this is not tr... | 4 | [
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0.0... | 23,373 | 23373 | |
Assistance required with what seems a basic simplification.
January 3rd 2011, 12:40 AM #1
Junior Member
Joined
Mar 2010
Posts
47
Assistance required with what seems a basic simplification.
My expression is -3=[(-x*pi)/(sqrt(1-x^2))]
An online equation solver gave a solution of x=3/[sqrt(9+pi^2)] or ... | 4 | [
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-0.0013885498046875,
-... | 23,374 | 23374 | |
Matrices and Determinants
January 4th 2007, 11:17 PM #1
Newbie
Joined
Dec 2006
Posts
3
1) Use Gauss-Jordan elimination to solve the following system of equations.
3x+5y=7
6x-y=-8
a: x=2, y=1 b: x=5, y=6 c: x=3,y=-1 d: x=-1, y=2
2)Use Gauss-Jordan elimination to solve the following system ... | 5 | [
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0.036376953125,
-0.02197265625,
-0.0383300... | 23,375 | 23375 | |
Finding x- and y-intercepts of a parabola.
August 1st 2011, 10:00 AM #1
Senior Member
Joined
Jul 2008
Posts
313
Finding x- and y-intercepts of a parabola.
I am asked to use algebra to find the x and y intercepts from the following equation;
y = - x^2 + 3x + 8
2
Note; - x^2 above means - x^2... | 4 | [
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Patent US3987284 - Conic generator for on-the-fly digital television display
FIELD OF THE INVENTION
The invention disclosed herein relates to digital television display systems and more particularly to apparatus for generating conic shapes in a coded, on-the-fly digital television display.
BACKGROUND OF THE INVENTION... | 4 | [
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0.001922607421875,... | 23,377 | 23377 | |
Simple Inequality
May 31st 2010, 07:55 AM
craig
Simple Inequality
Just a quick question on a pretty simple inequality question:
$|1-\frac{1}{x}|<1$
$-1 < 1-\frac{1}{x}<1$
$-2 < \frac{-1}{x}<0$
$0 < \frac{1}{x}<2$
Up to here is simple enough. Now if I take the reciprocal of both sides, I ... | 4 | [
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0.... | 23,378 | 23378 | |
Riemann sum
November 21st 2006, 09:53 PM #1
Member
Joined
Nov 2005
Posts
172
Riemann sum
Consider the function $f(x) = \frac {x^2}{3} - 9$
In this problem you will calculate $\int_{0}^{2} ( \frac {x^2}{3} - 9) \,dx$ by using the definition
$\int_{a}^{b} f(x) \,dx = \lim_{n \to \infty} \left[ \su... | 5 | [
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... | 23,379 | 23379 | |
C
This talk focus on the analysis of solutions $\Omega_0$ to problems of shape optimization among convex planar sets, that is to say: \begin{equation*} J(\Omega_0)=\min\{J(\Omega),\ \Omega\ \textrm
{convex},\ \Omega\in\mathcal S_{ad}\}, \end{equation*} where $\mathcal S_{ad}$ is a set of 2-dimensional admissibl... | 4 | [
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0.060546875,
-0.046142578125,... | 23,380 | 23380 | |
Third Derivitive of Decreasing Function
January 20th 2009, 04:54 AM #1
Newbie
Joined
Jul 2008
Posts
14
Third Derivitive of Decreasing Function
Hi guys, im stuck on a problem, this is it:
------
Let f(x) = - u''(x)/u'(x)
Show that if f(x) is decreasing then u'''(x) is greater than 0.
---... | 5 | [
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http://www.artofproblemsolving.com/Forum/viewtopic.php?t=278908
View topic - nice probability problem • Art of Problem Solving sir see this post .they are giving the answer 1/2 how it is possible
There are n people in a class. The first person forgets his seat, and just picks one randomly. The next n-1 people ope... | 4 | [
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... | 23,382 | 23382 | |
Math Help
April 11th 2009, 05:42 PM #1
Banned
Joined
Mar 2009
Posts
256
Thanks
1
set identities
Are the following provable:
a) if, xεΑ===>yεA,then x=y.If not write a counter example
b) (SxT)xU = Sx(TxU) <=====> $S=\emptyset\vee T=\emptyset\vee U=\emptyset$
nope, let
$A = \{ x \mid... | 5 | [
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-0.03442... | 23,383 | 23383 | |
Patent US7663379 - Capacitance-to-voltage conversion method and apparatus
The invention relates to a method of capacitance-to-voltage conversion with an external sensor capacitor and a capacitance-to-voltage converter implemented on an integrated readout circuit that
includes a reference capacitor, a sampling capacitor... | 4 | [
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Adaptive Exponential Stabilization for a Class of Stochastic Nonholonomic Systems
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 658050, 6 pages
http://dx.doi.org/10.1155/2013/658050
Research Article
Adaptive Exponential Stabilization for a Class of Stochastic Nonholonomic Systems
College of Mathematic... | 4 | [
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Line Integral over Curve
April 27th 2010, 10:00 PM
veritaserum2002
Line Integral over Curve
Calculate $\int_{C} z dx+x dy+y dz$
where C is the curve obtained by intersecting surfaces $z=x^2$ and $x^2+y^2=4$, oriented so that the z-coordinate increases along C.
April 28th 2010, 02:37 AM
Failure
Quote... | 4 | [
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-0.0242919921875,
0.048583984375,
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0.1064453125,
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0.06494140625,
-0.0703125,
0.05322265625,
-0.06982421875,
... | 23,386 | 23386 | |
Could use some Derivation help, please
April 12th 2008, 05:44 AM #1
Junior Member
Joined
Feb 2008
Posts
71
Could use some Derivation help, please
Okay so I just started with derivation.. it's pretty damn fun but the Swedish standard math book sucks completly because they can't give a decent example even ... | 5 | [
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0.06298828125,
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0.04638671875,
-0.0888671875,
... | 23,387 | 23387 | |
Infinite series (Analysis)
December 7th 2008, 03:26 PM
thahachaina
Infinite series (Analysis)
Hey guys,
How do I prove that (1/nx) --> 0 pointwise but not uniformly on (0,1) as n tends to infinity.
thanks in advance, I appreciate your help.
December 7th 2008, 08:57 PM
CaptainBlack
Quote:
O... | 5 | [
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0.0380859375,
-0.101074218... | 23,388 | 23388 | |
Convergence Proof
November 17th 2008, 07:07 PM #1
Junior Member
Joined
Sep 2008
Posts
26
Convergence Proof
if Sn is the summation of partial sums from 1 to infinity of (log n)^-logn, prove whether Sn converges or diverges.
It gives a hint of using the 2^m test which states that if Am is a nonincreas... | 5 | [
0.01806640625,
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-0.01080322265625,
-0.02... | 23,389 | 23389 | |
Shapiro-Wilk
Shapiro-Wilk Original Test
We present the original approach to the performing the Shapiro-Wilk Test. This approach is limited to samples between 3 and 50 elements. By clicking here you can also review a revised approach using
the algorithm of J. P. Royston which can handle samples with up to 5,000 (or ev... | 5 | [
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0.0625,
0.060546875,
-0.0235595703... | 23,390 | 23390 | |
real hard problem
April 16th 2009, 12:12 PM
mancillaj3
real hard problem
Suppose that $lim_{x\rightarrow a}$$f(x)$ exist and is positive. Show that for any positive integer n we have
$<br /> \lim_{x\rightarrow a} \sqrt[n]{f(x)} = \sqrt[n]{\lim_{x\rightarrow a} {f(x)}}<br />$.
April 17th 2009, 12:28 PM
Opal... | 5 | [
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Understanding the math of inductance
Jayen
Hello all,
emf (voltage induced) = -N Δ[itex]\Phi[/itex] / Δt
where N = number of turns in the coil
[itex]\Phi[/itex] = Flux density (BA) measured in Teslas
B = I think this depends on the type of coil, for a solenoid B = Mo n I
where Mo = 4pi x 10-7
n = number of turn... | 4 | [
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-0.0191650390625,... | 23,392 | 23392 | |
Determine the smallest value
October 5th 2012, 11:42 AM #1
Newbie
Joined
Sep 2012
From
Poland
Posts
6
Determine the smallest value
Troubles again
Determine the smallest value of $|20^m-9^n|$ ; m and n are positive integers.
I created a graph of it and as far as I've noticed 11 is the smallest... | 5 | [
0.032958984375,
0.06201171875,
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0.054443359375,
0.... | 23,393 | 23393 | |
3x3 eigenvectors. Clueless.
April 6th 2008, 07:26 AM #1
Newbie
Joined
Apr 2008
Posts
2
I admit this isn't too urgent, so apologies, but I'm posting here because I have exams quite soon and my inability to do this particular problem is getting a bit frustrating, not to mention
worrying.
Anyway, I ... | 5 | [
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linear algebra- upside down y symbol??
March 11th 2009, 04:08 PM #1
Junior Member
Joined
Mar 2009
Posts
30
linear algebra- upside down y symbol??
For the matrix
A =
[6 3 3
3 6 3
3 3 6]
determine all possible values of ** such that det(A − **I3) = 0.
NOTE...where the ** are ther... | 5 | [
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0.006530761... | 23,395 | 23395 | |
Mean Value Theorem Proof Exercise...
November 9th 2009, 01:34 PM #1
Senior Member
Joined
Jan 2009
Posts
296
Mean Value Theorem Proof Exercise...
At least I believe you need the Mean Value Theorem:
Let f:[0,1]->R and g:[0,1]->R be differentiable with f(0)=g(0) and f'(x)>g'(x) for x in [0,1]. Prove th... | 5 | [
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-0.04248046875,
-0.029541... | 23,396 | 23396 | |
Circle is parallelizable.
March 20th 2009, 02:45 AM
Different
Circle is parallelizable.
it is clear (geometrically) that ${\mathbb S}^1$ is parallelizable because we can consider a vector field of unit tangent vectors at each point (say, in anti-clockwise direction).
I am having trouble understanding how to... | 5 | [
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0.04345... | 23,397 | 23397 | |
an algebraic question
December 6th 2009, 12:12 AM #1
Banned
Joined
Dec 2009
Posts
17
an algebraic question
I haven't found an answer to that question, and certainly not sure if there is one. lol, I had nothing to do, so I was playing with my calculator, then I thought, "how do I find the remainder of
... | 4 | [
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0... | 23,398 | 23398 | |
proof of existence of z in x < z < y
May 23rd 2009, 05:11 PM #1
Junior Member
Joined
Sep 2007
From
Minnesota
Posts
37
proof of existence of z in x < z < y
If x and y are arbitrary real numbers with x < y, prove that there is at least one real z satisfying x < z < y.
At my disposal, the least-upp... | 5 | [
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