content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
2 Quadratic Reciprocity Proofs
June 19th 2011, 02:19 PM #1
Newbie
Joined
Apr 2009
Posts
6
Quadratic Reciprocity Proof (working now)
Hi all, messed up using Latex at first. Okay, got two problems on quadratic reciprocity. I've worked up something of a proof for each, but I feel very uncertain. Thought may... | 5 | [
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0.0142822265625,
0.099609375,
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0.025634765625,
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-0.... | 28,900 | 28900 | |
Probability
QuickMBA / Statistics / Probability
Probability
Three Different Concepts of Probability
The classical interpretation of probability is a theoretical probability based on the physics of the experiment, but does no... | 4 | [
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... | 28,901 | 28901 | |
Integrals aren't real...
April 28th 2009, 03:23 PM #1
Member
Joined
Dec 2008
Posts
228
Integrals aren't real...
Or are they?
Guys, find the antiderivative of {1/2y dy. There are... two antiderivatives? Those are (1/2)ln(abs(2y)) + C and (1/2)ln(abs(y)) + C. Confused? So am I.
Try solving the ... | 5 | [
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ps-leap year
Author Message
TAGS:
00:00
B
C
D
christoph
... | 4 | [
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2nd order ODE with a catch
June 15th 2011, 03:11 PM #1
Member
Joined
Aug 2010
Posts
138
2nd order ODE with a catch
I have an odd ODE question that I could use a hand with...
----------------
$y'' - y' - 2y = 0$
$y(0) = a$
$y'(0) = 2$
Find "a" so that the solution approaches 0 as ... | 4 | [
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SAT Help
January 27th 2007, 07:13 AM
Mr_Green
SAT Help
Given, a paper cone for water is 6 cm across at the top and 10 cm high.
If it is filled to half of its height, what percent of it's total volume does it contain?
If it is filled to half of its volume, what is the height of the water?
This was ... | 4 | [
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Need fast help on an integration problem.
November 25th 2007, 10:14 PM
HclBr
Need fast help on an integration problem.
Hi, I need urgent help on this problem
int((e^(8x))*cos(9x))dx
I've tried integration by parts but you end up with a even more complicated integral. Tabular integration doesn't work sin... | 5 | [
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... | 28,906 | 28906 | |
radical equation
Dnt know how to work these out: $\sqrt{\frac{2}{5}x + 3} - \frac{4}{5} = \frac{2}{5}$ $6 + \sqrt{7x+3} = 6$
$<br /> \sqrt{\frac{2}{5}x + 3} - \frac{4}{5} = \frac{2}{5}<br />$ Add $\frac{4}{5}$ to both sides of the equation: $<br /> \sqrt{\frac{2}{5}x + 3} = \frac{6}{5}<br />$ Square both sides of the
... | 4 | [
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Evaluate difference quotient
January 24th 2010, 10:16 PM
windir
Evaluate difference quotient
This is actually from my calculus textbook, but its in the first chapter which is all pre-calculus review. Unfortunately, I never was taught about difference quotients. Do they come up in
calculus alot? Anyway, here'... | 4 | [
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-0.0272216796875... | 28,908 | 28908 | |
Fibonacci numbers
January 5th 2008, 02:53 AM #1
Fibonacci numbers
We define the sequence: $<br /> f_n = \left\{ \begin{gathered}<br /> 0{\text{ if }}n = 0 \hfill \\<br /> 1{\text{ if }}n = 1 \hfill \\<br /> f_{n - 1} + f_{n - 2} {\text{ if }}n \geqslant 2 \
hfill \\ <br /> \end{gathered} \right.<br />$
P... | 5 | [
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Rectangles Gepmetry
Three congruent rectangles are placed to form a larger rectangle as shown with an area of 1350cm^2 Find the area of a square that has the same perimeter as the larger rectangle?
let's say the larger sides of the small rectangles are the bases of the small rectangles, we'll call the bases $b_1$ let'... | 4 | [
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On the Deformation Theory of Structure Constants for Associative Algebras
Advances in Mathematical Physics
Volume 2010 (2010), Article ID 389091, 21 pages
http://dx.doi.org/10.1155/2010/389091
Research Article
On the Deformation Theory of Structure Constants for Associative Algebras
Dipartimento di Fisica, Universit... | 4 | [
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A weaker form of Zariski's connectedness principle
up vote 2 down vote favorite
1
Let $A$ be a complete regular local noetherian ring of dimension $d>1$ and $B$ an $A$-algebra, finite and free as $A$-module. Assume moreover that there exists an open subset $U$ of $\textrm{Spec}\
A$ of primes of height $d-1$ such that ... | 5 | [
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Poisson Problem
January 6th 2009, 11:16 PM
zorro
Poisson Problem
If the number of accidents occuring in an industrial plant during aa day is given by a Poisson random variable with parameter 3.
Find
i) probability that no accident occurs on a day
ii)the expected number of accidents per day.
January ... | 5 | [
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-0... | 28,913 | 28913 | |
Math Help
July 30th 2005, 12:14 AM #1
Junior Member
Joined
May 2005
Posts
33
Pendulum
Hi guys, I have no clue to this question. Any help is appreciated. Ty.
The length of a pendulum is 20cm. If the tip of the pendulum swings through an angle of 86 degrees, find :
a) The arc length ABC (the dis... | 4 | [
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Probability -- Check my answer please!
January 9th 2009, 05:54 PM #1
Junior Member
Joined
Nov 2008
Posts
53
Probability -- Check my answer please!
Question:
There are 8 opposite-sex married couples at a party. Two people are chosen at random to win a door prize.
a) What is the probability that ... | 4 | [
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Partial Fraction Decomposition
February 2nd 2011, 11:22 PM
dagbayani481
Partial Fraction Decomposition
Partial Fraction Decomposition of the Following:
$(4x^2-8x+48)/(x^4-8x^3+16x^2)<br />$
I factored out and simplified the denominator which gives me: $x^2(x-4)(x-4)$.
From that point on I write out... | 4 | [
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Help! Conditional Probability-Urn Problem
December 13th 2009, 07:15 PM
Rosalie
Help! Conditional Probability-Urn Problem
The problem is stated as follows:
You have an urn with 12 red balls, 20 green balls, and 13 yellow balls. Suppose 3 balls are drawn without replacement. What is the probability the third ... | 4 | [
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Integration of a square root
January 20th 2010, 02:29 PM #1
Newbie
Joined
Jul 2009
Posts
7
Integration of a square root
While working on finding the arc length of the parametrized curve $g(t)=(logt,2t,t^2)$ where $t$ is in $[1,e]$. i got to an integral that i couldn't manage to integrate. Here is the wor... | 5 | [
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Telescoping Series
June 30th 2008, 05:06 PM
auslmar
Telescoping Series
$a_n = \sum^{\infty}_{n=1}\frac{-1}{2(n+2)(n+3)}$
It is known that limit of the terms is $0$ and that the series converges to $\frac{-1}{6}$.
I have a problem that asks for $c_n$ where $a_n = c_n - c_{n+1}$.
Maybe it is simple,... | 5 | [
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Duality Fixed Point and Zero Point Theorems and Applications
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 391301, 11 pages
http://dx.doi.org/10.1155/2012/391301
Research Article
Duality Fixed Point and Zero Point Theorems and Applications
Department of Mathematics, Tianjin Polytechnic University, Tia... | 5 | [
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the encyclopedic entry of regression analysis
In statistics,
regression analysis
is a collective name for techniques for the modeling and analysis of numerical data consisting of values of a
dependent variable
(response variable) and of one or more
independent variables
(explanatory variables). The dependent vari... | 4 | [
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Tank Problem
February 9th 2009, 04:13 AM
Robert Hall
Tank Problem
A tank has some stochastic inflow of water, a water level and some deterministic outflow for different time steps. What I need is the probability density function for the water level in the tank
at time step t+1, $T_{t+1}(n)$.
The probabi... | 4 | [
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4. Volume of Solid of Revolution
by M. Bourne
A lathe
Many solid objects, especially those made on a lathe, have a circular cross-section and curved sides. In this section, we see how to find the volume of such objects using integration.
Objects made on a lathe ...
Example 1
Consider the area bounded by the str... | 5 | [
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... | 28,923 | 28923 | |
Solving a sequence question simultaneously
July 1st 2010, 10:20 PM
atom360
Solving a sequence question simultaneously
Hi
Question: I have to find the common difference and the first term when T8= 21 and T20= 105.
What I have done is state the rule : a + (n-1)d
Then came up with the equations a= 19... | 4 | [
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the encyclopedic entry of osculating-circle
In differential geometry of curves, the osculating circle of a sufficiently smooth plane curve at a given point on the curve is the circle whose center lies on the inner normal line and whose
curvature is the same as that of the given curve at that point. This circle, which i... | 4 | [
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0.0013351... | 28,925 | 28925 | |
How do I start this problem?
October 16th 2010, 09:58 PM
ZeroVector
How do I start this problem?
What is the velocity vector of a particle traveling to the right
along the hyperbola y = 1/x with constant speed 5cm/s when the
particle's location is (2, 1)?
I'm not sure where to start or what formula(... | 5 | [
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-0.0... | 28,926 | 28926 | |
Calculate acceleration with time and distance?
February 22nd 2010, 04:51 PM #1
Member
Joined
Jun 2009
Posts
86
Calculate acceleration with time and distance?
In the 74s after lift-off, the shuttle Challenger travels 36km. Assuming constant acceleration, calculate the acceleration of the shuttle in m/s^2.... | 4 | [
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... | 28,927 | 28927 | |
Cluster Portfolio Allocation
February 11, 2013
By systematicinvestor
Today, I want to continue with clustering theme and show how the portfolio weights are determined in the Cluster Portfolio Allocation method. One example of the Cluster Portfolio Allocation method is
Cluster Risk Parity (Varadi, Kapler, 2012).
The... | 4 | [
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-0.01031494140625,
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0.04443359375,
0.0203857421875,
0.01226806640625,
0.00141143798828125,
-0.01275634765625,
-0.0634765625,
-0.0242919921875,
0.01251220703125,
-0.072265625,
-0.010009765625,
-0.045654296875,
-0.08984375,
-0.033447265625,
-0.03784179687... | 28,928 | 28928 | |
Find Rectangle
July 13th 2012, 06:16 AM
daveywavey
Find Rectangle
I need to enclose any given rectangle with another rectangle.
The enclosing rectangle must be of a specific ratio - eg width is twice its height for example. In actual fact the ratio I need for the enclosing rectagle is that the width is 1.62... | 4 | [
-0.000972747802734375,
0.044189453125,
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0.01611328125,
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0.0306396484375,
0.058349609375,
0.007598876953125,
0.0308837890625,
0.0524902... | 28,929 | 28929 | |
Optimization Problem.
March 25th 2013, 03:48 PM
Joyeux
Optimization Problem.
Hey guys, I think I know the procedure, but something about my answer is wrong. Can someone post a solution for this?
A showroom for a car dealership is to be built in the shape of a rectangle with brick on the back and sides, and ... | 4 | [
0.0830078125,
0.12353515625,
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0.043701171875,
0.02734375,
0.0147705078125,
-0.12255859375,
... | 28,930 | 28930 | |
Moment Generating Function question
October 20th 2009, 02:28 PM
statmajor
Moment Generating Function question
Find the moment generating funtion of Yn = Xn/n, where Xn has a gamma distribution with parameters alpha = n, and beta.
$E(e^{tY_n}) = E(e^{t\frac{X_n}{n}})$ I'm stuck here. I know that the MGF of a... | 5 | [
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0.0196533203125,
0.01904296875,
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0.0185546875,
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0.0128173828125,
0.0087890625,
-0.096679687... | 28,931 | 28931 | |
Party Question
January 29th 2008, 12:49 PM #1
Junior Member
Joined
Aug 2007
Posts
30
Party Question
I did this by hand
for n =1, I get 1 way
n=2, 3 ways
n=3, 15 ways.
Any help or advice on how to look at this problem.
The number of ways to arrange 2n people into n named gro... | 5 | [
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0.048095703125,
-0.001152038574... | 28,932 | 28932 | |
Reducing expressions
July 29th 2006, 02:52 PM #1
Junior Member
Joined
Jul 2006
Posts
25
Reducing expressions
Could someone please explain the best way to reduce these expressions?
4x^2
-----
2x^9
-2x-8
-----
x^2+2x-8
And how to solve this
x^2 = 14x
Thanks
... | 4 | [
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0.04931640625,
... | 28,933 | 28933 | |
The effect of multiple samples on SD
May 18th 2010, 04:13 AM #1
Member
Joined
Sep 2007
Posts
81
The effect of multiple samples on SD
Hi all,
This is the question I am looking at...
Imagine you are building a wall from precast concrete blocks. Standard 20 cm Blocks are 19.5 cm high to allow for ... | 5 | [
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0.039306640625,
0.0103759765625,
0... | 28,934 | 28934 | |
On Nonseparated Three-Point Boundary Value Problems for Linear Functional Differential Equations
Abstract and Applied Analysis
Volume 2011 (2011), Article ID 326052, 22 pages
http://dx.doi.org/10.1155/2011/326052
Research Article
On Nonseparated Three-Point Boundary Value Problems for Linear Functional Differential E... | 5 | [
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0.000518798828125,
-0.0... | 28,935 | 28935 | |
Need Help Simplifying a Few Problems! <Imaginary Numbers>
February 13th 2013, 06:32 PM #1
Newbie
Joined
Feb 2013
From
United States
Posts
2
Need Help Simplifying a Few Problems! <Imaginary Numbers>
I tried I got the first one I think but i is equal to the square root of -1 so I'm honestly not too sur... | 4 | [
-0.058837890625,
0.007781982421875,
0.010986328125,
0.08642578125,
-0.01708984375,
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0.04296875,
0.0291748046875,
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0.0703125,
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0.044189453125,
0.140625,
-0.007781982421875,
-0.0203857421875,
-0.01611328125,
-0.006195068... | 28,936 | 28936 | |
Linear Algebra: Vector Space!
January 30th 2009, 08:37 PM
Vedicmaths
Linear Algebra: Vector Space!
Hello,
I need help in this linear Algebra problem...
Prove that W1 = {(a1, a2, a3....a3) E F^n: a1+a2+a3+...+an = 0} is a subspace of F^n, but
W2 = {(a1, a2, a3....a3) E F^n: a1+a2+a3+...+an = 0} is n... | 5 | [
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-0.05615234375,
-0.0230... | 28,937 | 28937 | |
An equation of the line containing the given point and perpendicular to the line
May 12th 2011, 09:28 AM #1
Member
Joined
Dec 2009
Posts
122
An equation of the line containing the given point and perpendicular to the line
I need help with the steps and solving for an equation of the line containing the g... | 4 | [
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True Heading and Ground Speed
By bill duncan
This program is supplied without representation or warranty of any kind. The author and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or
otherwise, of any kind arising from the use of this program material or any... | 5 | [
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0.... | 28,939 | 28939 | |
Hypothesis Testing Question
November 11th 2011, 03:51 PM #1
Newbie
Joined
Nov 2011
Posts
3
Hypothesis Testing Question
Hi,
This is my first post to MHF. I'm taking an introductory stats course at college, and I have a problem from a sample exam that's giving me some difficulty. I was hoping that som... | 5 | [
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0.12890625,
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-0.0250244140625,
0.076171875,
-0.03784... | 28,940 | 28940 | |
Multilinear Singular and Fractional Integral Operators on Weighted Morrey Spaces
Journal of Function Spaces and Applications
Volume 2013 (2013), Article ID 735795, 11 pages
http://dx.doi.org/10.1155/2013/735795
Research Article
Multilinear Singular and Fractional Integral Operators on Weighted Morrey Spaces
^1Colleg... | 5 | [
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0.0186767578125,
0.0... | 28,941 | 28941 | |
a question
October 28th 2006, 12:46 PM #1
Newbie
Joined
Oct 2006
Posts
5
a question
for what values of the parameter m there will be
4 answers in wich can be arranged so the subtraction of each 2 answers
will be permanent
To start you off, this is a biquadratic equation. So:
$x^4 + 6mx^... | 5 | [
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0.1298828125,
-0.040283203125,
-0.039794921875,... | 28,942 | 28942 | |
polar / parametrics question
xy - 2x = 0 Convert the rectangular equation into polar form.
I get... r^2 cosx sinx - 2r cosx = 0 what do i do next, since this answer doesn't match the one in the back fo the book.
We first parametrize it $x=r\cos(\theta)$ and $y=r\sin(\theta)$ Inputting this we get $(r\cos(\theta))(r\s... | 5 | [
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0.00933837890625,
0.14453125,
0.078125,
0.030029296875,
-0.109375,
-0.05981... | 28,943 | 28943 | |
A High-Accuracy MOC/FD Method for Solving Fractional Advection-Diffusion Equations
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 648595, 8 pages
http://dx.doi.org/10.1155/2013/648595
Research Article
A High-Accuracy MOC/FD Method for Solving Fractional Advection-Diffusion Equations
School of Mathemat... | 5 | [
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0.005340576171875,
... | 28,944 | 28944 | |
Asymptotic Behavior of the Stochastic Rayleigh-van der Pol Equations with Jumps
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 432704, 13 pages
http://dx.doi.org/10.1155/2013/432704
Research Article
Asymptotic Behavior of the Stochastic Rayleigh-van der Pol Equations with Jumps
^1School of Mathematical... | 5 | [
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0.0654296875,
-0.07861328125,
-0.... | 28,945 | 28945 | |
Attractors and Finite-Dimensional Behaviour in the 2D Navier-Stokes Equations
ISRN Mathematical Analysis
Volume 2013 (2013), Article ID 291823, 29 pages
http://dx.doi.org/10.1155/2013/291823
Review Article
Attractors and Finite-Dimensional Behaviour in the 2D Navier-Stokes Equations
Mathematics Institute, University... | 4 | [
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... | 28,946 | 28946 | |
Product topology
February 28th 2009, 09:24 PM #1
Newbie
Joined
Jan 2009
Posts
13
Product topology
Let X and Y be the topological spaces, ans assume that A⊂X and B⊂Y. Then the topology on AxB as a subspace of the product XxY is the same as the product topology on AxB, where A has the subspace
topology... | 4 | [
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... | 28,947 | 28947 | |
composite transformation
April 19th 2011, 12:15 AM
vidhi96
composite transformation
I am going through this past papers and I am utterly confused with the question- looked at all the notes and examples but simply can't understand what to do for part (b) Please explain. I have
sucessfully done part (a) and an... | 5 | [
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-0.... | 28,948 | 28948 | |
A Review of Electronic Band Structure of Graphene and Carbon Nanotubes Using Tight Binding
Journal of Nanotechnology
Volume 2011 (2011), Article ID 471241, 6 pages
http://dx.doi.org/10.1155/2011/471241
Review Article
A Review of Electronic Band Structure of Graphene and Carbon Nanotubes Using Tight Binding
School of... | 4 | [
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0.001190185546875,
0... | 28,949 | 28949 | |
arithmetic (race problem)
December 8th 2009, 12:35 PM #1
Member
Joined
Jan 2008
Posts
173
arithmetic (race problem)
In a race over d yards, A would beat B by 20 yards; B would beat C by 10 yards; and A would beat C by 28 yards. What is the value of d ?
First assign variables to the different speeds ... | 4 | [
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0.... | 28,950 | 28950 | |
Easy exponential equation but don't know how to solve properly.
April 2nd 2012, 08:24 AM #1
Newbie
Joined
Apr 2012
From
Eastern Europe
Posts
2
Easy exponential equation but don't know how to solve properly.
Hi,
I have this simple exponential equation:
3^(x+2) + 3^(x-2) = 246
It is easy... | 4 | [
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-0.05712890625,
0.0098876... | 28,951 | 28951 | |
Scholarship review question
May 31st 2010, 11:37 AM
Solaris123
Scholarship review question
Hello, Im trying to get the japanese govenment scholarship, I come from Panama and have basicly taugh myself english. Im having problem understanding the next problem or what they are asking, I
believe that they say th... | 4 | [
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-0.019775390625,
-0.04052734... | 28,952 | 28952 | |
Loan Question
January 18th 2010, 03:44 PM #1
Newbie
Joined
Jan 2010
Posts
3
Loan Question
Hey everyone, im having a bit of trouble remembering how to do these questions from corporate finance
A 29 year old loan requires weekly payments of 125.43 including interest at 24.50% compounded weekly.
a... | 4 | [
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0.0164794921875,
0.004302978515625,
-0.1435546... | 28,953 | 28953 | |
Solution and Stability of a General Mixed Type Cubic and Quartic Functional Equation
Journal of Function Spaces and Applications
Volume 2013 (2013), Article ID 673810, 8 pages
http://dx.doi.org/10.1155/2013/673810
Research Article
Solution and Stability of a General Mixed Type Cubic and Quartic Functional Equation
^... | 5 | [
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-0.01007080078125,
-0.04223... | 28,954 | 28954 | |
Classical Electrostatics shows that growing fields imply Evanescent Matter
2010-Sep-17, 05:51 PM #1
Classical Electrostatics shows that growing fields imply Evanescent Matter
Growing fields imply Evanescent Matter
Helder Velez
Abstract:
The conservation of energy in a field that obeys an inverse sq... | 4 | [
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-0.07910156... | 28,955 | 28955 | |
Manipulating cubic functions: x-intercepts
April 24th 2010, 08:54 AM #1
Newbie
Joined
Apr 2010
Posts
7
Manipulating cubic functions: x-intercepts
Hi,
I'm trying to create a cubic function that has only one x-intercept of -5 and a y-intercept of around 10.
The y-intercept doesn't have to be exact... | 4 | [
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0.023681640625,
0.09375,
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0.055908203125,
0.07470703125,
0.1083984375,
-0.030517578125,
0.022705078125,
-... | 28,956 | 28956 | |
Quick mathematical induction question
November 30th 2010, 10:43 PM #1
Junior Member
Joined
May 2010
Posts
27
Quick mathematical induction question
The problem
n
Σi^2 = n(n + 1)(2n + 1)/6
i=1
The base case is correct. Gona get to the meat of the problem
P(k) -------> P(k +1)
1^... | 4 | [
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0.0296630859375,
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0.... | 28,957 | 28957 | |
Interval Arithmetic for Nonlinear Problem Solving
International Journal of Engineering Mathematics
Volume 2013 (2013), Article ID 768474, 11 pages
http://dx.doi.org/10.1155/2013/768474
Research Article
Interval Arithmetic for Nonlinear Problem Solving
Department of Materials Science and Engineering, Institute of Tec... | 5 | [
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-0.04931640625,
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Improving the S-Shape Solar Radiation Estimation Method for Supporting Crop Models
The Scientific World Journal
VolumeΒ 2012Β (2012), Article IDΒ 768530, 10 pages
http://dx.doi.org/10.1100/2012/768530
Research Article
Improving the S-Shape Solar Radiation Estimation Method for Supporting Crop Models
Crop Modeling re... | 4 | [
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-0.01586914062... | 28,959 | 28959 | |
Nonlinear Model Predictive Control with Terminal Invariant Manifolds for Stabilization of Underactuated Surface Vessel
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 846389, 8 pages
http://dx.doi.org/10.1155/2013/846389
Research Article
Nonlinear Model Predictive Control with Terminal Invariant Manifold... | 4 | [
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... | 28,960 | 28960 | |
Find the equation and comman chord of a circle
May 3rd 2009, 10:31 PM
zorro
Find the equation and comman chord of a circle
Find the equation and length of common chord of the circle
$<br /> 2x^2 + 2y^2 + 7x -5y + 2 = 0<br />$ and $<br /> x^2 + y^2 - 4x + 8y - 18 =0<br />$
May 5th 2009, 10:37 AM
VonNemo19
... | 4 | [
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0.038818359375,
-0.0220947265625,
0.09716796875,
-0.0703125,
-0.072265... | 28,961 | 28961 | |
Le Monde puzzle (rainy Sunday!)
October 20, 2012
By xi'an
On October 14, the weekend edition of Le Monde had the following puzzle: consider four boxes that contain all integers between 1 and 9999, in such a way that for any N, N, 2N, 3N, and 4N are in four
different boxes. If 1,2,3 and 4 are in boxes labelled 1,2,3 ... | 5 | [
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-0.0825195312... | 28,962 | 28962 | |
Population problem..desperately need help!
August 20th 2008, 03:16 AM #1
Newbie
Joined
Aug 2008
Posts
17
Population problem..desperately need help!
The population of bacteria in a culture grows at a rate proportional to the number of bacteria present at any time. After 3 hours it is observed that there a... | 5 | [
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A few pre-calc guidance needed
January 9th 2008, 04:07 PM #1
Newbie
Joined
Jan 2008
Posts
6
A few pre-calc guidance needed
Hi again. I have a few problems which I feel like I'm right at the finish line but I just can't cross...They are the following:
FIRSTLY
Let a and b be real numbers.
f(... | 5 | [
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0.06982421875,
-0.140625,
0.012268066... | 28,964 | 28964 | |
Mixing problem
May 1st 2009, 06:24 AM #1
Junior Member
Joined
Mar 2009
Posts
52
Mixing problem
Q) Two containers of equal capacity are full of mixture of oil and water.In the first the ratio of oil to water is 4:7 and in the second it is 7:11. Now both the mixture are mixed in a big
container.what is... | 4 | [
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0.0092163085937... | 28,965 | 28965 | |
calculus- plz help..
May 3rd 2006, 01:50 AM #1
Member
Joined
Sep 2005
Posts
136
calculus- plz help..
The weight (force due to gravity) of an object of mass m and altitude x miles above the surface of the earth is w(x) = (mgR^2)/(R+x)^2, where R is the radius of the earth and g is the
acceleration due... | 4 | [
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0.01647949218... | 28,966 | 28966 | |
A Comparison between Two Force-Position Controllers with Gravity Compensation Simulated on a Humanoid Arm
Journal of Robotics
Volume 2013 (2013), Article ID 256364, 14 pages
http://dx.doi.org/10.1155/2013/256364
Research Article
A Comparison between Two Force-Position Controllers with Gravity Compensation Simulated o... | 4 | [
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0.06298828125,
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0.0198974609375,
0.07080078125,
... | 28,967 | 28967 | |
Parking Pricing and Model Split under Uncertainty
Discrete Dynamics in Nature and Society
Volume 2014 (2014), Article ID 679719, 8 pages
http://dx.doi.org/10.1155/2014/679719
Research Article
Parking Pricing and Model Split under Uncertainty
^1State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong... | 4 | [
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0.025390625,
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Existence and Multiplicity of Positive Solutions for a System of Fourth-Order Boundary Value Problems
Chinese Journal of Mathematics
Volume 2014 (2014), Article ID 717290, 11 pages
http://dx.doi.org/10.1155/2014/717290
Research Article
Existence and Multiplicity of Positive Solutions for a System of Fourth-Order Boun... | 5 | [
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0.0107421875,
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-0.038818359... | 28,969 | 28969 | |
Simple Linear Regression Equation Part 1
« Income statement - base lines and ratios | Main | CMA 1 exam - passed! »
Simple Linear Regression Equation Part 1
Next Part
Let us consider the exampl... | 5 | [
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0.0025634765... | 28,970 | 28970 | |
Solution of equation of form ln(a+bx) = cx
April 17th 2012, 08:52 AM #1
Newbie
Joined
Apr 2012
From
France
Posts
5
Solution of equation of form ln(a+bx) = cx
Hello,
I am having an exponential equation that depends on 3 different variables, which are included in the constants a, b and c....
s... | 5 | [
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0.0966796875,
-0.1279296875,
0.066... | 28,971 | 28971 | |
More Optimization Problem . . .
April 9th 2007, 06:39 PM #1
Junior Member
Joined
Mar 2007
Posts
56
More Optimization Problem . . .
A painting in an art gallery has height h and is hung so that its lower edge is a distance d above the eye of an observer. How far from the wall should the observer stand to ... | 5 | [
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0.044921875,
0.03173828125,... | 28,972 | 28972 | |
Finding mass from density/volume
February 26th 2010, 07:38 PM #1
Junior Member
Joined
Sep 2009
Posts
65
Finding mass from density/volume
The shed is filled with sawdust whose density (mass/unit volume) at any point is proportional to the distance of that point from the floor. The constant of proportional... | 5 | [
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0.00970458984375,
0.0255126953125,
0.058... | 28,973 | 28973 | |
Some Logarithm Questions
December 19th 2006, 06:22 PM
SportfreundeKeaneKent
Some Logarithm Questions
Here are some log questions that I haven't been able to solve. The problem that I'm having is that the base is different in some of them which is throwing me off.
By the way, the first question has a little t... | 5 | [
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-0.166015625,
0.0125... | 28,974 | 28974 | |
Logic & Propositions & Proofs
September 6th 2008, 10:50 AM #1
Junior Member
Joined
Aug 2008
Posts
33
Logic & Propositions & Proofs
Hi, can anyone help me show how to prove this. I know it is common sense, but I don't know how to express on paper how to prove it.
A∩∅=∅
Thanks!
Well, if $A=\... | 5 | [
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... | 28,975 | 28975 | |
Balancing Treatment Allocation over Continuous Covariates: A New Imbalance Measure for Minimization
Journal of Probability and Statistics
Volume 2012 (2012), Article ID 842369, 13 pages
http://dx.doi.org/10.1155/2012/842369
Research Article
Balancing Treatment Allocation over Continuous Covariates: A New Imbalance Me... | 4 | [
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... | 28,976 | 28976 | |
Max value of trigonometric function
Decide the x-value which is Max value of the function y=4sin(x)+3cos(x) in 0<=x<=2¶ Thanks for helping.
Endpoints (0,3) and (2,2.3887) 1st derivative $\displaystyle y'=4\cos{x}-3\sin{x}=0\Rightarrow \frac{4}{3}=\tan{x}$ Solve the equation for rel. maxes between [0,2] if there are an... | 4 | [
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0.06884765625,
-0.... | 28,977 | 28977 | |
Perturbation in PDE
July 15th 2012, 11:22 AM #1
Newbie
Joined
Jul 2012
From
New York
Posts
1
Perturbation in PDE
Can anyone please hep me solve this problem?
I think it's ment to be solved by Lindstedt method:
Consider the PDE u_tt-u_xx+k^2u+eps*u^3=0.
a) Assume that k>0. Look for a so... | 4 | [
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-0.04101562... | 28,978 | 28978 | |
Solving a Quadratic Equation by Modifying the Coefficient
October 27th 2012, 05:34 AM #1
Newbie
Joined
Nov 2008
Posts
16
Solving a Quadratic Equation by Modifying the Coefficient
I'm working my way through Mathematics for the Nonmathematician and in the section on quadratic equations the author introduce... | 4 | [
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0.048583984375... | 28,979 | 28979 | |
Connected Subset
July 26th 2008, 04:35 PM #1
Member
Joined
Jul 2008
Posts
119
Connected Subset
Let A be a connected subset of $R^3$. Suppose that the points (0,0,1) and (4,3,0) are in A.
a. Prove that there is a point in A whose second component is 2.
b. Prove that there is a point in A whose no... | 5 | [
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-0.1... | 28,980 | 28980 | |
Series convergence question
January 27th 2011, 01:40 AM #1
Senior Member
Joined
Apr 2010
Posts
487
Series convergence question
The question:
Determine if the following alternating series converges. Is it absolutely convergent?
$\sum\limits_{k = 3}^\infty \frac{(-1)^k}{ln(k)}$
My attempt:
... | 5 | [
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-0.006622314453125,
... | 28,981 | 28981 | |
[SOLVED] 1-to-1 Correspondence Proof
March 7th 2009, 01:04 PM #1
Newbie
Joined
Mar 2009
Posts
16
[SOLVED] 1-to-1 Correspondence Proof
Let g: A -> and f: B -> both be 1-to-1 correspondences. Prove that f o g : A->C is a 1-to-1 correspondence.
I'm studying for exam next week and trying to do a proof f... | 4 | [
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Analysis of an Ecoepidemiological Model with Prey Refuges
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 371685, 16 pages
http://dx.doi.org/10.1155/2012/371685
Research Article
Analysis of an Ecoepidemiological Model with Prey Refuges
^1School of Mathematics and Computer Science, Northwest University ... | 5 | [
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-0.0390625... | 28,983 | 28983 | |
Problem with inequalities
July 19th 2007, 03:35 AM #1
Newbie
Joined
Jul 2007
Posts
8
Problem with inequalities
{}'s represent absolute value bars.
{2x+5} - 7 > -6
What the do I do wit the -7? How is the problem solved?
Last edited by ThePerfectHacker; July 24th 2007 at 04:16 PM.
Follo... | 4 | [
-0.0654296875,
-0.0023345947265625,
0.10693359375,
-0.0233154296875,
0.0035247802734375,
0.000164031982421875,
-0.00592041015625,
0.061767578125,
-0.061767578125,
0.060791015625,
-0.014404296875,
-0.052001953125,
0.09228515625,
0.042724609375,
-0.0303955078125,
0.06005859375,
0.01397... | 28,984 | 28984 | |
Numbers in array and its exponents ( congruence operation )
November 20th 2009, 12:21 PM
jmarchetti
Numbers in array and its exponents ( congruence operation )
Introduction:
=============
Another way to see congruences is to put the numbers in an array of width n.
In the following example n is 5:
... | 4 | [
-0.058837890625,
0.005401611328125,
-0.0576171875,
-0.036865234375,
0.00518798828125,
-0.08203125,
0.03564453125,
0.0201416015625,
0.0244140625,
-0.05322265625,
0.01556396484375,
0.06640625,
0.011474609375,
0.00604248046875,
-0.041015625,
-0.080078125,
-0.115234375,
0.033447265625,... | 28,985 | 28985 | |
Spatiotemporal Hotspots Analysis for Exploring the Evolution of Diseases: An Application to Oto-Laryngopharyngeal Diseases
Advances in Fuzzy Systems
Volume 2013 (2013), Article ID 385974, 7 pages
http://dx.doi.org/10.1155/2013/385974
Research Article
Spatiotemporal Hotspots Analysis for Exploring the Evolution of Dis... | 4 | [
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0.033203125,
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0.03759765625,
0.032470703125,
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-0.0255126953125,
-0.02685546875,
-0.... | 28,986 | 28986 | |
A Bayesian QTL linkage analysis of the common dataset from the 12
• We are sorry, but NCBI web applications do not support your browser and may not function properly.
More information
•
BMC Proc. 2009; 3(Suppl 1): S4.
Published online Feb 23, 2009.
A Bayesian QTL linkage analysis of the common dataset from... | 4 | [
-0.0810546875,
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... | 28,987 | 28987 | |
Having sign problem with algebraic fractions
January 26th 2013, 05:48 PM #1
Junior Member
Joined
Jan 2013
From
Montreal
Posts
65
Thanks
1
Having sign problem with algebraic fractions
Hi,
I'm having a problem with an algebraic fractions equation. It goes:
5/3(v-1) + (3v-1)/(1-v)(1+v) + 1... | 4 | [
-0.0703125,
0.0169677734375,
0.044189453125,
0.0146484375,
0.051025390625,
-0.03857421875,
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-0.049560546875,
0.01708984375,
0.004241943359375,
0.05615234375,
-0.06298828125,
-0.0203857421875,
0.09814453125,
-0.0262451171875,
-0.0181884765625,
-0.0306396484375,
0.0137... | 28,988 | 28988 | |
Patent US4959832 - Parallel pseudorandom pattern generator with varying phase shift
BACKGROUND OF THE INVENTION
The present invention is generally directed to pseudorandom pattern generators using linear feedback shift registers. More particularly, the present invention is directed to means and a method for
varying th... | 4 | [
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-0.01409912109375,
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-0.0234375,
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0.0045166015625,
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-0.0157470703125,
0.01202392578125,
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0.0244140625,
-0.0634765625,
0.00927734375,
-0.023681640625,
-0.10302734375,
... | 28,989 | 28989 | |
Genetics and Molecular Biology
Services on Demand
Article
Indicators
Related links
Share
Print version ISSN 1415-4757
Genet. Mol. Biol. vol.32 no.2 São Paulo 2009
http://dx.doi.org/10.1590/S1415-47572009000200001
... | 4 | [
0.038818359375,
-0.0250244140625,
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0.000957489013671875,
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0.10546875,
-0.10009765625,
0.01416015625,
-0.10791015625,
0.0054626... | 28,990 | 28990 | |
Patente US7123584 - Digital subscriber line user capacity estimation
RELATED APPLICATIONS
The present application claims priority from and is a continuation in part of patent application Ser. No. 10/766,314 filed on Jan. 28, 2004.
FIELD OF THE DISCLOSURE
The present disclosure generally relates to data communication... | 4 | [
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0.08349609375,
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0.0712890625,
-0.10888671... | 28,991 | 28991 | |
do you know the properties of summation
if you multiply two summation notation ex. (summation (x)) *(summation(y)) do you get (sumation (xy)) ??
no. it = ac + cd + ad + bd
So try : $\left(\sum_{i=1}^2 a_i \right) \times \left(\sum_{i=1}^2 b_i \right)=(a_1+a_2) \times (b_1+b_2)$ $\sum_{i=1}^2 a_i b_i=a_1b_1+a_2b_2$ is... | 4 | [
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0.1640625,
0.00048828125,
0.1... | 28,992 | 28992 | |
Area between two circles
November 16th 2013, 06:36 PM #1
Junior Member
Joined
Oct 2012
From
London
Posts
53
Area between two circles
Find the area of the region between the circles x^2 + y^2 = 4 and x^2 + y^2 = 4x
My attempt at the solution:
I found the points of intersection are at (1,-sqrt... | 5 | [
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0.0208740234375,
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0.03271484375,
0.032470703125,
0.06103515625,
0.01495361328125... | 28,993 | 28993 | |
Hilbert System Proof. ( p /\ q ) -> (q /\ p )
October 7th 2012, 03:59 AM #1
Newbie
Joined
Oct 2012
From
Denmark
Posts
2
Hilbert System Proof. ( p /\ q ) -> (q /\ p )
Hey guys, as the title describes i need some help for this proof!
I have to use these operations and i "just" need to find the ri... | 4 | [
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0.04345703125,
-0.0101318359375,
-0.00762939453125,
0.036376953125,
-0.11083984375,
0.0031890869... | 28,994 | 28994 | |
ad
Break-Even and Target Profit Analysis
Super Sales Company is the exclusive distributor for a revolutionary bookbag. The product sells for $60 per unit and has a CM ratio of 40%. The company's fixedexpenses are $360,000 per year. The
company plans to sell 17,000 bookbags this year.
1. What are the variable expens... | 4 | [
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0.04248046875,
-0.0849609375,
-0.0142822265625,
-0.041748046875,
0.00897216796875,
-0.00102996826171875,
0.07177734375,
-0.05810546875,
0.06982421875,
0.054931640625,
-0.059814453125,
0.038818359375,
0.021240234375,
0.019287109375,
0.01361083984375,
-0.04833984375,
... | 28,995 | 28995 | |
Determinants Problem
July 9th 2009, 03:29 AM #1
Hey guys,
I got into quite a predicament lately when I tried to solve this problem. We need to find the value for x such that the determinants below are equal. I tried to expand then equate but got a
strange equation, that I couldn't solve. I tried row opera... | 4 | [
-0.076171875,
-0.03466796875,
0.057373046875,
-0.08984375,
0.0274658203125,
-0.010009765625,
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-0.06494140625,
-0.023193359375,
0.046142578125,
0.0927734375,
-0.01409912109375,
0.0233154296875,
-0.0205078125,
-0.000013947486877441406,
0.046142578125,
-0.0185546875,
-0... | 28,996 | 28996 | |
Factoring Complex Polynomials
September 3rd 2009, 06:24 AM #1
Junior Member
Joined
Jan 2009
Posts
69
Factoring Complex Polynomials
Hi
I am asked to show all the seventh roots of -128 in polar form, no probs. But I am then asked
Factorise the polynomial $x^7+128$ into polynomial factors with
... | 4 | [
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0.02978515625,
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0.0859375,
0.012451171875,
-0.052978515625,
-0.078125,
-0.00053024... | 28,997 | 28997 | |
Many students tend to memorize different mathematical equations but
seldom understand their actual applications outside the cl
Investigations in Baseball Construction
Objectives:
1. Students will apply the Pythagorean Theorem in a practi... | 4 | [
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... | 28,998 | 28998 | |
Generating Bézier curve control points for regular stars
A more complete illustration suitable for printing is here. Illustrations and text kopyleft 2006 Chris Korda, all rites reversed.
Background: A star is a regular polygon, but with an extra vertex between each normal vertex. The normal vertices are "even", while... | 4 | [
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... | 28,999 | 28999 |