content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Group Theory
September 4th 2008, 04:15 PM #1
Junior Member
Joined
Feb 2007
Posts
70
Group Theory
Suppose $a$ and $b$ belong to a group, $a$ has odd order, and $aba^{-1} = b^{-1}$. Show that $b^2 = e$.
I have a feeling I'm missing something obvious, but I can't for the life of me figure out what $a$ ... | 5 | [
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a modular linear equation
May 22nd 2008, 02:53 AM
octagonreturns
a modular linear equation
Hello,
I have to solve this modular linear equation (in paper not using programming)
18x = 81 (mod171)
My thought is we begin using the extended euclidean algorithm (ax+by=gcd(a,b) calculating : (div a/b), t... | 5 | [
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Help on solving first-order NONhomogeneous PDE
September 25th 2011, 07:37 PM
minorinmath6251
Help on solving first-order NONhomogeneous PDE
Hello everybody. I'm trying to solve this first-order NONhomogenous PDE. But because my awfully bad textbook only gave examples on how to solve homogeneous PDEs, I'm not sur... | 5 | [
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[SOLVED] Square Problem
Last edited by Sodapop; May 7th 2009 at 05:47 PM.
Yes, I can understand this part. Please help me with the other steps to arrive at the final answer.
Hi Consider triangle BPE. PR is one height of this triangle. The area of BPE is $A(BPE) = \frac12\:PR \times BE$ The same for triangle BPC : $A(... | 4 | [
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Amount of work done (integration)
February 13th 2008, 04:30 AM #1
Newbie
Joined
Sep 2007
Posts
11
Amount of work done (integration)
A cable that weighs 2ft/lb is used to lift 800lb of coal up a mine shaft 500ft deep. Find the work done. I can't figure out where to start. I understand that W=Fd.
I al... | 5 | [
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Homework Help
Posted by Anonymous on Tuesday, April 27, 2010 at 10:23pm.
*simplify by combining like terms, if possible. then, remove the GCF and factor fully.
2x^2-21x+36+x^2
=3x^2-21x+36
...i'm not sure what to do after that, could you help and show the steps please
• math - Ana, Tuesday, April 27, 2010 at 11:... | 4 | [
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Common Coupled Fixed-Point Theorems in Generalized Fuzzy Metric Spaces
Advances in Fuzzy Systems
Volume 2011 (2011), Article ID 986748, 6 pages
http://dx.doi.org/10.1155/2011/986748
Research Article
Common Coupled Fixed-Point Theorems in Generalized Fuzzy Metric Spaces
^1Department of Mathematics, Acharya Nagarjuna ... | 5 | [
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Dynamical Behaviour of a Tumor-Immune System with Chemotherapy and Optimal Control
Journal of Nonlinear Dynamics
Volume 2013 (2013), Article ID 608598, 13 pages
http://dx.doi.org/10.1155/2013/608598
Research Article
Dynamical Behaviour of a Tumor-Immune System with Chemotherapy and Optimal Control
Department of Math... | 4 | [
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Homework Help
Posted by Lisana on Sunday, October 9, 2011 at 6:15pm.
Jessica can jog to work in 4/5 of an hour. When she rides her bike, it takes her 3/10 of an hour. If she rides 10 miles per hour faster than she jogs, how far away is her work?
• Math - Steve, Monday, October 10, 2011 at 5:46am
She bikes at s... | 4 | [
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Calculate Derivative? Square root?
July 20th 2009, 06:30 PM
Brazuca
Calculate Derivative? Square root?
http://img43.imageshack.us/img43/6099/squarej.jpg
I circled the part I didn't understand when solving this equation.
When I did it I turned U into 6^(1/2) and DU into 3X^(-1/2)
So I understand wher... | 5 | [
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the encyclopedic entry of Characteristic (algebra)
In
mathematics
, the
characteristic
of a
ring R
, often denoted char(
R
), is defined to be the smallest number of times one must add the ring's multiplicative
identity element
(1) to itself to get the
additive identity
element (0); the ring is said to have... | 4 | [
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[SOLVED] Integration by substitution
Use the substitution The problem before this was using the same substitution, but to evaluate
Observe that $u={\color{blue}1-x^2}\implies {\color{red}x^2}=1-u$, then $\,du={\color{green}-2x\,dx}$. The limits of integration change as well: $u(0)=1$ and $u(1)=0$ So $\int_0^1 x^3\sqrt... | 5 | [
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Help solving a 1st order ODE
November 25th 2013, 04:26 AM
jguzman
Help solving a 1st order ODE
I'm trying to solve analytically the following simple first order differential equation:
${dx \over dt} = \frac{(1-x)}{\tau} - Ux$
for $\tau$ and $U$ being constants. In principle, this differential equation ... | 5 | [
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Kalman filtering application
February 20th 2009, 01:21 AM
atlove
Kalman filtering application
Dear all
I am doing a project which is about energy comsumption estimation.
First, I need to read all parameters available in different time instant, i.e. x1(ti), x2(ti), x3(ti),... x6(ti) etc. ti means time at... | 4 | [
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the encyclopedic entry of Archimedes's use of infinitesimals
Archimedes' use of infinitesimals
is the first attested explicit use. The work with
infinitesimals
of the ancient Greek mathematician, physicist, and engineer from
Syracuse
is found in the celebrated
Archimedes Palimpsest
. The palimpsest includes Arch... | 5 | [
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Stability of Nonlinear Stochastic Discrete-Time Systems
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 356746, 8 pages
http://dx.doi.org/10.1155/2013/356746
Research Article
Stability of Nonlinear Stochastic Discrete-Time Systems
^1College of Information Science & Engineering, Shandong University of S... | 5 | [
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Number of Patients per Cohort and Sample Size Considerations Using Dose Escalation with Overdose Control
Journal of Probability and Statistics
Volume 2012 (2012), Article ID 692725, 16 pages
http://dx.doi.org/10.1155/2012/692725
Research Article
Number of Patients per Cohort and Sample Size Considerations Using Dose ... | 4 | [
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the encyclopedic entry of Hyperbolic equilibrium point
In
mathematics
, especially in the study of
dynamical system
, a
hyperbolic equilibrium point
or
hyperbolic fixed point
is a special type of
fixed point
.
The Hartman-Grobman theorem states that the orbit structure of a dynamical system in the neighbourh... | 4 | [
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How to solve mean, median, mode problem
How to solve mean, median, mode problem
The problem states: On a daily homework assignment the student has earned the maximum score of 10 on 15 of 40 assignments. The mode of the 40 scores is 7, and the median is 9. What is the least
arithmetic mean could be? Do I start with ... | 4 | [
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Asymptotic Bounds for the Time-Periodic Solutions to the Singularly Perturbed Ordinary Differential Equations
The Scientific World Journal
Volume 2013 (2013), Article ID 301609, 4 pages
http://dx.doi.org/10.1155/2013/301609
Research Article
Asymptotic Bounds for the Time-Periodic Solutions to the Singularly Perturbed... | 5 | [
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using matrix-differential eqns-help exam quite soon
June 12th 2013, 03:54 PM #1
Member
Joined
May 2013
From
england
Posts
100
using matrix-differential eqns-help exam quite soon
Hello,
I am really not sure about this one .Please help.thanks
find the particular solution to the system of differ... | 5 | [
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Two-Channel Quadrature Mirror Filter Bank: An Overview
ISRN Signal Processing
Volume 2013 (2013), Article ID 815619, 10 pages
http://dx.doi.org/10.1155/2013/815619
Review Article
Two-Channel Quadrature Mirror Filter Bank: An Overview
Department of Electronics and Communication Engineering, National Institute of Tech... | 4 | [
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A Unified Framework for GPS Code and Carrier-Phase Multipath Mitigation Using Support Vector Regression
Advances in Artificial Neural Systems
Volume 2013 (2013), Article ID 240564, 14 pages
http://dx.doi.org/10.1155/2013/240564
Research Article
A Unified Framework for GPS Code and Carrier-Phase Multipath Mitigation U... | 4 | [
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An Implicit Iteration Process for Common Fixed Points of Two Infinite Families of Asymptotically Nonexpansive Mappings in Banach Spaces
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 602582, 6 pages
http://dx.doi.org/10.1155/2013/602582
Research Article
An Implicit Iteration Process for Common Fixed Po... | 5 | [
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A Hybrid Forecasting Model Based on Bivariate Division and a Backpropagation Artificial Neural Network Optimized by Chaos Particle Swarm Optimization for Day-Ahead Electricity Price
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 249208, 31 pages
http://dx.doi.org/10.1155/2014/249208
Research Article
A H... | 4 | [
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Antiperiodic Solutions for a Generalized High-Order
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 454619, 12 pages
http://dx.doi.org/10.1155/2013/454619
Research Article
Antiperiodic Solutions for a Generalized High-Order -Laplacian Neutral Differential System with Delays in the Critical Case
^1Schoo... | 5 | [
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On Extremal Ranks and Least Squares Solutions Subject to a Rank Restriction
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 457298, 7 pages
http://dx.doi.org/10.1155/2014/457298
Research Article
On Extremal Ranks and Least Squares Solutions Subject to a Rank Restriction
Department of Mathematics and Com... | 5 | [
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Sketching regions in complex plane
November 9th 2010, 04:31 AM #1
Member
Joined
Apr 2010
Posts
156
Sketching regions in complex plane
Draw a diagram showing the region ${z \epsilon \mathbb{C} : Re(\frac{1}{z} - 2) \leq 1}$ ?
Attempt:
$Re(\frac{1}{z} - 2) \leq 1$
$Re(\frac{1 - 2z}{z}) \leq ... | 4 | [
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0.045166015625,
-0.041015625,
-0.049560546875,
0.031494140625,
-0.... | 26,727 | 26727 | |
Help with basic algebra question
August 18th 2013, 03:50 PM
jabackf
Help with basic algebra question
So I've been out of school for quiet a few years. I've forgotten a lot of what I've learned about algebra but I've been studying trying to pick it back up. I have a test coming up for a job that
I've applied ... | 4 | [
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I need help once more
Make x the subject of the formula L=2K[1 + ln(x/a)]
$L\,=\,2K[1\,+\,ln(\frac{x}{a})]$ Divide by 2K:.. $\frac{L}{2K}\,=\,1\,+\,ln(\frac{x}{a})$ Subtract 1:.. $\frac{L}{2K}\,-\,1\,=\,ln(\frac{x}{a})$ Raise both to a base of $e$:.. $e^{\frac{L}{2K}\,-
\,1}\,=\,\frac{x}{a}$ Cross multiply:.. $\boxed{... | 4 | [
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0.09423828125,
-0.08544... | 26,729 | 26729 | |
solution set of the logarithm inequality
December 22nd 2012, 05:20 AM #1
solution set of the logarithm inequality
Solution set: Log base 1/3 (x^2+ 4x +3) < = -1
attempt:
x^2 + 4x + 3 <= (1/3)^-1
x^2 + 4x + 3 < = 3
x^2 + 4x < = 0
x ( x + 4) < = 0
x < = 0, x < = -4
i wonder why from t... | 4 | [
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0.003662109375... | 26,730 | 26730 | |
Lines and distance Question
October 31st 2008, 09:37 AM #1
Member
Joined
Aug 2007
Posts
144
Lines and distance Question
The question is;
Find the equations of the lines which pass through the point $(1,2)$ and have perpendicular distance of $1$ from the origin.
The question says "lines" and "eq... | 4 | [
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0.08056640625,
-0.072265625,
-0.134765625... | 26,731 | 26731 | |
-Ideals and Int Soft c-
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 125614, 15 pages
http://dx.doi.org/10.1155/2012/125614
Research Article
Closed Int Soft -Ideals and Int Soft c--Ideals
^1Department of Mathematics Education (and RINS), Gyeongsang National University, Chinju 660-701, Republic of Ko... | 5 | [
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0.032958984375,
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0.0228271484375,
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0.003... | 26,732 | 26732 | |
the encyclopedic entry of angular momentum
In physics, the angular momentum of a particle about an origin is a vector quantity equal to the mass of the particle multiplied by the cross product of the position vector of the particle with its
velocity vector. The angular momentum of a system of particles is the sum of th... | 4 | [
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-0.045166015625,
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-0.01202392578125,
0.09521... | 26,733 | 26733 | |
Global Stability of Multigroup SIRS Epidemic Model with Varying Population Sizes and Stochastic Perturbation around Equilibrium
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 154725, 14 pages
http://dx.doi.org/10.1155/2014/154725
Research Article
Global Stability of Multigroup SIRS Epidemic Model with V... | 5 | [
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-0.0478515625,
-0.051269531... | 26,734 | 26734 | |
Find the volume of a solid using both the disk/washer and shell method.
June 23rd 2012, 10:38 AM #1
Newbie
Joined
Jun 2012
From
Earth
Posts
5
Find the volume of a solid using both the disk/washer and shell method.
Let R be the region bounded by the following curves. Let S be the solid generated  ... | 5 | [
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Tangents to a curve
May 16th 2009, 09:42 AM #1
Junior Member
Joined
Mar 2009
Posts
29
Tangents to a curve
This is a University level homework question that I am having some difficulty with....
Find the equation of the line with the slope -1 that is the tangent to the curve
$<br /> y=\frac{1}{x-1... | 5 | [
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... | 26,736 | 26736 | |
Roots of a polynominalp(x)
March 1st 2010, 02:39 AM #1
Newbie
Joined
Nov 2009
Posts
1
Roots of a polynominalp(x)
Hey, I was wondering if anybody would be able to explain how to arrive to (a). It's in my notes but I don't seem how they got there?
Find the roots of the following polynominal.
p(x)... | 4 | [
-0.048583984375,
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0.047119140625,
-0.0703125,
-0.... | 26,737 | 26737 | |
Random Walk in 1-D
May 2nd 2010, 11:40 PM #1
Super Member
Joined
Apr 2009
Posts
677
Random Walk in 1-D
Consider a random walk in one dimension.
Consider a numberline with integers marked on it. A drunkard it at x=0 at t=0. At each time interval he jumps +1 or -1. i.e. at t=1 he can be at x=1 or x = ... | 5 | [
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0.0... | 26,738 | 26738 | |
New Solutions for (1+1)-Dimensional and (2+1)-Dimensional Ito Equations
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 537930, 24 pages
http://dx.doi.org/10.1155/2012/537930
Research Article
New Solutions for (1+1)-Dimensional and (2+1)-Dimensional Ito Equations
^1Department of Mathematics, Facu... | 5 | [
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Combining differientation rules.. (chain, product, quotient)
March 6th 2010, 11:59 AM
kmjt
Combining differientation rules.. (chain, product, quotient)
I know all 3 of the rules (product, chain, quotient) and I know how to apply them to derive a function when that function ONLY uses 1 of those rules. But questio... | 5 | [
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0.04101562... | 26,740 | 26740 | |
Fine Spectrum of the Generalized Difference Operator
International Journal of Analysis
Volume 2013 (2013), Article ID 630436, 4 pages
http://dx.doi.org/10.1155/2013/630436
Research Article
Fine Spectrum of the Generalized Difference Operator over the Class of Convergent Series
Mathematical Sciences Division, Instit... | 5 | [
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0.02648925781... | 26,741 | 26741 | |
the encyclopedic entry of flywheel
A flywheel is a mechanical device with significant moment of inertia used as a storage device for rotational energy. Flywheels resist changes in their rotational speed, which helps steady the
rotation of the shaft when a fluctuating torque is exerted on it by its power source such as ... | 5 | [
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-0.0568... | 26,742 | 26742 | |
On the M-Projective Curvature Tensor of
ISRN Geometry
Volume 2013 (2013), Article ID 932564, 6 pages
http://dx.doi.org/10.1155/2013/932564
Research Article
On the M-Projective Curvature Tensor of -Contact Metric Manifolds
Department of Mathematical Sciences, APS University, Rewa, Madhya Pradesh 486003, India
Recei... | 5 | [
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0.00390625,
-0.035888671... | 26,743 | 26743 | |
Get homework help at HomeworkMarket.com
Question
Submitted by
neel
on Fri, 2013-07-26 08:54
due on Tue, 2013-07-30 08:52
answered 1 time(s)
neel is willing to pay $30.00
bus 320 connect homework 5
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value:
1.00 points
Problem 10-2 Bond value [LO3]
Applied Software has $1,000 par value bonds outstanding at... | 5 | [
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... | 26,744 | 26744 | |
improper integral
March 3rd 2009, 04:39 PM #1
Newbie
Joined
Feb 2009
Posts
7
improper integral
hey everyone, got 2 questions.
the first one asks for determining all values of p for which dx/(x-p) is improper evaluated from 1 to 2.
another question asks about finding an equation for the integral... | 5 | [
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-0.0859375... | 26,745 | 26745 | |
Mathematical Induction question due in 5hrs could some1 help?
October 27th 2008, 10:28 AM
chogz
Mathematical Induction question due in 5hrs could some1 help?
This question is in matrices.
A^n = [ 1 3^n-1 ; 0 3^n ] for all integers n>=1 where A = [ 1 2 ; 0 3 ]
I got the base step
(B) let P(1) equal... | 4 | [
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0.033203125,
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... | 26,746 | 26746 | |
A Challenging Proof...
Show there are 500 consecutive integers, each of which has at least 500 different primes in its factorization.
As always with problems involving large numbers, think first about how to solve the same problem in the case of a small number, So: Show there are 3 consecutive integers, each of which ... | 4 | [
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0.01251220... | 26,747 | 26747 | |
roots
November 11th 2007, 04:09 PM
leno182
roots
please help me im gona get grounded if this aint done in 30 mins
6 square root of 7 times 3 square root of 5
square root of M square root of M squared
suare root of M squared over N cubed
3 square root of 2 + the square root of 50
... | 4 | [
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0.... | 26,748 | 26748 | |
The Robotic Lumbar Spine: Dynamics and Feedback Linearization Control
Computational and Mathematical Methods in Medicine
Volume 2013 (2013), Article ID 985248, 12 pages
http://dx.doi.org/10.1155/2013/985248
Research Article
The Robotic Lumbar Spine: Dynamics and Feedback Linearization Control
^1Mechanical Engineerin... | 4 | [
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0.031005859375,
-0... | 26,749 | 26749 | |
HowStuffWorks "How do you convert engine torque to horsepower?"
Have you ever looked at the specs of an engine in a magazine and seen something like "this engine makes 300 pound-feet of torque at 4,000 RPM," and wondered how much power that was? How much
horsepower are we talking about here? You can calculate how man... | 4 | [
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0.063... | 26,750 | 26750 | |
Parametric tangent line
February 2nd 2010, 07:43 AM #1
Junior Member
Joined
Feb 2010
Posts
36
Parametric tangent line
Find parametric equations for the tangent line to the curve with the given parametric equations at the specified point.
$x=ln(t), y=2(sqrt(t)), z=t^2; (0,2,1)$
My question is, d... | 4 | [
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0.1162109375,
-0.138671875,
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-Nonexpansive Mappings in the Intermediate Sense
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 636217, 13 pages
http://dx.doi.org/10.1155/2012/636217
Research Article
On Asymptotically Quasi--Nonexpansive Mappings in the Intermediate Sense
^1Department of Mathematics, Hangzhou Normal University, Hangz... | 5 | [
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0.01965332031... | 26,752 | 26752 | |
Help on exponential question
Last edited by kiranizzle; December 3rd 2009 at 08:26 AM.
I'll give you the answer for the growing case in i and ii Note y = Ae^(kt) y(0) = A y = y(0)e^(kt) = y0 e^(kt) if y(t1) = y1 Then y1 = y0 e^(kt1) 1/kln(y1/y0) = t1 Similarly for ii y(tn) = yn yields
1/k ln(yn/y0) = tn For your Lake ... | 5 | [
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Certain New Classes of Analytic Functions with Varying Arguments
Journal of Complex Analysis
Volume 2013 (2013), Article ID 958210, 5 pages
http://dx.doi.org/10.1155/2013/958210
Research Article
Certain New Classes of Analytic Functions with Varying Arguments
^1Department of Mathematics, Faculty of Science, Damietta... | 5 | [
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-0.09912109375,
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The Central Extension Defining the Super Matrix Generalization of
Advances in Mathematical Physics
Volume 2011 (2011), Article ID 870613, 9 pages
http://dx.doi.org/10.1155/2011/870613
Research Article
The Central Extension Defining the Super Matrix Generalization of
Famaf-CIEM, Universidad Nacional de Córdoba, Ciuda... | 5 | [
-0.12890625,
-0.00885009765625,
-0.05078125,
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0.0302734375,
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-0.028076171875,
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0.0097... | 26,755 | 26755 | |
Long-Time Behaviour of Solutions for Autonomous Evolution Hemivariational Inequality with Multidimensional “Reaction-Displacement” Law
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 450984, 21 pages
http://dx.doi.org/10.1155/2012/450984
Research Article
Long-Time Behaviour of Solutions for Autonomous Ev... | 4 | [
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diff
RC DIFFERENTIAL EQUATION
Cuthbert Nyack Equating the voltages across the resistor and capacitor to the applied voltage gives the following equation.
Which can be rearranged to give a first order differential equation for q(t).... | 5 | [
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Vector Product
February 15th 2010, 02:27 PM
axa121
Vector Product
Hi there I was attempting a previous exam question on vector products but I was not sure it I had done it correctly. Could someone please look over my solution and help me out to part B.
Show that the line L: $\frac{x-2}{1} = \frac{y+3}{-2}=\... | 5 | [
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Find equation of a circle given three points without using determinants
June 21st 2011, 12:20 PM #1
Newbie
Joined
Mar 2011
Posts
7
Find equation of a circle given three points without using determinants
I am solving the problems of an elementary linear algebra textbook. In the section where Gaussian elim... | 4 | [
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Simulation of Intra-Aneurysmal Blood Flow by Different Numerical Methods
Computational and Mathematical Methods in Medicine
Volume 2013 (2013), Article ID 527654, 10 pages
http://dx.doi.org/10.1155/2013/527654
Research Article
Simulation of Intra-Aneurysmal Blood Flow by Different Numerical Methods
^1Department of C... | 4 | [
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Game theory and baseball, part 2: introduction to pitch selection
This article will be about pitch selection, which is probably the most important use of game theory in baseball. I will spend several articles discussing different ways of modeling pitch selection,
but for today I will only consider pitch selection as a ... | 5 | [
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The path of economic growth and the role of central planners
Featured
The path of economic growth and the role of central planners ... | 4 | [
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... | 26,762 | 26762 | |
bacteria growth
October 24th 2007, 05:57 PM #1
Newbie
Joined
Oct 2007
Posts
13
bacteria growth
A population of protozoa develops with a constant relative growth rate of 0.5589 per member per day. On day zero the population consists of five members. Find the population size after four days.
Round to t... | 5 | [
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Homework Help
Posted by Michael on Thursday, April 12, 2012 at 4:52pm.
Evaluate the integral.
The integral from the square root of three over three to the square root of three of the function 6/(t^2+1)
• Calculus - Steve, Thursday, April 12, 2012 at 5:22pm
This is one of your standard integrals:
∫dx/(x^2... | 5 | [
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Cone Height
March 8th 2008, 06:00 PM
tmrwcomestoday
Cone Height
Ok, so here's the problem:
"The volume of a cone is found by using the formula V = 1/3*Pi(Squared)*h
Sarah is experimenting to find how high she needs to build a concial storage tower. She knows the volume of a material to be stored is 112... | 4 | [
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0.0673828125... | 26,765 | 26765 | |
Fundamental Theorem of Algebra (Analysis Question Help)
November 24th 2012, 08:56 PM #1
Member
Joined
Jan 2010
Posts
88
Fundamental Theorem of Algebra (Analysis Question Help)
So I'm not sure if I am posting in the right section, but here is my question.
Code:
P(X)=(8e^2i)-(2e^4i)(X^2)+3X^3
... | 4 | [
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Homework Help
Posted by Rudy on Monday, October 29, 2012 at 2:32am.
If the line 3x-4y=0 is tangent in the first quadrant to the curve y=x^3+k, then k is
a: 1/2
b: 1/4
c: 0
d: -1/8
e: -1/2
• Calculus - Reiny, Monday, October 29, 2012 at 9:00am
if y = x^3 + k
dy/dx = 3x^2 , which of course is the slope ... | 4 | [
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... | 26,767 | 26767 | |
becker
Main Links Orders Post Next Page Next + 10
Dear Ed,
The math puzzle of the week shows three triangles seemingly combined to form a 22-27-30 triangle. We are asked what is wrong with the figure. It is correct that the sum of the th... | 4 | [
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True Discount
IMPORTANT CONCEPTS
Suppose a man has to pay Rs. 156 after 4 years and the rate of interest is 14% per annum. Clearly, Rs. 100 at 14% will amount to R. 156 in 4 years. So, the
payment of Rs. now wil... | 4 | [
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-... | 26,769 | 26769 | |
Average to 1000
Find the average for the 1000 whole numbers from 1 to 1000, inclusive.
Herllo, aznmartinjai! Find the average for the 1000 whole numbers from 1 to 1000, inclusive. Simple . . . add the numbers from 1 t0 1000 and divide by 1000 . . . LOL! If you know the formula for the
sum of the first n positive integ... | 4 | [
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0.04443359375,
-0.002578735... | 26,770 | 26770 | |
Elementary Math Problem
March 23rd 2009, 11:36 AM
phillyfan09
Elementary Math Problem
How many cubes are in the 10th collection of cubes in this sequence?
1st- 1 cube
2nd- 4 cubes
3rd- 10 cubes.....
l
l
l
10th- ? cubes
Any help appreciated!
March 23rd 2009, 12:38 PM
Grandad
T... | 4 | [
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0.04248046875,
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-0.01953125,
0.0216064453125,
-0.064... | 26,771 | 26771 | |
Hyers-Ulam Stability of Iterative Equation in the Class of Lipschitz Functions
Discrete Dynamics in Nature and Society
Volume 2014 (2014), Article ID 454569, 7 pages
http://dx.doi.org/10.1155/2014/454569
Research Article
Hyers-Ulam Stability of Iterative Equation in the Class of Lipschitz Functions
Department of Mat... | 5 | [
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A Penalization-Gradient Algorithm for Variational Inequalities
International Journal of Mathematics and Mathematical Sciences
Volume 2011 (2011), Article ID 305856, 12 pages
http://dx.doi.org/10.1155/2011/305856
Research Article
A Penalization-Gradient Algorithm for Variational Inequalities
^1Département Scientifiqu... | 5 | [
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Quickie #17
If $f(x)\:=\:\ln\left(\frac{1+x}{1-x}\right)$ .for $-1 < x < 1$, . . express $f\left(\frac{3x+x^3}{1 + 3x^2}\right)$ in terms of $f(x)$.
I don't know if there is a shortcut, but if you simply plug the argument into the f(x) formula you get: $ln \left ( \frac{ 1 + \frac{3x + x^3}{1 + 3x^2} }{ 1 - \frac{3x +... | 4 | [
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0.00167083740234375,
-0.... | 26,774 | 26774 | |
Much needed help on this integral/density function/probabilty world problem
April 5th 2012, 06:43 AM #1
Newbie
Joined
Apr 2012
From
canada
Posts
1
Much needed help on this integral/density function/probabilty world problem
Question:
Fatima and Zack both have labs which end at noon. Every day aft... | 5 | [
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... | 26,775 | 26775 | |
Simple harmonic motion
11-17-99
Sections 10.1 - 10.4
The connection between uniform circular motion and SHM
It might seem like we've started a topic that is completely unrelated to what we've done previously; however, there is a close connection between circular motion and simple harmonic motion. Consider
an object... | 4 | [
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0.03930664... | 26,776 | 26776 | |
[Abstract Algebra] Infinite countable sets • /r/cheatatmathhomework
[Abstract Algebra] Infinite countable sets (self.cheatatmathhomework)
submitted by Splike
sorry, this has been archived and can no longer be voted on
The Question
Let A be an infinite countable set. Prove that the set of all finite subsets of A... | 5 | [
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0.0244140625,... | 26,777 | 26777 | |
proof (compound angles) trig identities
November 21st 2009, 05:32 AM #1
Newbie
Joined
Nov 2009
From
Grimsby, England
Posts
24
proof (compound angles) trig identities
hi ,im struggling with this question,all help greatly appreciated
this is the proof question ..
sin(A+B) / sin(A-B) = (tanA +... | 4 | [
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-0.0016937255859375,
0.0... | 26,778 | 26778 | |
modulus equation
April 14th 2010, 11:06 AM #1
Member
Joined
Apr 2010
Posts
135
modulus equation
am trying to solve for x in this equation
$x^2-\mid x \mid - 12 < 0$
$\mid x \mid <12-x^2$
$\mid x \mid^2 >{(12-x^2})^2$ squaring both sides
i end up with $x^4 - 24x^2+144=0$ can i get some h... | 4 | [
0.031494140625,
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0.01141357421875,
0.04345703125,
-0.103027... | 26,779 | 26779 | |
Help with log problem
August 24th 2007, 11:40 PM #1
Newbie
Joined
Aug 2007
From
fratta terme forli Italy
Posts
14
Help with log problem
I am not sure what to use for this problem, I think it is a log is there any formula I could use to solve this ? Any help appreciated, I am studying problems from ol... | 4 | [
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-0.023071289062... | 26,780 | 26780 | |
Nonstandard Card-Based Probablility Question
September 20th 2011, 04:27 PM
Moxen
Nonstandard Card-Based Probablility Question
This isn't a homework problem that I need help with or anything of that nature. This is more of a personal math-related problem.
I play a collectable card game, and I am trying to de... | 5 | [
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0.02392578125... | 26,781 | 26781 | |
Slopes of perpendicular lines..
July 18th 2006, 08:52 PM #1
Newbie
Joined
Jul 2006
Posts
17
Slopes of perpendicular lines..
if
a and 3
-
2
are the slopes of perpendicular lines, a =
someone wanna explain negative recipricals to me?
zoso
if
a and 3
-
2
are... | 4 | [
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0.01928710937... | 26,782 | 26782 | |
Math Help
June 12th 2008, 07:32 AM #1
Member
Joined
May 2008
Posts
94
Counting
Hi there I have a question...
Can anyone explain me this question which is along with its answer!
Count the set S of 3 digit numbers which begin or end
with an even digit.
Assume that 0 is even but a number ... | 4 | [
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0.0244140625,
-0.0274658203125,
-0.04052734375,
-0.03173828125,
-0.04248046875,
-0.083984... | 26,783 | 26783 | |
Wavelet-Based Dynamic Texture Classification Using Gumbel Distribution
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 762472, 7 pages
http://dx.doi.org/10.1155/2013/762472
Research Article
Wavelet-Based Dynamic Texture Classification Using Gumbel Distribution
^1College of Information and Communi... | 4 | [
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Texture Enhancement Based on the Savitzky-Golay Fractional Differential Operator
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 149289, 8 pages
http://dx.doi.org/10.1155/2013/149289
Research Article
Texture Enhancement Based on the Savitzky-Golay Fractional Differential Operator
^1Faculty of Com... | 4 | [
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Modeling and Computation of Heat Transfer through Permeable Hollow-Pin Systems
Advances in Mechanical Engineering
Volume 2012 (2012), Article ID 587165, 12 pages
http://dx.doi.org/10.1155/2012/587165
Research Article
Modeling and Computation of Heat Transfer through Permeable Hollow-Pin Systems
Department of Mechani... | 4 | [
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Homework Help
Posted by Ana on Thursday, January 28, 2010 at 10:53pm.
To win $1 million, you must draw two cards whose sum is nine from a stack of cards numbered 1 through 10. After the first draw, you replace the card and shuffle the stack again for the second draw.
What is the chance that your two cards will have a ... | 4 | [
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0.019897... | 26,787 | 26787 | |
derivative.. problem
January 23rd 2010, 09:43 AM
wolfhound
derivative.. problem
Hello,
I need help , can someone show me how to find the derivative of the problem in the attached photo
Please
January 23rd 2010, 09:54 AM
drumist
$f(t)=\left(t+\frac{1}{t}\right)^{-2}$
$f'(t) = -2 \left(t+\frac{... | 4 | [
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Inflection Points
March 18th 2008, 09:17 PM #1
Inflection Points
I already know my first derivative to be:
$f'(x) = 16\cos {x}(-\sin {x} - 1)$
So I solved for my second derivative and got:
$-16\sin {x}(-\sin {x} - 1) + 16\cos {x}(-\cos {x})$
$= 16\sin {x}(\sin {x} + 1) - 16\cos^2 {x}$
I'm... | 4 | [
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Wine tasting from Prob and Stat for Engineering and the Sciences by Devore
July 24th 2010, 08:45 AM #1
Wine tasting from Prob and Stat for Engineering and the Sciences by Devore
OK, I am completely baffled at how to come up with a standard deviation on the following problem. This is my pathetic attempt to solve. ... | 5 | [
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-... | 26,790 | 26790 | |
Home Brew Forums - Hit your gravity targets!
chriscrick 12-03-2011 05:28 AM
Hit your gravity targets!
Most brewing software out there calculates grain bills based on a brewhouse efficiency provided by the user. The problem is, one's efficiency is totally dependent on the actual grain bill. Especially
for BIAB-ers,... | 4 | [
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Continuous compounding
March 11th 2009, 11:39 AM #1
Newbie
Joined
Mar 2009
Posts
7
Continuous compounding
I'm having a lot of trouble with my calculus homework. Does anyone know how to work this problem?
Suppose the consumption of electricity grows at 7.6% per year, compounded continuously. Find the ... | 5 | [
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Linear transformation
February 6th 2010, 06:17 PM #1
Junior Member
Joined
Apr 2009
Posts
53
Linear transformation
Consider the linear transformation T : P2 -> P1 specified by T(a0 + a1x +
a2x^2) = (-3a0 + 14a1 - 6a2) + (a0 - 4a1 + 2a2)x.
(a) Write this an equivalent mapping from R^3 to R^2.
(... | 4 | [
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-0.0629882812... | 26,793 | 26793 | |
area under curve and line.
April 24th 2009, 08:26 AM #1
Super Member
Joined
Sep 2008
Posts
607
area under curve and line.
The diagram shows a sketch of part of the curve with equation y=x2+1 and the line with equation y=7−x. The finite region R1 is bounded by the line and the curve. The finite region R2 ... | 4 | [
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Help with proving an identity.
February 13th 2011, 12:19 PM #1
Junior Member
Joined
Feb 2011
Posts
66
Help with proving an identity.
I recently found this problem in my maths book, and I don't know how I should solve it:
Show that $L^2=(ab+cd)(ac+bd)/(bc+ad)$
I looked in the answers section of... | 5 | [
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Dice session :-)
May 6th 2010, 12:34 PM #1
Junior Member
Joined
Apr 2010
Posts
36
Dice session :-)
10 dice is rolled, what is the probability of:
a) getting one & two once and all other numbers exactly twice
b) getting one & two exactly 3 times
c) getting four even and six odd numbers
d)... | 5 | [
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long division using the remainder theorem
November 21st 2005, 11:06 AM
emydawn
long division using the remainder theorem
we have just learnt this topic but i dont understand how i would do this:
2x^4 + 3x^3 – 2x^2 + 4x – 6
divided by
x^2 + x – 2
using the remainder theorem
(aka in the for... | 4 | [
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A General Iterative Algorithm with Strongly Positive Operators for Strict Pseudo-Contractions
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 757986, 6 pages
http://dx.doi.org/10.1155/2013/757986
Research Article
A General Iterative Algorithm with Strongly Positive Operators for Strict Pseudo-Contraction... | 5 | [
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[SOLVED] ccookies, sample
April 20th 2010, 03:57 PM #1
Junior Member
Joined
Apr 2010
Posts
51
[SOLVED] ccookies, sample
Let X equal the weight of a cookie. Assume that the distribution of X is N(14.22,0.0854). These cookies are sold in packages with labeled weight 340. The number of cookies is usually 24... | 5 | [
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... | 26,799 | 26799 |