content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
m06 Q5
Author Message
4
This post was
BOOKMARKED
If equation
|x| + |y| = 5
encloses a certain region on the gr... | 4 | [
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Calculus III unit tangent and unit normal vectors
February 15th 2013, 12:38 PM #1
Newbie
Joined
Feb 2013
From
Missouri
Posts
1
Calculus III unit tangent and unit normal vectors
Consider the following vector function: r(t) = {2t*sqrt(2),e^2t,e^-2t}.
(a) Find the unit tangent and unit normal vecto... | 4 | [
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Analytic Geometry - Reflecting points over lines
Posted by Knights on Monday, March 4, 2013 at 9:15pm.
Let P = (5,1), and let Q be the reflection of P over the line y = 1/2x + 2. Find the coordinates of Q.
I don't understand how to start? Should we draw perpendicular lines?
Analytic Geometry - Reflecting points over... | 4 | [
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Conversion Circuit for Robot Tactile Sensor
Journal of Sensors
Volume 2013 (2013), Article ID 624981, 5 pages
http://dx.doi.org/10.1155/2013/624981
Research Article
A Tent Map Based Conversion Circuit for Robot Tactile Sensor
^1NARI Technology Development Limited Company, Nanjing 210061, China
^2Experiment & Verifi... | 4 | [
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The Graph of Equivalence Classes of Zero Divisors
ISRN Discrete Mathematics
Volume 2014 (2014), Article ID 896270, 7 pages
http://dx.doi.org/10.1155/2014/896270
Research Article
The Graph of Equivalence Classes of Zero Divisors
Department of Mathematics, University of Pune, Pune 411007, India
Received 13 December 2... | 5 | [
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A Computationally Efficient, Exploratory Approach to Brain Connectivity Incorporating False Discovery Rate Control,
Computational and Mathematical Methods in Medicine
Volume 2012 (2012), Article ID 967380, 14 pages
http://dx.doi.org/10.1155/2012/967380
Research Article
A Computationally Efficient, Exploratory Approa... | 4 | [
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solving a system of nonlinear equations
November 15th 2008, 07:26 PM
vbarnett326
solving a system of nonlinear equations
14x^2-3xy+9y^2=71
2x+3y=9
I solve for x in the second equation and get x=-3y+9 /2 but when i plug it back in i am not sure how to square (-3y+9)/2 in the first equation?
November 15t... | 4 | [
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How do I show that lim x->inf (1 + 1/n)^n = e ?
May 6th 2010, 10:33 AM #1
Super Member
Joined
Nov 2008
Posts
597
How do I show that lim x->inf (1 + 1/n)^n = e ?
How do I SHOW that lim x->inf (1 + 1/x)^x = e ? Is it possible with techniques (easy and/or hard) (as long as it is using what schools teach Cal... | 5 | [
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Halstead Metrics
Measurement of Halstead Metrics with Testwell CMT++ and CMTJava (Complexity Measures Tool)
Quick finder:
B D E L N n N1 n1 N2 n2 T V
1 Purpose and Origin
Halstead complexity metrics were developed by the late Maurice Halstead as a means of determining a quantitative measure of complexity directly f... | 4 | [
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Irritating probability question
October 2nd 2010, 05:42 PM #1
Member
Joined
Sep 2010
Posts
151
Thanks
1
Irritating probability question
A Man has three coins one of which is biased so that it turns up tails 80% of the time.If he randomly selects one of the coins, tosses it three times, and obtains th... | 5 | [
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Find exit speed at the bottom of the ramp using kinematics only
1. The problem statement, all variables and given/known data
A professional skier's initial acceleration on fresh snow is 90% of the acceleration expected on a frictionless, inclined plane, the loss being due to friction. Due to air resistance, his
acceler... | 4 | [
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how to determine the complex integral ∫f(e^it) cost dt
December 5th 2011, 09:10 PM #1
If f(z) is an analytic function, then what will be the value of ∫f(e^it) cost dt,
,where (limit of integration) lower limit=0, upper limit =2π.
Thanks for your help in advance. regards.
Re: how to determine the complex... | 5 | [
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Distributed Asynchronous Fusion Algorithm for Sensor Networks with Packet Losses
Discrete Dynamics in Nature and Society
Volume 2014 (2014), Article ID 957439, 10 pages
http://dx.doi.org/10.1155/2014/957439
Research Article
Distributed Asynchronous Fusion Algorithm for Sensor Networks with Packet Losses
School of Au... | 4 | [
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Kamenev-Type Oscillation Criteria for the Second-Order Nonlinear Dynamic Equations with Damping on Time Scales
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 253107, 18 pages
http://dx.doi.org/10.1155/2012/253107
Research Article
Kamenev-Type Oscillation Criteria for the Second-Order Nonlinear Dynamic E... | 5 | [
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A certain list consists of 21 different numbers. If n is in
Author Message
TAGS:
A certain list consists of 21 different numbers. If n is in [#permalink] 31 Oct ... | 4 | [
0.05224609375,
0.0625,
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existence of non-trivial solution!!!
November 9th 2012, 04:53 PM
alphabeta89
existence of non-trivial solution!!!
Show that the differential equation $x' = \frac{x \sin(e^x+t)}{1+(e^t \cos x+x)^2}$ has a nontrivial solution $\phi(t)$ defined on
[0,2] such that $0 < \phi(t) < \frac{\pi}{2}$ for all t in [0,2]... | 4 | [
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Understanding the Unit circle and the Trigonometric functions
July 24th 2007, 11:57 PM #1
Member
Joined
Jul 2007
Posts
147
Understanding the Unit circle and the Trigonometric functions
Dear members of the Math Help Forum,
I am going to be soon entering high school(the Finnish school system), and th... | 4 | [
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[SOLVED] Matrix multiplication
February 7th 2010, 12:17 AM #1
Junior Member
Joined
Mar 2009
Posts
65
[SOLVED] Matrix multiplication
I am not sure what i am doing wrong in this question
Q. find a 2x2 matrix such that
|7 -4| |x y| |1 0|
|3 -1| * |z w|= |0 1|
I set it up like this
7... | 5 | [
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the encyclopedic entry of Wavelet series
In
mathematics
, a
wavelet series
is a representation of a
square-integrable
(
real
- or
complex
-valued)
function
by a certain
orthonormal series
generated by a
wavelet
. This article provides a formal, mathematical definition of an
orthonormal wavelet
and of ... | 4 | [
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0... | 29,518 | 29518 | |
Paul Magnano:Assignment Week 2
From OpenWetWare
(Difference between revisions)
(→Question 1) (→Question 2)
← Previous diff Next diff →
Line 21: Line 21:
==Question 2== ==Question 2==
+
+
+
+
+
+
... | 4 | [
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... | 29,519 | 29519 | |
How'd they simplify it to this?
December 29th 2012, 09:39 AM #1
Newbie
Joined
Jul 2011
Posts
5
In my book, 2(L^2+X^2)^1/2 has been simplified to 2L(1+ X^2/L^2)^1/2.
I was wondering how exactly have they factorized this? Also, the power of half cannot be removed because later on, I have to apply binom... | 4 | [
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0.0810546875,
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0.033203125,
... | 29,520 | 29520 | |
The Nonlinear Distortions in the Oscillatory System of Generator on CFOA
Active and Passive Electronic Components
Volume 2012 (2012), Article ID 908716, 6 pages
http://dx.doi.org/10.1155/2012/908716
Research Article
The Nonlinear Distortions in the Oscillatory System of Generator on CFOA
National Research Tomsk Poly... | 4 | [
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Nonlinear Inequality problem?
April 1st 2012, 01:21 PM #1
Newbie
Joined
Apr 2012
From
MD
Posts
1
Nonlinear Inequality problem?
[]Ok what am I missing here?
x2 + 7x + 6 > 0 I have this, to solve I factor,
(x+1)(x+6)>0 then
x+1>0 Solve for zero
-1 -1
x>-1 Answer 1
(-1,Infinity... | 4 | [
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the encyclopedic entry of Energy Filter
A
sector instrument
is a general term for a class of
mass spectrometer
that utilizes a static electric or magnetic sector or some combination of the two (separately in space) as a mass analyzer. A popular combination of these sectors has been the BEB
(magnetic-electric-magnet... | 4 | [
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0.01519775390625,
-0.0228271484375,
0.01544189453125,
-0.06787109375,
-0.02282... | 29,523 | 29523 | |
ci
SciPy
Again I recommend this http://www.scipy.org/Wiki/Documentation?action=AttachFile&do=get&target=scipy_tutorial.pdf. There are many useful SciPy modules, in particular scipy.optimize, scipy.stats,
scipy.linalg, scipy.linsolve, scipy.sparse, scipy.integrate, scipy.fftpack, scipy.signal, scipy.special. Most of th... | 5 | [
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0.02185... | 29,524 | 29524 | |
[SOLVED] |AP – BP| is minimum for...?
October 27th 2008, 06:52 AM #1
[SOLVED] |AP – BP| is minimum for...?
Let A(-2, -1) & B(3, 2) be two fixed points and P be a point on the line 3x + y = 1, for which location of P, |AP – BP| is minimum?
A) (2,-5)
B) (0,1)
C) (1, -2)
D) none
fardeen,
$... | 4 | [
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-... | 29,525 | 29525 | |
Amoeba Solution
If p is the probability that a single amoeba's descendants will die out eventually, the probability that N amoebas' descendents will all die out eventually must be p^N, since each amoeba is
independent of every other amoeba. Also, the probability that a single amoeba's descendants will die out must be i... | 5 | [
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-0.029174804687... | 29,526 | 29526 | |
the encyclopedic entry of step-function
The Heaviside step function, H, also called the unit step function, is a discontinuous function whose value is zero for negative argument and one for positive argument. It seldom matters what value
is used for H(0), since $H$ is mostly used as a distribution. Some common choices ... | 4 | [
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0.0888671875,
0.0224609375,
-0.006011962890625,
0.003753662109375,
0.0159912109375,
-0.09326171875,
-0.00634765625... | 29,527 | 29527 | |
recurrence problem...
August 20th 2009, 12:28 AM #1
Newbie
Joined
Jul 2009
Posts
23
do u have any idea on this?
question :
let n >=2, 0 < X1< X2 <....< Xn-1 < Xn,
for Xk , k=1,2,....,n to be integers
Define
Sn=(1 + 1/X1)(1 + 1/X2)....(1 + 1/Xn) - 1,
then
i) Show the recurre... | 4 | [
-0.0673828125,
-0.04443359375,
0.0673828125,
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0.005859375,
-0.042236328125,
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0.062255859375,
-0.006683349609375,
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0.031494140625,
-0.00408935546875,
-0.0830078125,
0.00714111328125,
0.051513671875,
-0.021... | 29,528 | 29528 | |
Determine the co-ordinates
September 9th 2011, 01:54 PM #1
Newbie
Joined
Sep 2011
Posts
6
Determine the co-ordinates
This is my first post. I graduated from mathematics in university 16 years ago so I am somewhat out of practice. I recently ran into my high school teacher from several years ago and he po... | 4 | [
0.0478515625,
0.0108642578125,
-0.046875,
-0.06396484375,
-0.014404296875,
0.10400390625,
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-0.00653076171875,
0.004913330078125,
-0.01513671875,
0.061279296875,
-0.0036773681640625,
0.036865234375,
-0.03125,
-0.0218505859375,
0.0625,
-0.1162109375,
-0.1162109375,
-... | 29,529 | 29529 | |
Integral problem
April 4th 2009, 11:01 AM
LaraSoft
Integral problem
Hello!
Can someone help me with this problem (advanced section):
Calculate the indefinite integral $\int[(1+\sin(x))/(1-\sin(x))^2]dx$, not using a universal substitution $\tan(x/2)=t$.
Thanks in advance!
April 4th 2009, 11:31 AM
... | 5 | [
0.0021514892578125,
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0.0308837890625,
0.0498046875,
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0.06005859375,
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0.05859375,
-0.0027313232421875,
0.042236328125,
0.048095703125,
-0.... | 29,530 | 29530 | |
Le Monde puzzle [43]
November 7, 2010
By xi'an
Here is the puzzle in Le Monde I missed last week:
Given a country with 6 airports and a local company with three destinations from each of the six airports, is it possible to find a circular trip with three intermediate stops from one of the
airports? From all... | 5 | [
0.123046875,
-0.07177734375,
-0.0830078125,
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0.0810546875,
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0.04931640625,
-0.1298828125,
-0.1015625,
-0.00... | 29,531 | 29531 | |
Some Iterative Methods for Solving Nonconvex Bifunction Equilibrium Variational Inequalities
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 280451, 10 pages
http://dx.doi.org/10.1155/2012/280451
Research Article
Some Iterative Methods for Solving Nonconvex Bifunction Equilibrium Variational Inequalitie... | 4 | [
-0.007232666015625,
-0.03125,
0.06787109375,
-0.0283203125,
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0.02490234375,
0.0673828125,
-0.03198... | 29,532 | 29532 | |
how should i solve this question?
February 29th 2012, 12:11 PM #1
Newbie
Joined
Feb 2012
Posts
3
The copper content of an alloy is 60%. If 1 kg of copper is added into the alloy, the copper content of the alloy will increase to 70%.
a. Find the original weight of the alloy.
b. Find the percentage ... | 4 | [
-0.060546875,
0.07763671875,
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0.039794921875,
-0.010009765625,
0.006134033203125,
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0.0322265625,
-0.080078125,
-0.019775390625,
-0.006744384765625,
-0.1376953125,
0.0252685546875,
0.02685546875,
-0.0380859375,
0.013427734375,
0.040771484375,
0.05126953... | 29,533 | 29533 | |
Homework Help
Posted by Pat on Thursday, August 16, 2012 at 3:38pm.
Are these right?!
Absolute value :
1. |x^2-2x+16|=8
x=-4
x=-3
x=-2
x=2
2.|3x-2|=7
x=5\3
x=3
3. |3x+2|+3=0
x= -5/3
• Algebra2 - Reiny, Thursday, August 16, 2012 at 4:44pm
1.
x^2 - 2x + 16 = 8 or x^2 - 2x + 16 = -8
x^2 - 2x + ... | 4 | [
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0.024169921875,
-0.044677734375,
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0.005340576171875,
-0.09082... | 29,534 | 29534 | |
Triple Exponential Smoothing
To handle seasonality, we have to add a third parameter In this case double smoothing will not work. We now introduce a third equation to take care of seasonality (sometimes called periodicity). The
resulting set of equations is called the "Holt-Winters" (HW) method after the names of the i... | 4 | [
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-0.045166015625,
0.08642578125,
0.05615234375,
-0.0869140625,
0.01794... | 29,535 | 29535 | |
Bootstrapping time series
Bootstrapping time series – R code
Bootstrapping in its general form (“ordinary” bootstrap) relies on IID observations which staples the theory backing it. However, time series are a different animal and bootstrapping time series
requires somewhat different procedure to preserve dependency st... | 4 | [
-0.12451171875,
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0.043212890625,
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0.026611328125,
-0.0255126953125,
-0.076171875,
-0.08154296875,
-0.006317... | 29,536 | 29536 | |
vector space
January 7th 2012, 01:04 PM
ely_en
vector space
Hello :)
I need some help to this problem...
We say that a sequence of morphisms of K-vector spaces $V_1--f-->V_2--g-->V_3$ is an exact sequence if $Ker(g) = Im(f).$
We have this diagram of K-vector spaces in which the horizontal lines ar... | 5 | [
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0.042724609375,
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0.05712890625,
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-0.047607421875,
0.00701904296875,
0.03466796875,
-0.02880859375,
0.019775390625,... | 29,537 | 29537 | |
Help with the Trigonometry Equation please!
February 21st 2013, 08:09 AM #1
Newbie
Joined
Sep 2012
From
UK
Posts
20
Help with the Trigonometry Equation please!
Hi guys,
I am stressing myself out coz i dont know how to do this question.
Question being:
2cos(x-30)=1
0^o≤X≤360^o
I... | 4 | [
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0.017822265625,
-0.01336669921875,
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0.0498046875,
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0.076171875,
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0.060791015625,
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0.0308837890625,
0.01336669921875,
-0.0751... | 29,538 | 29538 | |
Journal of the South African Institution of Civil Engineering
Services on Demand
Article
Indicators
Related links
Share
Print version ISSN 1021-2019
J. S. Afr. Inst. Civ. Eng. vol.52 no.1 Midrand Apr. 2010
Partial factors for selected reinforced concrete members: background to a revisionof SANS 10100-1
M Hol... | 4 | [
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-0.04345703125,
-0.06689453125,
0.04931640625,
-0.0... | 29,539 | 29539 | |
image of a circle
1. March 13th 2011, 08:20 AM #1
2. March 13th 2011, 12:27 PM #2
If you put $z = ce^{i\theta}$ (so that $z=x+iy$ lies on the circle $|z|=c$), then
$w = \frac12(z+z^{-1}) = \frac12(ce^{i\theta} + c^{-1}e^{-i\theta}) = \frac12(c+c^{-1})\cos\theta + \frac i2(c-c^{-1})\sin\theta.$
... | 4 | [
-0.1103515625,
0.0830078125,
-0.040283203125,
0.099609375,
0.078125,
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0.037109375,
-0.068359375,
0.0751953125,
-0.0037841796875,
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-0.06494140625,
0.017578125,
-0.0986328125,
0.0162353515625,
-0.0439453125,
... | 29,540 | 29540 | |
cubic equation
July 20th 2009, 05:53 AM
furor celtica
cubic equation
the equation 3x^2 - x^3 = k has three real solutions for k
write down the set of possible values for k
i dont understand: can't k = anything as long as x remains real? and what is meant by '3x^2 - x^3 = k has three real solutions for k... | 4 | [
-0.0341796875,
-0.03955078125,
-0.10498046875,
0.0224609375,
-0.050048828125,
0.020751953125,
0.03271484375,
-0.046142578125,
0.0712890625,
0.016845703125,
0.111328125,
-0.07275390625,
0.00872802734375,
-0.0556640625,
0.01373291015625,
0.0017852783203125,
-0.0810546875,
-0.04858398... | 29,541 | 29541 | |
Cooperative Search by Combining Simulated and Real Robots in a Swarm under the View of Multibody System Dynamics
Advances in Mechanical Engineering
Volume 2013 (2013), Article ID 284782, 11 pages
http://dx.doi.org/10.1155/2013/284782
Research Article
Cooperative Search by Combining Simulated and Real Robots in a Swar... | 4 | [
-0.041748046875,
-0.00506591796875,
-0.05078125,
-0.039794921875,
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-0.01336669921875,
-0.03369140625,
0.055908203125,
0.0361328125,
0.0223388671875,
0.05908203125,
-0.042236328125,
-0.0146484375,
-0.0159912109375,
0.046142578125,
0.0152... | 29,542 | 29542 | |
Zeros of cubic functions
November 16th 2006, 08:17 AM
alexia1huff
Zeros of cubic functions
Could you please help me with the following:
>Cubic function f(x)=2x^3 + 6x^2 - 4.5x -13.5.
>1) Find the roots and confirm them by remainder theorem.
>2) Taking two roots at a time, find the equations of the ta... | 5 | [
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0.06787109375,
0.045166015625,
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0.07470703125,
-0.080078125,
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0.0224609375,
0.026123046875,
0.057373046875,
-0.103515625,
0.01116943359375,
-0.... | 29,543 | 29543 | |
Electromagnetic waves
Next: Green's functions Up: Time-dependent Maxwell's equations Previous: Potential formulation
Electromagnetic waves
This is an appropriate point at which to demonstrate that Maxwell's equations possess propagating wave-like solutions. Let us start from Maxwell's equations in free space (i... | 4 | [
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0.130859375,
-0.020263671875,
-0.07080078125,
-0.1118164062... | 29,544 | 29544 | |
Need help understanding consistency
February 21st 2010, 12:37 PM
jass10816
Need help understanding consistency
I am having a hard time understanding the way my textbook explains how to check consistency. I understand the concept of how it refers to the shape of the pdf of an estimator as a function of $n$
an... | 5 | [
0.00634765625,
-0.10400390625,
0.0390625,
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0.01361083984375,
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-0.0308837890625,
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0.0027923583984375,
0.06298828125,
-0.... | 29,545 | 29545 | |
Problem Solving #3
November 2nd 2010, 05:30 PM #1
Member
Joined
Sep 2010
Posts
98
Thanks
1
Problem Solving #3
Are the two numbers
square root of 3 + and square root of 11 and
square root of 5 + square root of 8 equal? If not, which is larger?
Use calculator.
I am not allowed to. I o... | 4 | [
-0.031494140625,
0.0093994140625,
0.00689697265625,
-0.039306640625,
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0.02685546875,
-0.004119873046875,
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0.056884765625,
-0.015625,
0.0301513671875,
-0.02001953125,
-0.03955078125,
-0.01611328125,
0.04321... | 29,546 | 29546 | |
finding integral of...
i can't seem to figure out how to get this integral. the integrla of (x+1)/(x^2+2x+2) the answer is .5ln(x^2+2x+2)+C
Hello, xslim12! i can't seem to figure out how to get this integral. . . $\int \frac{(x+1)\,dx}{x^2+2x+2}$ The answer has $\ln$ in it . . . didn't it make you suspicious? Let: $u ... | 5 | [
-0.031982421875,
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0.0439453125,
-0.07421875,
-0.038330078125,
0.0113525390625,
0.0138549... | 29,547 | 29547 | |
Solving equations using calculator - Exponential/Logarithmic eq
March 13th 2008, 06:53 AM
sara555
Solving equations using calculator - Exponential/Logarithmic eq
a) (0.75)10^1.25x = 11.25
b) 3.2e^-0.5 = 0.04e^3j
c) 164.9 =log square root 2 pie R
d) log 20 + log(6x-20) = 3
e) log(x-3) = 1/2 lo... | 4 | [
-0.0296630859375,
0.0191650390625,
0.01708984375,
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0.10595703125,
0.07373046875,
0.0142822265625,
-0.11669921875,
0.030517... | 29,548 | 29548 | |
Calculating Probabilities from a Joint Distribution
November 2nd 2012, 06:44 PM
tangibleLime
Calculating Probabilities from a Joint Distribution
I spent a solid 35 minutes writing out a long and extensive post then the forum software decided I was on the page for too long and erased everything. So here it goes a... | 5 | [
0.0849609375,
-0.03857421875,
-0.062255859375,
-0.0830078125,
0.05712890625,
-0.058349609375,
0.0322265625,
-0.04736328125,
-0.0115966796875,
-0.02099609375,
0.01904296875,
0.0250244140625,
0.04541015625,
0.060302734375,
0.00982666015625,
0.083984375,
-0.00714111328125,
-0.01171875... | 29,549 | 29549 | |
Differential equation y’’’ + 6y’’ + 12y’+ 8y = 12e^(-2x)
June 15th 2008, 09:58 AM #1
Junior Member
Joined
Jun 2008
Posts
54
Differential equation y’’’ + 6y’’ + 12y’+ 8y = 12e^(-2x)
$y’’’ + 6y’’ + 12y’+ 8y = 12e^{-2x}$
EDIT: Hey, why don't the primes show up? Here's it without using the code
y’’’... | 4 | [
-0.0625,
-0.0458984375,
0.07275390625,
0.04931640625,
0.02392578125,
0.03955078125,
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0.0289306640625,
-0.004180908203125,
0.0439453125,
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0.0286865234375,
-0.0281982421875,
-0.02099609375,
-0.0299072265625,
-0.10107421875,
-0.0380859375,... | 29,550 | 29550 | |
deals of n cards for all cards appear once
February 24th 2007, 02:14 AM #1
bodgerbob
Guest
I'm looking at a privacy issue and this seems to be a simple analogy...
I have a deck of cards (let's say 52). For each experiment I perform a perfect shuffle and deal (let's say) seven cards face-up and write down the ... | 5 | [
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0.0096435546875,
0.0023651123046875,
-0.000774383544921875,
-0.045166015625,
-0.03759765625,
-0.030029296875,
-0.083984375,
-0.052978515625,
-0.005126953125,
0.0363769531... | 29,551 | 29551 | |
An Inventory Model with Price and Quality Dependent Demand Where Some Items Produced Are Defective
Advances in Operations Research
Volume 2013 (2013), Article ID 795078, 8 pages
http://dx.doi.org/10.1155/2013/795078
Research Article
An Inventory Model with Price and Quality Dependent Demand Where Some Items Produced ... | 5 | [
-0.060791015625,
0.0174560546875,
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0.043212890625,
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0.00653076171875,
0.00823974609375,
-0.0703125,
0.07763671875,
0.05053710937... | 29,552 | 29552 | |
A weird limit involving e and 1/n
September 20th 2013, 10:33 PM #1
Super Member
Joined
Mar 2006
Posts
705
Thanks
2
A weird limit involving e and 1/n
Hi, I'm working on a problem but stuck at a weird looking limit:
$\lim _{n \rightarrow \infty } [1- e^{-a-log(n)}]^2$
It is suppose to converg... | 4 | [
0.022705078125,
-0.0022125244140625,
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0.0361328125,
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0.032958984375,
0.0106201171875,
-0.050537109375,
0.035888671875,
-... | 29,553 | 29553 | |
2nd order differentiation query
December 2nd 2010, 09:38 PM #1
2nd order differentiation query
Hi All,
Given $u (x) = Ae^x$ and $u"(x)=k^2 u (x)$
then u"(x) is calculated as $u"(x) = A^2 u (x)$
How was this derived?
I calculate both u'(x) and u"(x) to be equal to Ae^x. I dont know how the A^2 ... | 5 | [
0.0233154296875,
0.007598876953125,
0.050048828125,
0.0400390625,
-0.030517578125,
-0.0040283203125,
0.022705078125,
-0.12060546875,
0.05517578125,
0.076171875,
0.1845703125,
-0.0057373046875,
0.0556640625,
-0.054443359375,
-0.015625,
-0.0267333984375,
-0.00555419921875,
0.02331542... | 29,554 | 29554 | |
differentiate sinusoidal function
April 2nd 2013, 10:11 AM
onehundredpercenteffort
differentiate sinusoidal function
Question: Differentiate with respect to x
a. y=3sin^2(2x-4) - 2cos^2 (3x+1)
b. y=sin(x^2 + pi)
My teacher says for these questions, i need to use the product rule/chain rule/power r... | 5 | [
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0.0... | 29,555 | 29555 | |
Solving a system of equations
How to solve?
x/10 = y/14 = z/35 = 1/(10x + 14y + 35z)
Have no clue how to start solving this system.
Luke.
Luke53 wrote:How to solve?
x/10 = y/14 = z/35 = 1/(10x + 14y + 35z)
One method might be to solve x/10 = y/14 and x/10 = z/35 for y and z in terms of x. Then plug this i... | 4 | [
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Congruence Proof using Wilson's Theorem
April 10th 2011, 02:15 PM #1
Junior Member
Joined
Jul 2008
Posts
74
Congruence Proof using Wilson's Theorem
Dear all,
I'm having trouble completing the proof for the following result, that requires Wilson's Theorem. I've shown this, along with my work, below.
... | 5 | [
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Constructing Z from N (integers from naturals)
June 1st 2007, 02:11 PM
Obstacle1
Constructing Z from N (integers from naturals)
Having some trouble understanding this...
This method uses an equivalence relation defined on NxN such that: (a,b)~(c,d) iff a+d=c+b
Note that we can subtract any k in N from ... | 4 | [
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If AB=3, what is the shortest side of triangle ABC?
Author Message
TAGS:
If AB=3, what is the shortest side of triangle ABC? [#permalink] 18 Aug 2013, 11:05
... | 4 | [
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probability
how many different teams of 9 can be made from 22 football players?
$C^{22}_9=\frac{22!}{9!(22-9)!}<br />$ To see this consider the players choosen in turn, the first can be any of the 22, the second any of the remaininr 21, and so on. So the number of ways the team
can be choosen in sequence is: $22 \time... | 4 | [
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... | 29,560 | 29560 | |
[SOLVED] Coprime
February 1st 2009, 06:04 AM
Louise
[SOLVED] Coprime
Hi, i'm having trouble with the following questions;
Let a, b be non-zero integers.
a) Show that if there are x,y in Z (integers) with ax + by =1, then a and b are coprime.
b) Show that the integers a/(a,b) and b/(a,b) are coprim... | 4 | [
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How do i convert this into a rectangular equation
June 24th 2008, 08:06 PM
cityismine
How do i convert this into a rectangular equation
y = cos(2t), y = sin(2t);
t is greater than or equal to -pie and less than or equal to pie.
June 24th 2008, 09:21 PM
mr fantastic
June 25th 2008, 08:34 AM
Mathstud28
... | 4 | [
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the encyclopedic entry of simple-group
In
mathematics
, a
simple group
is a
group
which is not the
trivial group
and whose only
normal subgroups
are the
trivial group
and the group itself. A group that is not simple can be broken into two smaller groups, a normal subgroup and the
quotient group
, and the ... | 4 | [
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Expected Value Markov Chain
February 13th 2011, 02:30 PM #1
Junior Member
Joined
Sep 2010
Posts
42
Expected Value Markov Chain
A Markov chain $\{X_n , n\geq 0\}$ with states $0, 1, 2$, has the transition probability matrix
$\left[ \begin{array}{ccc}<br /> \frac{1}{2} & \frac{1}{3} & \frac{1}{6} \\<br... | 4 | [
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... | 29,564 | 29564 | |
Please help me with these indices need urgent help :(
February 6th 2013, 01:25 PM #5
February 6th 2013, 01:23 PM #4
Newbie
February 6th 2013, 01:22 PM #3
Newbie
February 6th 2013, 12:39 PM #2
February 6th 2013, 11:14 AM #1
Newbie
Re: Please help me with these indices need urgent help :(
When multiplying expo... | 4 | [
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0.06298828125... | 29,565 | 29565 | |
Minimize Expected Value
February 23rd 2009, 07:18 AM
NoFace
Minimize Expected Value
Ok, the question is for what value of $a$ is the expected value $E([aX- \frac{1}{a}]^2)$ minimum, given that $\sigma ^2 >0$ and $a$$> 0$
I don't want the answer, I just want a push in the right direction. How do I find the m... | 5 | [
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0.03857421875,
-0.07080078... | 29,566 | 29566 | |
Matrix question
April 26th 2009, 05:17 AM #1
Member
Joined
Sep 2006
Posts
77
Matrix question
$A = \left( {\begin{array}{rr}<br /> {-10} & {-18} \\<br /> 9 & 17 \\<br /> <br /> \end{array} } \right)$
a) Find Y such that $Y^{-1}AY$ is diagonal.
b) Find C such that $C^3 = A$
For a I get $Y =... | 5 | [
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... | 29,567 | 29567 | |
The Equivalence of Convergence Results between Ishikawa and Mann Iterations with Errors for Uniformly Continuous Generalized Φ-Pseudocontractive Mappings in Normed Linear Spaces
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 395098, 11 pages
http://dx.doi.org/10.1155/2012/395098
Research Article
The Eq... | 5 | [
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Need STATS and PROBABILITY HELP!!!
March 8th 2013, 09:45 AM
RozayAce
Need STATS and PROBABILITY HELP!!!
Given the independant variable with mean =ux=120 and uy=300 The St. Dev is Qx= 12, Qy=16. What is the mean and ST.D of each veriibles
a) 0.8y+20 b)2x-100 c)x+2y
Please explain how you did this and sho... | 5 | [
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Given CDF find proabililty
June 15th 2011, 02:13 PM #1
Newbie
Joined
Feb 2011
Posts
23
Given CDF find proabililty
Hi guys, I feel very uncomfortable with PDF, CDF, PMF.
Problem:
The distribution function of the random variable X is given:
$F(x) = \begin{cases}0 & \text{ if } x < 0\\x/2 & ... | 4 | [
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2 basic fraction equations
June 16th 2009, 10:13 PM #1
Banned
Joined
Jun 2009
Posts
31
2 basic fraction equations
We are having a bit of fun in the office of the afternoon, and I need some confirmation on the following 2 equations:
4 & 4/5 + 3 & 7/8 – 1 & 5/6 = ?
4/9 x 1 ½ ÷ 3 1/5 = ?
If y... | 4 | [
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Growth Factor / Exponential Function
July 18th 2010, 04:25 AM #1
Newbie
Joined
Jul 2010
Posts
8
Growth Factor / Exponential Function
So I have this table B, for dollars:
t: 0, 1, 2, 3
B: 100, 110, 121, 133.10
How do i calculate the yearly growth factor for B and find a monthly interest rate... | 4 | [
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... | 29,572 | 29572 | |
[Diff Eq] Minimizing Functions/Euler-Lagrange Equation • /r/cheatatmathhomework
all 13 comments
[–]DanielxAK0 points1 point2 points
sorry, this has been archived and can no longer be voted on
Two hours later, but here it goes if you're still around:
So, in each case you're minimizing functionals. Don't worry too mu... | 4 | [
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0.0216064453125,
0.014892578125,
-0.01611328125,
0.0295410... | 29,573 | 29573 | |
Strong Global Attractors for 3D Wave Equations with Weakly Damping
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 469382, 12 pages
http://dx.doi.org/10.1155/2012/469382
Research Article
Strong Global Attractors for 3D Wave Equations with Weakly Damping
^1Department of Mathematics, Nanjing University, N... | 4 | [
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... | 29,574 | 29574 | |
Probability Help
August 11th 2007, 10:30 PM #1
Newbie
Joined
Aug 2007
Posts
5
Probability Help
Don't Know how to work out this question:
An advertising executive studied TV viewing habits of married men and women during prime time hours. He determined that during prime time, husbands watch TV 60% of... | 4 | [
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Hybrid Iterative Scheme by a Relaxed Extragradient Method for Equilibrium Problems, a General System of Variational Inequalities and Fixed-Point Problems of a Countable Family of Nonexpansive Mappings
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 572326, 18 pages
http://dx.doi.org/10.1155/2012/572326
R... | 5 | [
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... | 29,576 | 29576 | |
Autonomous system
Consider the autonomous system
$\frac{dx}{dt}=F(x, y),\ \frac{dy}{dt}=G(x, y)$
in a region where the functions $F$ and $G$ are continuously differentiable.
Suppose that $(x(t), y(t))$ is a solution of the system and that $\gammaeq 0$. Define $\phi(t)=x(t+\gamma)$ and $\psi(t)=y(t+\g... | 4 | [
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... | 29,577 | 29577 | |
need help factoring a problem
November 5th 2010, 07:37 PM #1
Junior Member
Joined
Sep 2010
Posts
60
need help factoring a problem
9x^2y^2+5xy-4
I dont really even know where to begin
My book doesnt explain what to do with this kind of problem at all. I mean it does talk about factoring trinomia... | 4 | [
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... | 29,578 | 29578 | |
IS f(x)= x^4 + x^3 -x^2 - 2x -2 irreducable over Q??
August 17th 2008, 06:16 PM #1
IS f(x)= x^4 + x^3 -x^2 - 2x -2 irreducable over Q??
IS f(x)= x^4 + x^3 -x^2 - 2x -2 irreducable over Q??
Attempt:
Ive shown that this has no linear factors as +-1 +-2 are not roots.
Then I let F(x)=(x^2+ax+b)(x^2+c... | 5 | [
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The Windowing Technique for Longest Segment Problems
In the previous post we reviewed Hans Zantema’s algorithm for solving longest segment problems with suffix and overlap-closed predicates. For predicates that are not overlap-closed, Zantema derived a
so-called “windowing” technique, which will be the topic of this p... | 4 | [
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-0.07080078125,
0.026733398437... | 29,580 | 29580 | |
A Novel Bat Algorithm Based on Differential Operator and Lévy Flights Trajectory
Computational Intelligence and Neuroscience
Volume 2013 (2013), Article ID 453812, 13 pages
http://dx.doi.org/10.1155/2013/453812
Research Article
A Novel Bat Algorithm Based on Differential Operator and Lévy Flights Trajectory
^1Colleg... | 4 | [
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Problem involving functions and inverses
December 23rd 2012, 02:48 PM
kinhew93
Problem involving functions and inverses
f(x) = (ax+b)/(cx+d) , x is real, x=/= -d/c , b=/=0 , c=/=0
Prove that if
a + d =/= 0
and
(a-d)^2 +4bc = 0
then y=f(x) and y=f^-1(x) intersect at exactly one point.
... | 4 | [
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Submartingale help
May 6th 2009, 06:18 AM #1
Junior Member
Joined
Nov 2007
Posts
68
Submartingale help
How do i show that $(B_t^2 -t)^2$ is a submartingale w.r.t. the natural filtration generated by $B_t$ , where $B_t$ is a standard Brownian motion started at zero....
Apply Ito's formula to $f(t,B) ... | 5 | [
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0.058837890625,
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0.15234375,
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-0.0... | 29,583 | 29583 | |
Some Curvature Conditions on a Para-Sasakian Manifold with Canonical Paracontact Connection
International Journal of Mathematics and Mathematical Sciences
Volume 2012 (2012), Article ID 395462, 24 pages
http://dx.doi.org/10.1155/2012/395462
Research Article
Some Curvature Conditions on a Para-Sasakian Manifold with C... | 4 | [
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-0.01312255859375,
-0.078125... | 29,584 | 29584 | |
Sorting 10 numbers
1.
Join Date
Feb 2008
Posts
9
Rep Power
0
I'm basically looking for a good algorithm or method to do the following:
I have 10 numbers, you can use List<Integer> or int[] or what ever u want.
I want to sort the 10 numbers so the sum of th... | 4 | [
-0.060302734375,
-0.0027618408203125,
0.01531982421875,
-0.09130859375,
-0.01373291015625,
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0.031494140625,
0.01318359375,
-0.115234375,
0.0125732421875,
-0.05419921875,
0.07080078125,
0.017578125,
0.0196533203125,
-0.09423828125,
0.031982421875,
0.01190185546875,
... | 29,585 | 29585 | |
The Coercion Model
The Coercion Model
The coercion model manages how elements of one parent get related to elements of another. For example, the integer 2 can canonically be viewed as an element of the rational numbers. (The Parent of a
non-element is its Python type.)
sage: ZZ(2).parent()
Integer Ring
sage: QQ(2).p... | 5 | [
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0.010009765625,
-0.000812530517578125,... | 29,586 | 29586 | |
Fraction beginner (or refresher)
June 11th 2008, 07:11 PM #1
Newbie
Joined
Jun 2008
Posts
6
Fraction beginner (or refresher)
I have this problem: 3/4x - 5 = 2/3x
I do not know what to do after I do this:
3/4x - 5 + 5 = 2/3x + 5
3/4x = 5 2/3x
Do I take the 5 and mulitply it with the 2 ... | 4 | [
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0.06640625,
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0.03369140625,
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0.08154296875,
-0.00946044921875,
0.091... | 29,587 | 29587 | |
Get homework help at HomeworkMarket.com
Question
Submitted by
Clay1203
on Sun, 2012-05-06 01:31
due on Thu, 2012-05-10 01:30
answered 1 time(s)
Clay1203 is willing to pay $5.00
Evaluate 5.2 Problem 11
Jim Outfitters, Inc. makes custom fancy shirts for cowboys. The shirts could be flawed in various ways, includi... | 5 | [
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0.091796875,
-0.01031494140625,
-0.027587890625,
0.0615234375,
0.04248046875,
-0.0191650390625... | 29,588 | 29588 | |
Modeling Damped Lyman-alpha Absorbers
Astronomy 626: Spring 1997
In a recent paper, Prochaska & Wolfe (1997) present a kinematic model of damped Lyman-alpha absorbers as thick rotating disks of individual clouds. Their model treats the random velocities of the
clouds and the thickness of the disk as independent pa... | 4 | [
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0.041259765625,
-0.00... | 29,589 | 29589 | |
Which method for solving system of nonlinear polynomials equations?
April 1st 2011, 07:49 AM
Beet
Which method for solving system of nonlinear polynomials equations?
Hello. I have a research project and need to solve the system of nonlinear polynomial equations like that:
1.The polynomial equations have degr... | 5 | [
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0.00982666015625,
-0.107421875,
0.00093841552734375,
0.0888671875,
-0.0277099609375,
-0.0150146... | 29,590 | 29590 | |
Vector problem
Let $ABC$ be a triangle with $AB=\vec{a}$ and $AC=\vec{b}$ and $M\in[BC]$, $\frac{BM} {MC}=k$. $AM= ?$
We have $\overrightarrow{BM}=k\cdot\overrightarrow{MC}$ $\overrightarrow{BM}=\overrightarrow{AM}-\overrightarrow{AB}$ $\overrightarrow{MC}=\overrightarrow{AC}-\overrightarrow{AM}$ Then, $\
overrightarr... | 5 | [
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0.046875,
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-0.017822265625,
... | 29,591 | 29591 | |
Elimination method in non-linear equation
x^2 + y^2 = 25 and x^2 + 7y = 37
multiply the second one with -1 you will have $-x^2-7y=-37$ find the sum of that and this $x^2+y^2=25$ $-x^2-7y+x^2+y^2=27-37$ $y^2-7y+10=0$ $(y-2)(y-5)=0$ $y-2=0...y=2 , y-5=0...y=5$ sub these
values of y in one of the equation $x^2+7y=37$ or ... | 4 | [
-0.0069580078125,
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-0.08154296875,
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0.025390625,
-0.00823974609375,
-0.01531982421875,
0.046630859375,
-0.06591796875... | 29,592 | 29592 | |
more circle questions
Hello, dgenerationx2! Here's #19 . . . 19. $AB$ is tangent to the circle and $AC$ is a secant. . . $AD = 4,\;AC = 9.$ . Find $AB.$ Code: B x * * * - - - - - - * A * * / * * / 4 * * D / * / * * / * *
/ 5 * / * / * * / * * * C * * * Let $AB = x.$ Theorem: If a tangent and a secant are drawn to a cir... | 4 | [
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0.0400390625,
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-0.0537109375,
... | 29,593 | 29593 | |
Confidence Intervals
June 8th 2009, 02:03 PM #1
Confidence Intervals
Need help with these questions please:
1. The mean wing span of a random sample of 35 birds is 186mm and the standard deviation is 28mm. Give the upper limit of a 90% confidence interval for the population mean wing span of birds,
calcu... | 5 | [
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0.07421875,
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0.09716796875,
0.0654296875,
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-0.00811767578125,
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-0.01953125,
-0.03857421875,
0.0164794921875,
0.0225830078125,
-0.0505371... | 29,594 | 29594 | |
Portfolio Optimization – Why do we need a Risk Model
February 26, 2012
By systematicinvestor
In the last post, Multiple Factor Model – Building Risk Model, I have shown how to build a multiple factor risk model. In this post I want to explain why do we need a risk model and how it is used
during portfolio constructi... | 4 | [
0.0283203125,
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0.0159912109375,
-0.00... | 29,595 | 29595 | |
Please Need Help Fast World Problems
December 13th 2006, 10:57 PM
MathIlliterate
Please Need Help Fast World Problems
I am suppose to list variables and give equations. I have six word problems in my homework that I can not seem to figure out I know that of at least 3 that have to use the supply and demand model... | 4 | [
0.031494140625,
-0.029052734375,
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0.03125,
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0.076171875,
0.039794921875,
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0.0220947265625,
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0.0301513671875,
0.00897216796875,
... | 29,596 | 29596 | |
Math Help
May 11th 2009, 04:58 PM #1
Banned
Joined
Aug 2008
Posts
530
Volume
The base of a solid is the region bounded by the parabola $y=\frac {1}{2}x^2$ and the line y = 2. Each plane section of the solid perpendicular to the y-axis is an equilateral triangle. Find the
volume of the solid.
I ... | 5 | [
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-0.12988281... | 29,597 | 29597 | |
easy trig question
How would i solve questions such as sin(x)= $\frac{1}{2}$ or cos(3x)= $\frac{-\sqrt{3}}{2}$without using a calculator. Thanks in advance
$\sin x =-\frac{1}{2}$ first of all , the reference angle is 30 degrees . But sin is negative so it would be in the 3rd and 4th quadrant ie x=210 , 330 for $\cos 3... | 4 | [
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0.046875,
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-0.042724609375,
0.024169921875,
0.0262451171875,... | 29,598 | 29598 | |
Absolute value inequalities.
please check my work if i done correctly. I'm little confused.
Last edited by mr fantastic; February 2nd 2011 at 02:37 AM. Reason: Title.
Remember that $\displaystyle |X| = \sqrt{X^2}$, so I would rewrite this equation as $\displaystyle \sqrt{(2x-6)^2} = \sqrt{(4-5x)^2}$ $\displaystyle (2... | 4 | [
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