content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Empirical Evidence on Time-Varying Hedging Effectiveness of Emissions Allowances under Departures from the Cost-of-Carry Theory
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 905329, 8 pages
http://dx.doi.org/10.1155/2013/905329
Research Article
Empirical Evidence on Time-Varying Hedging Effec... | 4 | [
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the encyclopedic entry of Zeeman effect
The
Zeeman effect
is the splitting of a
spectral line
into several components in the presence of a static
magnetic field
. It is analogous to the
Stark effect
, the splitting of a spectral line into several components in the presence of an
electric field
. The Zeeman ef... | 4 | [
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Fourth-Order Deferred Correction Scheme for Solving Heat Conduction Problem
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 574620, 9 pages
http://dx.doi.org/10.1155/2013/574620
Research Article
Fourth-Order Deferred Correction Scheme for Solving Heat Conduction Problem
^1Department of Mathematic... | 5 | [
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the encyclopedic entry of carry through
The mathematical constant e is the unique real number such that the function e^x has the same value as the slope of the tangent line, for all values of x. More generally, the only functions equal to
their own derivatives are of the form Ce^x, where C is a constant. The function e... | 5 | [
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Derivative of composite function including natural logarithm/ln.
March 1st 2011, 10:29 AM
flashylightsmeow
Derivative of composite function including natural logarithm/ln.
Hi, I'm having a problem reconciling my solution with the book I'm working from.
The question is:
Calculate the derivative of:
$... | 4 | [
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The Prbability Density function of the minimum of two random variables
June 26th 2010, 11:19 PM #1
Newbie
Joined
Mar 2010
From
Melbourne
Posts
20
The Prbability Density function of the minimum of two random variables
I am trying to show (or am I even trying to show something that is not valid??) that... | 4 | [
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-0.0... | 30,205 | 30205 | |
Sample Probability
October 30th 2008, 05:21 PM #1
Junior Member
Joined
Apr 2008
Posts
48
The monthly sales of a chocolate company is believed to be normally distributed with a mean of 1,000 bars and a standard deviation of 150 bars.Find the probability that the total sales in the
next year is over 12,... | 5 | [
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Basis Orthogonal complement
March 31st 2010, 04:00 PM #1
Newbie
Joined
Oct 2009
Posts
9
Basis Orthogonal complement
I need to find a basis for the orthogonal complement of the subspace $\begin{array}{cc}t\\-t\\3t\end{array}$ that is orthogonal to the basis vector obtained by letting t = 1.
Ok so i t... | 5 | [
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Find sin2x for each given the following condition:
December 28th 2012, 11:40 AM #1
Newbie
Joined
Dec 2012
From
canada
Posts
13
Find sin2x for each given the following condition:
Find sin2x for each given the following condition:
a) sin x = 4/5 for 90^o < x < 180^o
b)tan x = -2 for 3pi/2 < x... | 4 | [
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Math Help
is it required to memorize trig ratios such as sin pi/3 = sqrt3 / 2? will such ratios be given in examinations?
I'd doubt any exams will require you to memorise these ratios, what I can say is just make sure you are able to re-produce them in exam conditions rather than memorising them individually
are you... | 4 | [
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K and L are each four-digit positive integers with thousands
Author Message
TAGS:
K and L are each four-digit positive integers with thousands [#permalink] 15 Nov 2009, 11:58
... | 4 | [
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Root
September 27th 2009, 09:14 PM
jzellt
Root
Show that for any real constants c and d, the eqation x = c + dcos(x) has at least one root.
My professor gave the hint: Find an interval [a,b] on which
f(x) = x - c - dcos(x) changes sign.
Any advice?
September 27th 2009, 10:17 PM
Calculus26
f(... | 5 | [
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Partial derivative of a function
March 13th 2010, 01:53 AM #1
Partial derivative of a function
What is $\frac{\partial}{\partial x}f(xy)$?
I've tried experimenting but I don't know how to simplify it!! Can someone please tell me where to go?
THANKS
$\frac{\partial}{\partial x} \left( f( g(x,y) \rig... | 5 | [
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Homework Help
Posted by Faramir on Monday, September 25, 2006 at 7:08pm.
I know that standard form is Ax+By=C, but I'm not really sure how to do this problem. All help is welcome. Thanks in advance.
Write an equation for each line:
through (-1,3) and parallel to y=2x+1
I know that the slop will be 2 because it is p... | 4 | [
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-0.0179443359375... | 30,213 | 30213 | |
Derivative / slope related question
July 6th 2009, 04:49 AM #1
Newbie
Joined
Jul 2009
Posts
9
Derivative / slope related question
Hi,
I have a problem stated as such:
"The elevation of a mountain above sea level at (x,y) is given as 3000e^(-(x^2 + 2y^2)/100) meters. Sea level is represented by ... | 5 | [
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Meson State and Mixing Angle of Strange Axial-Vector Mesons
Advances in High Energy Physics
Volume 2013 (2013), Article ID 704529, 5 pages
http://dx.doi.org/10.1155/2013/704529
Research Article
Mass Spectrum of Meson State and Mixing Angle of Strange Axial-Vector Mesons
^1Department of Technology and Physics, Zheng... | 4 | [
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Homework Help
Posted by Timofey on Saturday, May 25, 2013 at 2:08pm.
If 10g of NO react with 20g of O2, what is the maximum amount of NO2 that can be produced?
My answer is
Mol NO = 10/30 = 0.333 mols
Mol O2 = 20/32 = 0.625 mols
To react all the O2 you would need 2 NO*0.625 moles of NO/1mole O2 =1.25 O2? but, we j... | 4 | [
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Working notes
owl:sameAs
The majority of today was spent building examples for the owl:sameAs predicate, and documenting the results.
This ended up being a bigger task than most other predicates. Entailment has to reflect symmetry, transitivity, and reflexivity. It also has to copy every statement which refers to or i... | 4 | [
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-0.062988281... | 30,217 | 30217 | |
Math Help
July 18th 2009, 11:42 AM #1
Divergence
Verify the divergence theorem for $F(x,y,z)=(xz,yz,3z^2)$ in the solid $E$ limited by the paraboloid $z=x^2+y^2$ and the plane $z=1$.
My attempt : They ask me the check that $\int_{\partial E} F \bold n dE= \iiint _E div F dE$ holds.
I've already calculate... | 5 | [
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The crumpled sombrero
November 4th 2007, 06:02 PM #1
The crumpled sombrero
I have rather embarrassing request to make. See, I visualize badly in anything above 2 dimensions, so I have to work hard to figure out equations for 3D shapes. Additionally I am slightly
"technologically challenged" as to 3D graphing ... | 4 | [
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law of sines
Beta=27.5 upsidedown theada=54.5 a= 9.27 find c, b, and theda....
Let me guess: There is a triangle ABC where a = BC = 9.27 b = AC c = AB beta = angle B = 27.5 degrees upsidedown theta (phi?) = angle A = 54.5 degrees theta = angle C If my guess is right, then,
theta = 180 -27.5 -54.5 = 98 degrees --------... | 4 | [
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Nonlinear Autonomous System
May 1st 2010, 01:14 PM
thomas_donald
Nonlinear Autonomous System
Can I get help on the solution of the following 2 systems:
1. dx/dt = -y(y-1) dy/dt = (x-1)(y-1)
2. dx/dt = 1/y dy/dt = 1/x
Thanka a lot for any help.
May 1st 2010, 10:11 PM
kjchauhan
(1) Pl Note that,... | 5 | [
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Matrix Groups
July 25th 2010, 02:42 AM
demode
Matrix Groups
Any help with the following problem is greatly appreciated:
http://img375.imageshack.us/img375/2975/31668142.gif
For the part (a) of this problem, I must show that $M_{a,p}$ belongs to the general linear group of 2x2 matrices over p (a prime) ... | 4 | [
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Physics Forums - W. W. Hansen's Trick to Evaluating Integrals
-
Calculus
(
http://www.physicsforums.com/forumdisplay.php?f=109
)
W. W. Hansen's Trick to Evaluating Integrals
In "Probability Theory: The Logic of Science", the author E. T. Jaynes relates that Prof. Hansen at Stanford evaluated integrals by treat... | 5 | [
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Finding the derivative of an integral
October 16th 2010, 02:09 AM
Glitch
Finding the derivative of an integral
The question:
Find F'(x) for the function F:R -> R given below:
$F(x) = \int^{x^3}_0 {sin(t^2)dt$
My attempt:
It is my understanding that the First Fundamental Theorem of Calculus state... | 5 | [
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numerical analysis of competing species??
January 10th 2009, 12:58 AM
crb
numerical analysis of competing species??
please have a look at the attached picture ...and help me understand what to do next...
thank you for whatever help anyone can provide ...
plz note , i know how to linearize at the equill... | 5 | [
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Computing the limit of a certain recursively defined sequence
up vote 5 down vote favorite
1
The following is not exactly a research question (it was originated from manufacturing of exercises for calculus), and has no other motivation than explaining a phenomenon. I apologize if it is
inappropriate (and will quickly... | 5 | [
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the encyclopedic entry of Brouwer theorem
In
mathematics
, the
Brouwer fixed point theorem
is an important
fixed point theorem
that applies to finite-dimensional spaces and which forms the basis for several general fixed point theorems. It is named after Dutch mathematician
L. E. J. Brouwer
.
Statement
The th... | 4 | [
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0.0390625,
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-0.05859375,
-0.0301513671875,
-0.040771484375,
-0.0688476562... | 30,227 | 30227 | |
Bayesian Non-Parametric Mixtures of GARCH(1,1) Models
Journal of Probability and Statistics
Volume 2012 (2012), Article ID 167431, 16 pages
http://dx.doi.org/10.1155/2012/167431
Research Article
Bayesian Non-Parametric Mixtures of GARCH(1,1) Models
School of Mathematics and Statistics, The University of Western Aust... | 4 | [
-0.1103515625,
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0.06591796875,
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0.0245361328125,
0.11279296875,
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0.0703125,
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-0.068359375,
-0.016845703125,
-0.0301513671875,
-... | 30,228 | 30228 | |
studying; i still don't understand how to calculate this-binomial distribution
Think of a string of letters 15 places long. “FFFFFFFFFFFFFFF” that would be a string of 15 failures and can happen in only with probability $(0.6)^{15}$. That is because P(success) $=0.4$ while P
(failure) $={1-(0.4)}=0.6$. “SFFFFFFFFFFFFF... | 4 | [
0.08056640625,
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0.034423828125,
0.013916015625,
-0.018310546875,
0.05419921875,
-0.00732421875,
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Homogeneous 1st order Differential Equation
February 19th 2011, 06:36 PM
dtwazere
Homogeneous 1st order Differential Equation
Hi guys, I've gotten so far with this but I'm stuck on what to do next:
Have I done the steps correctly? I followed what I was told but maybe I've made a mistake I cannot see.
$... | 5 | [
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0.0... | 30,230 | 30230 | |
Rewrite Log Function in terms of A and B?
October 8th 2012, 01:02 PM #1
Newbie
Joined
Oct 2012
From
New Jersey
Posts
16
Thanks
2
This has been driving me up the wall, I have a test the day after tomorrow and this is DEFINITELY going to be on the test. It seems simple, but for some reason I can't g... | 4 | [
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0.0537109375,
0.0830078125,
0.1416015625,
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The BALM Copula
International Journal of Stochastic Analysis
Volume 2013 (2013), Article ID 652364, 6 pages
http://dx.doi.org/10.1155/2013/652364
Research Article
The BALM Copula
^1Department of Applied Mathematics, Kettering University, Flint, MI 48504, USA
^2Department of Statistics, University of Sao Paulo, CP 66... | 4 | [
0.023681640625,
-0.052490234375,
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0.00793... | 30,232 | 30232 | |
Stress and Strain Analysis of Functionally Graded Rectangular Plate with Exponentially Varying Properties
Indian Journal of Materials Science
Volume 2013 (2013), Article ID 206239, 7 pages
http://dx.doi.org/10.1155/2013/206239
Research Article
Stress and Strain Analysis of Functionally Graded Rectangular Plate with E... | 4 | [
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0.006988525390625... | 30,233 | 30233 | |
Understanding survival analysis: Kaplan-Meier estimate Goel MK, Khanna P, Kishore J - Int J Ayurveda Res
Year : 2010 | Volume : 1 | Issue : 4 | Page : 274-278
Understanding survival analysis: Kaplan-Meier estimate
Manish Kumar Goel^1, Pardeep Khanna^1, Jugal Kishore^2
^1 Department of Community Medicine, Post Gra... | 4 | [
-0.02685546875,
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expand and simplify
September 17th 2010, 05:47 AM #1
Super Member
Joined
Oct 2008
From
Bristol, England
Posts
897
expand and simplify
hi this is my question:
3x^2+4+x(x-1)
for this i know i would do
3x^2+4
but after that im kinda stuck!
would i do
3x^2+4 2x-x = 3x^2+x+4??
... | 4 | [
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0.0140380859375,
-0.0191650... | 30,235 | 30235 | |
integral equation by Laplace transforms and contour integration
November 6th 2011, 06:12 PM #1
Member
Joined
Apr 2008
Posts
204
integral equation by Laplace transforms and contour integration
i have to solve $\int^t_0 f(\tau)sin(t - \tau) d\tau = \cos t - \cos 3t$ by using Laplace transforms and then inv... | 4 | [
-0.06298828125,
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0.018310546875,
-0.03662109375,
0.00643920... | 30,236 | 30236 | |
Math- Calculus
Posted by John on Sunday, March 24, 2013 at 12:49pm.
A company needs to produce a cylindrical can to hold water. It must have a volume of 500ml. The side of the can will cost 40$/m^2 to produce and the top and bottom of the can will cost 50$/m^2 to
produce. Find the most economical dimensions.
• Math... | 5 | [
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0... | 30,237 | 30237 | |
Fermat Last Theorem
February 12th 2013, 03:58 PM #1
Junior Member
Joined
Sep 2010
From
London
Posts
28
Fermat Last Theorem
Hi,
I am not sure if I am approaching the problem below in the right way. Is there any chance that someone can check it for me,please?
Show that the equation
$x^2=... | 4 | [
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-0.... | 30,238 | 30238 | |
More Confusion, (linear algebra)
July 4th 2008, 05:26 AM #1
Newbie
Joined
Jun 2008
Posts
24
More Confusion, (linear algebra)
Handing in date is drawing very close and im losing my mind over this.
\begin{pmatrix}1 & 4 & 6\\3 & 9 & 1\\2 & 6 & 5\\4 & 4 & 9\end{pmatrix}
ive been asked to find the r... | 5 | [
0.033203125,
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0.00... | 30,239 | 30239 | |
Effective Single-Step Posttranscriptional Dynamics Allowing for a Direct Maximum Likelihood Estimation of Transcriptional Activity and the Quantification of Sources of Gene Expression Variability with an Illustration for the Hypoxia and TNF
ISRN Computational Biology
Volume 2013 (2013), Article ID 719138, 11 pages
http... | 4 | [
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0.02514... | 30,240 | 30240 | |
physics motion
June 24th 2007, 09:07 AM #1
Newbie
Joined
Jun 2007
Posts
8
physics motion
. Two runners approaching each other on a straight track have constant speeds of 4.50 m/s and 3.50 m/s, respectively, when they are 100 m apart. How long will it take for the runners to meet, and
at what position... | 4 | [
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0.035400390625,
0.00225830078125,... | 30,241 | 30241 | |
Homework Help
Posted by Yolonda on Thursday, November 29, 2012 at 12:45pm.
Explain how to factor the following trinomials forms: x² + bx + c and ax² + bx + c. Is there more than one way to factor this? Show your answer using both words and mathematical notation.
• Algebra 1b - Yolonda, Thursday, November 29, 2012 a... | 4 | [
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0.11181640625,
0.024169921875,
0.0556640625,
-0... | 30,242 | 30242 | |
Completely stumped on this problem!
October 13th 2009, 04:27 PM
freddy
Completely stumped on this problem!
If x squared = 25, y squared = 16, and z squared = 9 what is the greatest possible value of (x + y - z)squared?
My book says the answer is 144. Can someone please tell me how that the book got this ans... | 4 | [
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... | 30,243 | 30243 | |
Solve the matrix problem
October 29th 2009, 08:30 PM #1
Junior Member
Joined
Jan 2009
From
vancouver
Posts
58
Solve the matrix problem
I have no idea of this question, plz help me !~thanks
Let H be the span of the following six vextors:
V1=[1,-1,0,0]
V2=[1,0,-1,0]
V3=[1,0,0,-1]
v... | 4 | [
0.01031494140625,
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0.057861328125,
-0.0859375,
-0.0... | 30,244 | 30244 | |
the encyclopedic entry of Difference_map_algorithm
The
difference map algorithm
is a
search algorithm
for general
constraint satisfaction
problems. It is a
meta-algorithm
in the sense that it is built from more basic algorithms that perform
projections
onto
constraint
sets. From a mathematical perspective, ... | 4 | [
-0.0654296875,
0.0703125,
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0.01153564453125,
-0.052490234375,
-0.005950927734375,
-0.05517578125,
... | 30,245 | 30245 | |
the encyclopedic entry of bezier curve
In the
mathematical
field of
numerical analysis
, a
Bézier curve
is a
parametric curve
important in
computer graphics
and related fields. Generalizations of Bézier curves to higher
dimensions
are called
Bézier surfaces
, of which the
Bézier triangle
is a special ca... | 4 | [
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-0.000732421875,
... | 30,246 | 30246 | |
another T-invariant question
November 12th 2009, 11:16 AM #1
Member
Joined
Sep 2009
Posts
104
another T-invariant question
Let T be a linear operator on a vector space V, and let v be a nonzero vector in V, and let W be the T-cyclic subspace of V generated by v.
My question is, how do I show that W ... | 4 | [
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0.03515625,
-0.00921630859375,
-0.001502990722... | 30,247 | 30247 | |
Slewing Ring bearing, Functions Bearing Fastening Slewing- Rollix
In order to transmit the loads previously defined, it is necessary
to realise an adequate mechanical fastening of the bearing on
the associated frames, thus forming rigid connection of the ring and its supports.
While several fastening methods are fea... | 4 | [
-0.0634765625,
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-0.02978515625,
0.0976... | 30,248 | 30248 | |
another curve lenght question
March 15th 2008, 12:21 PM
lllll
another curve lenght question
I'm having trouble finding the lenght of the curve where
$x^2 = 2y \ \ \ 3z= xy$, from the origin to the the point (6,18,36). I have no idea how to approach this problem, so any help would be appreciated.
March 15th... | 5 | [
0.0047607421875,
-0.00994873046875,
-0.043212890625,
-0.00750732421875,
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-0.040771484375,
0.1103515625,
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0.02001953125,
0.0216064453125,
-0.016357421875,
0.004119873046875,
-0.0022125244140625,
0.037109375,
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Series converge
$1-\frac{1}{3}\left(1+\frac{1}{2}\right)+\frac{1}{5}\ left(1+\frac{1}{2}+\frac{1}{3}\right)-\frac{1}{7}\left(1+\frac{1}{2}+\frac{1}{3}+\frac{1 }{4}\right)+...$ show that the above series is converges
Looks like somewhat are alternating series to me, find a function to which to fit the pattern of the te... | 5 | [
-0.0213623046875,
-0.07275390625,
0.06982421875,
-0.029296875,
-0.035888671875,
-0.08935546875,
-0.003265380859375,
0.025390625,
-0.01336669921875,
0.027099609375,
-0.031494140625,
-0.1005859375,
-0.0281982421875,
0.002593994140625,
-0.15234375,
-0.043701171875,
0.0235595703125,
-0... | 30,250 | 30250 | |
Optimal Harvesting for an Age-Spatial-Structured Population Dynamic Model with External Mortality
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 184815, 14 pages
http://dx.doi.org/10.1155/2012/184815
Research Article
Optimal Harvesting for an Age-Spatial-Structured Population Dynamic Model with External... | 5 | [
0.0135498046875,
0.031005859375,
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0.03466796875,
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0.0546875,
0.07568359375,
-0.0361328125,
0.01300048828125,
-0.027099609375,
-0.03112... | 30,251 | 30251 | |
Find a and b for complex number
August 11th 2011, 04:25 AM #1
Newbie
Joined
May 2011
Posts
8
Find a and b for complex number
(a+bi)^2=4+4sqrt3i
I got
a^2-b^2+2abi=4+4sqrt3i
a^2=b^2+4
a=sqrt(b^2+4)
2ab=4sqrt3
a=4sqrt3/2b
I can't seem to get the answer when I compare the va... | 5 | [
0.001190185546875,
0.0189208984375,
-0.06396484375,
0.0240478515625,
-0.12353515625,
0.02734375,
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0.0240478515625,
0.09423828125,
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0.0228271484375,
0.0247802734375,
0.001983642578125,
0.0279541015625,
0.01031494140625,
... | 30,252 | 30252 | |
Rotational Motion Physics Problem
Posted by Amar on Wednesday, October 3, 2012 at 6:54pm.
A car starts from rest on a curve with a radius of 150 and accelerates at 1.2.Through what angle will the car have traveled when the magnitude of its total acceleration is 2.2 ?
• Rotational Motion Physics Problem - Elena, Thu... | 4 | [
-0.0291748046875,
0.0235595703125,
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0.03173828125,
-0.043212890625,
... | 30,253 | 30253 | |
Determinants & Matrix Inverses
December 9th 2009, 11:10 AM #1
Member
Joined
Oct 2009
Posts
114
Thanks
1
Determinants & Matrix Inverses
If A and B are n by n, AB = -BA, and n is odd, show that either A or B are not invertible.
Show that no 3 x 3 matrix A exists such that A^2 + I = 0.
Any hel... | 4 | [
-0.083984375,
-0.053955078125,
-0.0654296875,
0.003204345703125,
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-0.057373046875,
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-0.12109375,
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-0.09765625,
0.0869140625,
-0.021484375,
0.01025390625,
0.002105712890625,
-0.01397705078125,
-0.01116943359375,
0.040283203125,
-0.082031... | 30,254 | 30254 | |
Posts by
Posts by andy
Total # Posts: 814
calculus (point me in the right direction please?)
f(x) and f′(x) are continuous, differentiable functions that satisfy f(x)=x^3+4x^2+∫(from 0 to x)(x−t)f′(t) dt. What is f′(5)−f(5)?
calculus (point me in the right direction please?)
thank you steve!
calculus (point me in ... | 4 | [
-0.03955078125,
0.06787109375,
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0.00970458984375,
0.0380859375,
-0.030517578125,
-0.016845703125,
-0.05102539062... | 30,255 | 30255 | |
Damped Harmonic Oscillation Question
April 30th 2009, 07:21 PM
nosh
Damped Harmonic Oscillation Question
If a marble is placed on the end of a horizontal oscillating spring and the harmonic horizontal position of the marble as a function of time is given as :
If x = A ( 2 pi f t)
where A is amplitude... | 5 | [
-0.001190185546875,
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0.0103759765625,
0.09716796875,
0.01... | 30,256 | 30256 | |
Homework Help
Posted by Mary on Friday, December 3, 2010 at 3:44pm.
Kira has feet of fencing. She will use it to form three sides of a rectangular garden. The fourth side will be along a house and will not need fencing. For the area of the garden to be the maximum,
how long should the side opposite the house be?
• ... | 5 | [
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-0.008178... | 30,257 | 30257 | |
lebesgue measure and differentiability
January 14th 2013, 12:22 PM #1
Junior Member
Joined
Oct 2012
From
Bonn
Posts
46
Thanks
1
lebesgue measure and differentiability
Hi there
I've got the following two exercises to solve:
-
Consider the measure space $\([0,\infty\),B,\lambda\)$ whe... | 4 | [
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0.0125732421875,
0.0034637451171875,
-... | 30,258 | 30258 | |
Homework Help
Posted by Anonymous on Monday, November 12, 2012 at 11:05pm.
John invests $2500 in an account that pays a rate r compounded annually. If after 2 years the total interest earned is $650, find the approximate rate of interest
• college algebra - Reiny, Monday, November 12, 2012 at 11:34pm
let the r... | 4 | [
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0.0213623046875,
-0.0717773437... | 30,259 | 30259 | |
Design and Analysis of a Linear Hybrid Excitation Flux-Switching Generator for Direct Drive Wave Energy Converters
Advances in Mechanical Engineering
Volume 2013 (2013), Article ID 963093, 11 pages
http://dx.doi.org/10.1155/2013/963093
Research Article
Design and Analysis of a Linear Hybrid Excitation Flux-Switching ... | 4 | [
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... | 30,260 | 30260 | |
This Thermal House
If you want to make your house more efficient at repelling the unpleasantness outdoors (whether hot or cold), what should you do first? Insulate the walls? Insulate the ceiling? The roof? Better
windows? Draft elimination? What has the biggest effect? While I have regrettably little practical exper... | 5 | [
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0.0322265... | 30,261 | 30261 | |
Question on boundedness
June 18th 2011, 10:50 AM
worc3247
Question on boundedness
Let $a\in\mathbb{R}$ and consider the set $S_a=\{a^n:n\in\mathbb{N},n>0\}$. Prove carefully that a is not bounded above when a>1.
My first thoughts are to use a contradiction, by using the definition of supremum, but I can't s... | 4 | [
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0.026367187... | 30,262 | 30262 | |
Math Help
November 23rd 2006, 10:49 AM #1
Newbie
Joined
Jul 2006
Posts
12
Injective
Happy Thanksgiving to those of you in the States.
I have a problem:
Suppose that a function f [a,b] to R is continuous such that f attains its minimum or maximum on [a,b] at a point c such that
a<c<b.
... | 5 | [
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... | 30,263 | 30263 | |
Percentage question #5
September 11th 2009, 11:03 PM #1
Newbie
Joined
Aug 2009
Posts
15
Sandy has 50% more money than Bradon. Bradon has 20% more money than Clement. After Sandy gives Bradon and Clement a total of $350 and Bradon gives Clement $400, the ratio of Sandy's money to
Bradon's moneey to Cle... | 4 | [
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0.035400390625... | 30,264 | 30264 | |
log change of base...
log (with base (a)) of f(x) is equal to log[f(x)] divided by log(a)
Hello, namp4namp! Solve: . $\log_2(x+1) - \log_4(x) \;=\;1$ .[1] Let: $\log_4(x) \:=\:P\quad\Rightarrow\quad 4^P \:=\:x$ Take logs (base 2): . $\log_2(4^P) \;=\;\log_2(x) \quad\Rightarrow\quad \log_2
(2^2)^P \;=\;\log_2(x)<br />$... | 4 | [
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0.07373... | 30,265 | 30265 | |
number of incongruent sols of x^n [congruent to] 1 (mod p)
April 7th 2009, 11:47 PM
minivan15
number of incongruent sols of x^n [congruent to] 1 (mod p)
If p is a prime number and b is a primitive root modulo p, and n is a positive integer:
first I had to express the general solution of the congruence eqt.... | 4 | [
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... | 30,266 | 30266 | |
no stationary points?
April 4th 2010, 07:55 AM #1
Junior Member
Joined
Mar 2009
Posts
28
8/(2-x) - 1/(1+x)
Why would this curve have no stationary points?
The differential of this expression is : 8/(2-x)^2 + (1+x)^-2
Last edited by osmosis786; April 4th 2010 at 08:17 AM. Reason: more inform... | 4 | [
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Simple Interest
Posted by Thara on Friday, July 31, 2009 at 12:53am.
A $4000 loan made at 11.75% is to b repaid in three equal payments, due 30, 90, and 150 days, respectively, after the date of the loan. Detemine the size of the payments.
Let the amount of each payment be represented by x.
P1=
______x__________=0.... | 4 | [
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0.... | 30,268 | 30268 | |
Quick Quotient Rule Question
July 17th 2012, 07:37 AM #1
Member
Joined
Jul 2012
From
United States
Posts
87
Thanks
3
Quick Quotient Rule Question
Hello all, I have been having some trouble grasping the quotient rule. Here's a sample problem, and I'll point out where I get tripped up.
$f(x)=\... | 5 | [
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0.046142578125,
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0.02160644531... | 30,269 | 30269 | |
Homework Help
Posted by Don on Tuesday, December 20, 2011 at 8:16pm.
If sin = 2/3 and is a second quadrant angle, determine the exact value of sec^2
could be
a. 5/9
b. root5/3
c. 9/4
d. 9/5
Please help.......
• Trig - Lindsey, Tuesday, December 20, 2011 at 8:25pm
If sin = 2/3, the side opposite from the ... | 4 | [
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-... | 30,270 | 30270 | |
algebraic elements and evaluation homomorphism
August 22nd 2009, 02:39 AM #1
Senior Member
Joined
Jul 2009
Posts
254
algebraic elements and evaluation homomorphism
Let F be a subfield of E, $\alpha\in E$and $\alpha$is an algebraic over $F$. Let $\phi_\alpha$be the evaluation homomorphism. $F(\alpha)$is t... | 5 | [
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0.034423... | 30,271 | 30271 | |
Checking my answers
January 12th 2009, 11:51 AM #1
Checking my answers
Would anyone be so kind as to check my answers BEFORE I go over the problems with my child? For some of you math geniuses, these are probably simple, but for someone who is not good @ math, but
trying to learn! it can be quite painful. Tha... | 4 | [
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0.03125,
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-0.017578125,
-0.05078... | 30,272 | 30272 | |
Security Analysis of HMAC/NMAC by Using Fault Injection
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 101907, 6 pages
http://dx.doi.org/10.1155/2013/101907
Research Article
Security Analysis of HMAC/NMAC by Using Fault Injection
^1Center for Information Security Technologies (CIST), Korea University,... | 4 | [
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-... | 30,273 | 30273 | |
cosine function
April 22nd 2007, 04:57 AM
Mr_Green
cosine function
Find an equation for the cosine function that has one maximum at the point (4,6) and its next minimum at the point (5.5,1).
April 22nd 2007, 05:17 AM
topsquark
Quote:
y(x) = A*cos(k*x + (phi))
y'(x) = -A*k*sin(k*x + (phi))
... | 5 | [
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-0.0166015625,
0.0079345703125,
0.036376953125,
-0.044677734375,... | 30,274 | 30274 | |
Groups of Order 6
Can anyone prove that there are only 2 non-isomorphic groups of order 6.
it's a nicer problem to prove that for any prime number $p$ there are only two groups (up to isomorphism) of order $2p.$ (Nod)
can your prove that then. that for any prime number http://www.mathhelpforum.com/math-he...97a8c47a-... | 5 | [
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-0.... | 30,275 | 30275 | |
Proposition 16
Given two circles about the same center, to inscribe in the greater circle an equilateral polygon with an even number of sides which does not touch the lesser circle.
Let ABCD and EFGH be the two given circles about the same center K.
It is required to inscribe in the greater circle ABCD an equilatera... | 4 | [
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-... | 30,276 | 30276 | |
othogonal projections - question about definition
December 22nd 2010, 07:11 PM #1
Senior Member
Joined
Nov 2010
From
Hong Kong
Posts
255
othogonal projections - question about definition
I am a little bit confused by a wording on the orthogonal projection given in my study guide for linear algebra (L... | 4 | [
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solving this fraction
1. January 31st 2011, 06:40 AM #1
2. January 31st 2011, 06:44 AM #2
You correctly multiply each numerator by what's needed to get a common denominator, but then you ignore the common denominator! Since the RHS is not zero, your denominator matters in this
problem.
3. Januar... | 4 | [
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Resistive Ferroresonance Limiter for Potential Transformers
Advances in Power Electronics
Volume 2012 (2012), Article ID 529178, 6 pages
http://dx.doi.org/10.1155/2012/529178
Research Article
Resistive Ferroresonance Limiter for Potential Transformers
^1Department of Electrical Engineering, Islamic Azad University, ... | 4 | [
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-0.03173... | 30,279 | 30279 | |
Explain Domain and range of function f(x)
y= $<br /> \sqrt{25-x^2}<br />$ for domain 25-x^2>=0 x^2<=25 therefor x belongs to [-5,5] hence domain is [-5,5]. Since its minimum value is 0 and maximum 5 and the function is continuous in its
domain so its range is [0,5] note:I hope you know what is range and what is domain.... | 4 | [
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Chemistry 104
Posted by Radha on Sunday, May 11, 2014 at 8:02pm.
The pH of 0.3 HSO3- is:
(How can this problem be solved?)
The final answer is 4.41
However, I keep getting 3.76
• Chemistry 104 - Devron, Sunday, May 11, 2014 at 9:35pm
Ka of HSO3^-=6.3 x 10^-8
HSO3^- --------> H^+ + SO3^-
Ka=[H^+][S... | 5 | [
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-0... | 30,281 | 30281 | |
Separation of variables
October 9th 2010, 06:35 AM #1
Member
Joined
Nov 2009
Posts
75
hi all,
im practising separation of variables for partial differential equations. i came across this site which says:
2. Separation of Variables
'NOTE: In this variables separable section we only deal wit... | 5 | [
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-0.04541015625,
-0.0208740234... | 30,282 | 30282 | |
Channel Estimation for DS-CDMA Systems: A Partial Difference Equation Approach
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 307342, 8 pages
http://dx.doi.org/10.1155/2013/307342
Research Article
Channel Estimation for DS-CDMA Systems: A Partial Difference Equation Approach
^1School of Control ... | 4 | [
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another vector calc question
April 6th 2010, 05:50 PM #1
Member
Joined
Mar 2009
Posts
84
another vector calc question
curl(ФA) at the point (1,1,1)
where A is a vector=(2xz^2)i-(yz)j+(3xz^3)k
and Ф=(x^2)yz
i first multiplied each component of A by (x^2)yz
i then did del cross the vector ... | 4 | [
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Homework Help
Posted by Anonymous on Thursday, October 21, 2010 at 9:53pm.
one number is three more than a second number. Three times the first is 7 less than 2 times the second. Find the numbers.
The value of the second number is ___
• math - Reiny, Thursday, October 21, 2010 at 10:05pm
second number ---- x
... | 4 | [
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0.041015625,
0.0225830078125,
0.011474609375,
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0.0245... | 30,285 | 30285 | |
Greatest Impossible Score in a Game
Date: 01/26/2003 at 12:13:10
From: M Sim
Subject: Greatest impossible score in a game
If the two values possible in a game are p and q, the greatest
impossible score is (pq - p - q). Why is it that?
Example: if two values are 3, 7. Here you can score 3, 6, 7, 9, 10,
12, 13, 14, ..... | 5 | [
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complex number
Hello, prasum! $\text{The centre of circle represented by: }\;|z+1| \:=\:2|z-1|$ $|z+1|\:=\:|z - (\text{-}1)|$ is the distance from $\,z$ to (-1,0). $|z-1|$ is the distance from $\,z$ to (1,0). Code:
| P | o | * * * | * A * | * B - - o - - - - + - - - - o - - -1 | 1 | We want points $P(x,y)$ so that: . $... | 4 | [
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t critical value
October 31st 2009, 07:46 PM
Pengu
t critical value
hi, can someone please help me find the t critical value for this question:
A bookstore recorded the amount spent by a subset of its members for its online gift-shop. The average spent this year was $10.90, with a standard deviation of $2.1... | 5 | [
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Why some solutions of system of linear equations create contradictions?
January 26th 2011, 09:06 AM #1
Newbie
Joined
Jan 2011
Posts
8
Why some solutions of system of linear equations create contradictions?
Lets take a simple system of two equations:
$\begin{cases} a_{1}*q^{2}-a_{1}=15 \\ a_{1}*q^{3}-... | 4 | [
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-0.027... | 30,289 | 30289 | |
finidng the general solution
February 9th 2010, 01:01 PM #1
Newbie
Joined
Feb 2010
Posts
3
Find the general solution of the equation:
1= [3y*cos(y^2)*dy/dx] + [3e^(-x) * ycos(y^2) * dy/dx]
really really stuck on this, any help would be appreciated!
If you factor the RHS you get
$<br />... | 5 | [
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0.0012054443359375,
-0.049072265... | 30,290 | 30290 | |
A New Proof of Central Limit Theorem for i.i.d. Random Variables
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 294910, 5 pages
http://dx.doi.org/10.1155/2013/294910
Research Article
A New Proof of Central Limit Theorem for i.i.d. Random Variables
School of Mathematical Sciences, Qufu Normal University... | 5 | [
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... | 30,291 | 30291 | |
Integral by parts
March 9th 2013, 02:30 PM
Steelers72
Integral by parts
Integral from 9 to 16 lny/sqrt(y)
Here's my work and on the parts bolded I asked for help from someone else but Im not sure WHY he did those steps:
∫ ln(y)⋅y^(−½) dy =
2⋅y^(½)⋅ln(y) − ∫ 2⋅y^(½)⋅(1/y) dy
2⋅y^(½)⋅ln(y) − 2⋅∫ ... | 5 | [
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theorem on adjoint of linear transformation
November 5th 2011, 09:46 AM #1
theorem on adjoint of linear transformation
Suppose $T:V \rightarrow W$ is a linear transformation, where V and W are finite dimensional inner product spaces. Prove that $\text{range } T^{*}=(\text{null } T)^{\perp}$.
I can prove it o... | 5 | [
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Im having issues with integrals
May 15th 2013, 03:55 PM #1
Newbie
Joined
Nov 2012
From
Alberta
Posts
19
Im having issues with integrals
Ok, in calculus right now we are working on integrals. I cannot figure out how to do these word questions with velocity and acceleration in them. Can someone please ... | 4 | [
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Objective functions, region of feasible solutions
April 22nd 2007, 01:55 PM #1
Newbie
Joined
Apr 2007
Posts
3
Objective functions, region of feasible solutions
Hi this is my first time here and was searching on the web (google) for some math help. My math teacher is giving us a test later this week and g... | 4 | [
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inverse matrices
October 12th 2006, 12:23 PM #1
Newbie
Joined
Oct 2006
From
Madrid
Posts
7
How would I prove the inverse of this matrice is as stated
1 1 1
1 2 3 is inverse of
1 3 6
3-3 1
-3 5-2
1-2 1
with working out if possible
Show that the product is equal to t... | 5 | [
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Strong and Weak Convergence for Asymptotically Almost Negatively Associated Random Variables
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 235012, 7 pages
http://dx.doi.org/10.1155/2013/235012
Research Article
Strong and Weak Convergence for Asymptotically Almost Negatively Associated Random ... | 5 | [
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Parallel Methods and Higher Dimensional NLS Equations
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 497439, 9 pages
http://dx.doi.org/10.1155/2013/497439
Research Article
Parallel Methods and Higher Dimensional NLS Equations
^1Department of Mathematics, College of Science, King Abdulaziz University, P... | 5 | [
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Generalized Lorentz Spaces and Applications
Journal of Function Spaces and Applications
Volume 2013 (2013), Article ID 302941, 14 pages
http://dx.doi.org/10.1155/2013/302941
Research Article
Generalized Lorentz Spaces and Applications
Department of Mathematics, College of Sciences, Taibah University, P.O. B 30002, A... | 4 | [
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