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Math Help
December 10th 2007, 09:01 PM #1
Newbie
Joined
Dec 2007
Posts
3
solve
A.2sinx+1=0
B.2cos^2x-1=0
C.3tan^3x-tanx=0
D.2sin^2x=2+cosx
I really need help.. I have my answers here but im not sure if they are correct:
A.x=7/6pi, 11/6pi
B.x=pi/4 7/4pi
C.x=pi/6 7/6pi 2pi pi... | 4 | [
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Rethinking Pythagoras - 4b. Stretching the Truth (Hyperboloid Model)
We define distances and circles in hyperbolic space analogously to how we did on the sphere, and assume that the reader is familiar with the Hyperboloid Model of hyperbolic geometry, in particular,
that we envision it as the points on the upper half o... | 4 | [
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Jacqueline Sheppet's Math 308 Project
Archimedes of Syracuse [287 – 212 BC] was the greatest mathematician of his time, and is still considered one of the greatest mathematicians of all time. His work was both prolific and painstakingly
detailed often ending with the reductio-ad-absurdum proof technique. His ‘method of... | 4 | [
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Math 524, Fall 1996
Nonlinear Optimization
Math 524, Fall 1996
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Table of Contents
• Math524 Info and Syllabus - (Pos... | 4 | [
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Radius from Arc
April 26th 2006, 06:19 AM #1
Junior Member
Joined
May 2005
Posts
60
Radius from Arc
Please Help
If the arc length s and the distance h from the centre point of the associated chord to the arc is known, how do you calculate the radius?
Thank You
askmemath
Please Help
... | 5 | [
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Square Roots Lesson Plans & Worksheets | Lesson Planet
Square Roots Teacher Resources
Find Square Roots educational ideas and activities
Showing 1 - 20 of 1,043 resources
There are many ways to approach finding the rational approximation of an unknown square root. Here is a problem that will help math learners make ... | 4 | [
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Scale model - volume
March 3rd 2010, 07:04 PM #1
Banned
Joined
Jan 2010
Posts
32
Scale model - volume
An artist plans to make a large sculpture of a person out of solid marble. She first makes a small scale model out of clay, using a scale of 1 inch = 2 feet. The scale model weighs 1.3 pounds.
Assumi... | 4 | [
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System of Linear Equations
Introduction:
We are already familiar with solving linear equations of one variable and two variables. The general form of linear equation of one variable is ax + b = 0 where a is not 0 and a and b are real
numbers, and the general form of linear equations of two variable... | 4 | [
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An Improved Direction Finding Algorithm Based on Toeplitz Approximation
Open Access This article is
• freely available
• re-usable
Article
An Improved Direction Finding Algorithm Based on Toeplitz Approximation
*
Author to whom correspondence should be addressed; E-Mail:
dkchenhua@tju.edu.cn
; Tel.: +86-138... | 4 | [
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Can the partial sums of a series be uniformly distributed modulo 1?
up vote 5 down vote favorite
2
Earlier I asked in Is a sequence of the following type uniformly distributed modulo 1? whether the partial sums of the harmonic series is uniformly distributed modulo 1. Here I ask for necessary and
sufficient conditions... | 4 | [
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Area of Trapezium | Formula to Find the Area of Trapezium | Worked-out Examples
Area of Trapezium
Here we will learn how to use the formula to find the area of trapezium.
Area of trapezium ABCD = Area of ∆ ABD + Area of ∆ CBD
= 1/2 × a × h + 1/2 × b × h
= 1/2 × h × (a + b)
= 1/2 (sum of parallel sides) × (perpend... | 4 | [
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49. Sierpinski-like numbers
Problems & Puzzles: Problems
Problem 49. Sierpinski-like numbers
Let's remember some known concepts:
A Sierpinski Number is an odd integer k such that k.2^n+1 is composite for any integer value of n. In 1962, John Selfridge discovered the Sierpinski number k = 78557, which is now believe... | 4 | [
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of Perspective Drawing
University of Utah § Department of Mathematics
High School Program Lecture
□ Andrejs Treibergs
□ University of Utah
□ Department of Mathematics
□ 155 South 1400 East, Rm. 233
□ Salt Lake City, UTAH 84112-0090
□ E-mail address:treiberg@math.utah.edu
Abstract. We prese... | 4 | [
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Ma
Overview of the Ore_algebra Package
Calling Sequence
Ore_algebra[command](arguments)
command(arguments)
Description
• The Ore_algebra package is a collection of commands for doing basic calculations in algebras of linear operators called Ore algebras.
• Examples of Ore algebras are algebras of differ... | 5 | [
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Dyck Paths With No Peaks At Height k
Journal of Integer Sequences, Vol. 4 (2001), Article 01.1.3
Dyck Paths With No Peaks At Height k
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he Casimir Effect
[Physics FAQ] - [Copyright]
Calculation by Don Koks, 2002
Original by Philip Gibbs, 1997
What is the Casimir Effect?
The Casimir effect is a small attractive force that acts between two close parallel uncharged conducting plates. It is due to quantum vacuum fluctuations of the electromagnetic fiel... | 5 | [
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o
Lottery Answer
by James Shapiro
The question I posed in “Financial Calculation Programs” (April, 1998) is whether it is better to take a single lump sum if you win the lottery or 25 yearly checks. The lump sum is only 40% of your
winnings. The first check is for 1/40 of your winnings with the amount increasing by 3... | 5 | [
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The legacy of the Reverend Bayes
February 2000
The legacy of the Reverend Bayes
How do you use inconclusive evidence to assess the probability that a certain event will occur? One method that has become increasingly popular in recent years depends on a mathematical theorem
proved by an 18th Century English Presbyteri... | 5 | [
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volume of cone proving
Member
Registered: 2005-08-25
Posts: 59
Re: volume of cone proving
Member
Registered: 2006-01-25
Posts: 3
volume of cone proving
how to prove that the volume of the cone is 1/3S*H without using any calculus----no intergration!:D
This works just like calculus, except y... | 4 | [
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us
Two focus definition of ellipse
As an alternate definition of an ellipse, we begin with two fixed points in the plane. Now consider any point whose distances from these two points add up to a fixed constant d. The set of all such
points is an ellipse. The two fixed points that were chosen at the start are called t... | 4 | [
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Rate of change problem
June 29th 2011, 12:20 PM #1
Newbie
Joined
Mar 2010
Posts
9
Rate of change problem
the radius of a cone is increasing at a rate of 3 in/sec, and the height of the cone is 3 times the radius. Find the rate of change for the volume of that cone when the radius is 7 inches.
The te... | 5 | [
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Math Practice Problems
MathScore EduFighter is one of the best math games on the Internet today. You can start playing for free!
Domain and Range - Sample Math Practice Problems
The math problems below can be generated by MathScore.com, a math practice program for schools and individual families. References to co... | 4 | [
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triangle + equations
March 27th 2010, 04:36 PM #1
Newbie
Joined
Mar 2010
Posts
3
triangle + equations
This is my problem: We have a triangle ABC, that has a right angle at the vertex C. First we draw the height v from the vertex C, the heigh v intersects the line AB in point D. Now we draw 2
lines fr... | 4 | [
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Cholesky decomposition
CHOLESKY DECOMPOSITION
Book
Matrix LET Subcommands CHOLESKY DECOMPOSITION DATAPLOT Reference Manual March 19, 1997 4-3 CHOLESKY DECOMPOSITION PURPOSE Compute the Cholesky decomposition of a matrix.
2.9 Cholesky Decomposition
Book
2.9 Cholesky Decomposition 89 SAMPLe page from NUMERICAL RECIPE... | 4 | [
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Moment Generating for Normal
August 7th 2009, 01:41 AM #1
Newbie
Joined
Aug 2009
Posts
11
Moment Generating for Normal
Suppose that X~N(Ux,VARx) and that Y~N(Uy,VARy).
1). Write down the moment generating function Mx(t) = E(e^tx) and My(t) = E(e^ty) of X and Y respectively.
2). If X and Y are i... | 5 | [
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abstract algebra: cyclic!
September 19th 2008, 01:46 PM #1
Newbie
Joined
Sep 2008
Posts
3
can someone please help? i'm studying for an exam and i'm stuck on this problem.
Prove that U(2^n) (n>less than 3) is not cyclic.
thanks so much
1)Prove that $5^{2^{n-3}} \equiv 1 + 2^{n-1} ~ (2^n)$ fo... | 4 | [
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IntroductionMethodsLength VariationBaseline RotationGeneralizationSensor FusionEffect of Cardinality DifferencesIrresolvable ConfigurationsResultsVariable BaselineRange FinderPractical CaseConclusionsReferencesFigures
In this article we analyze, from an analytical point of view, the possibilities and limitations of the... | 4 | [
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Mean and Variance
Probability, Mean and Variance
Mean and Variance
The "mean", or "average", or "expected value" is the weighted sum of all possible outcomes. The roll of two dice, for instance, has a mean of 7. Multiply 2 by 1/36, the odds of rolling a 2. Multiply
3 by 2/36, the odds of rolling a 3. Do this for all ... | 5 | [
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0.00160980224609375,
0.01... | 4,727 | 4727 | |
Dumb (but legit) hypathetical Q about rotating weight
10-28-2008 #1
mtbr member
Reputation:
Join Date
Jan 2004
Posts
4,190
Dumb (but legit) hypathetical Q about rotating weight
I just wanted to ask a question about rotational weight. This is hypothetical so bare with me. Lets say we have 3 wheelsets with... | 5 | [
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MMULT function
Returns the matrix product of two arrays. The result is an array with the same number of rows as array1 and the same number of columns as array2.
Syntax
MMULT(array1,array2)
Argument Description Remarks
... | 4 | [
0.060302734375,
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0.01312255859375,
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0.083984375,
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-0.04541015625,
0.08837890625,
-0.0971679... | 4,729 | 4729 | |
Cayley's theorem together with isomorphic groups
September 1st 2009, 03:29 AM
alexandrabel90
Hello!
Can someone explain to me how Isomorphism is linked to cayley's theorem?
Using cayley's theorem, it is stated that ' every group is isomorphic to a group of permutations'
Proof:
Step 1: Let G be... | 4 | [
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0.017333... | 4,730 | 4730 | |
Compute Area from Fixed Sum Cumulative Probability
Problem 331. Compute Area from Fixed Sum Cumulative Probability
In Matlab the code
v = rand(1,3);
v = v/sum(v);
is sometimes suggested as a convenient means of generating three random variables, whose ranges are restricted to [0,1], which have a fixed sum of one. ... | 4 | [
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0.00448608398437... | 4,731 | 4731 | |
Problems on Percentages | Lofoya
PERCENTAGE: IMPORTANT FACTS AND FORMULAE
ABOUT THE PAGE
Percentages and Fractions: Aptitude Tips and Hints, Theory, Facts and Formula
In this section the theory, tips hints and formulae of percentage and fraction, aptitude has been explained with solved examples which will be useful ... | 4 | [
0.06640625,
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-0.007019042... | 4,732 | 4732 | |
Introduction to Abstract Algebra, 4th Edition
Books
• Published: 10 April 2012
• ISBN: 1118135350
• Author(s): W. Keith Nicholson
Praise for the Third Edition
". . . an expository masterpiece of the highest didactic value that has gained additional attractivity through the various improvements . . ." Zentralb... | 4 | [
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Diffrentiation and integration PLEASE HELP
Member
Registered: 2005-08-25
Posts: 106
Re: Diffrentiation and integration PLEASE HELP
Member
Registered: 2005-11-24
Posts: 455
Re: Diffrentiation and integration PLEASE HELP
The first one is 1.165561185 and then my little solar calculator couldn't... | 5 | [
-0.038330078125,
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-0.03393... | 4,734 | 4734 | |
Backpropagation
A single-layer network has severe restrictions: the class
of tasks that can be accomplished is very limited. In this chapter we will focus on feed-forward networks with layers of processing units.
Minsky and Papert (Minsky & Papert, 1969) showed in 1969 that a two layer feed-forward
network can overco... | 4 | [
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0.122558... | 4,735 | 4735 | |
Finding Easter
On this blog, you can learn any number of feats, including determining the day of the week for any date, and more recently, finding the moon phase for any date.
In a recent comment, regular Grey Matters reader Jay suggested mixing the two, and teaching Conway's method for finding Easter in a given year... | 4 | [
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0.03759765625... | 4,736 | 4736 | |
Another Spanning set question
April 29th 2008, 10:54 AM #1
Member
Joined
Jun 2006
Posts
93
Another Spanning set question
Given
x1=[-1 2 3]^T x2=[3 4 2]^T x=[2 6 6]^T y=[-9 -2 5]^T
Is x Є Span(x1,x2)?
I'm not sure where to go with this. It doesn't seem as though x1 and x2 would span R^3 but... | 4 | [
-0.030029296875,
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... | 4,737 | 4737 | |
Why must P_2 have a degree that ≤ 2 for it to be a subspace of P?
October 6th 2011, 07:53 PM
Pupil
Why must P_2 have a degree that ≤ 2 for it to be a subspace of P?
Can anyone please clarify why P_2 must have a degree ≤ 2 for it to be a subspace of P, the vector space of all polynomials?
October 6th 2011, 07:54... | 4 | [
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Introduction to Gradient Descent
In a previous post, I presented (generalized) linear regression from a linear algebra point of view (namely, the “normal equations”) and in this post, I discuss yet another take on the problem, this
time using gradient descent.
Gradient descent isn’t particularly fascinating for this ... | 5 | [
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-0.032470... | 4,739 | 4739 | |
Kids.Net.Au - Encyclopedia > Electromagnetism
Electromagnetism
is a theory unified by
James Maxwell
to explain the interrelationship between
electricity
and
magnetism
. At the heart of this theory is the notion of an
electromagnetic field
.
A stationary electromagnetic field stays bound to its origin. Example... | 4 | [
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0... | 4,740 | 4740 | |
Math Questions
1. If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing
messages, select the forum that you want to visit from the selection below.
... | 4 | [
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Functional
November 7th 2009, 03:54 PM
slevvio
Functional
Hi everyone I was wondering if anybody could help me with this question; I have done the first 2 parts and a seperate 4th part but part 3 is causing me mathematical pain.
Suppose that $f: \mathbb{R} \rightarrow \mathbb{R}$
satisfies $f(t/2) = f(... | 5 | [
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-0.021484375,
-0.07... | 4,742 | 4742 | |
Extended euclidean algorighm question
October 3rd 2009, 10:44 PM #1
Junior Member
Joined
Aug 2008
Posts
44
Extended euclidean algorighm question
I have some confusions about the procedure of extended EQ
say: gcd(81, 57)=3
here is what I did:
81=1*57+24
57=2*24+9
24=2*9+6
9=1*6+3... | 4 | [
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0.0220947265625,
-0.036376953125,
-0.08154296875,
0.0... | 4,743 | 4743 | |
the i*pi=ln(-1) identity
July 30th 2010, 12:51 AM #1
Member
Joined
Sep 2009
Posts
242
Thanks
1
the i*pi=ln(-1) identity
Famously, we have...
$e^{i \pi (2n-1)}+1=0$
where n is any positive integer. This is of course because $\cos{(\pi (2n-1))}=-1$ and $i\sin{(\pi (2n-1))}=0$
My question... | 4 | [
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-0.0234375,
-... | 4,744 | 4744 | |
trigonometric equation
i have tried to use a math program, and the graph looks like this, the red dot are the roots. I think there so many of them
Hello pacmanI can't see how to find the complete solution yet, but the most likely approach is probably to use $\cos(A+B) + \cos(A-B) = 2\cos A\cos B$ on the RHS and say: $... | 5 | [
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-0... | 4,745 | 4745 | |
Electric field calculation
January 7th 2009, 03:38 AM
free_to_fly
Electric field calculation
I'm stuck on this question:
Q: The outer conductor (radius b, length l) of a long cylindrical capacitor is earthed. The inner conductor (radius a, length l) is hollow, insulated and uncharged. A sphere of radius R is... | 5 | [
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-0.1... | 4,746 | 4746 | |
fastest way to factor quadratic
June 30th 2009, 02:37 PM #1
Senior Member
Joined
Jun 2009
Posts
251
fastest way to factor quadratic
What is the fastest possible way to factor a quadratic? Can someone explain to me how to use the guess and check method, and any limitations it may have (e.g. coefficient in... | 4 | [
0.020751953125,
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0.045166015625,
0.03955078125,
-0.002685546875,
0.0250244140625,
0.05419921875,
0.... | 4,747 | 4747 | |
The coefficients-vectors method
http://upload.wikimedia.org/math/7/b...5aea486b5c.png Ok, I understand how to get it this far. But how are they getting this? http://upload.wikimedia.org/math/d/3...b2f3136bae.png
Hello there! I'm not sure what you are trying to do, multiplication or dot product (the single dot usually ... | 4 | [
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0.078125,
-0.06787109375,
0.06298828125,
-... | 4,748 | 4748 | |
Cos rule question
December 19th 2010, 02:53 PM #1
Senior Member
Joined
Jul 2009
From
Melbourne
Posts
272
Thanks
4
Cos rule question
I got this question, I know how to do it but the answer is never right
A weight is hung from two hooks in a ceiling by strings
of length 54 cm and 42 cm, wh... | 4 | [
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0.11865234375,
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0.111328125,
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0.0517578125,
0.0341796875,
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-0.004241943359375,
0.01336669921875,
0.08544921875,
-0.0732421875,
0.050537109375... | 4,749 | 4749 | |
Simoultaneous equations
May 11th 2010, 02:36 AM
darksupernova
Simoultaneous equations
Hey there,
Getting very stuck on solving these, ive tried using substitution but i dont know how to rearrange it...
can you help?
$137.9 = x + \frac{y}{\sqrt{0.05}}$
and
$275.8 = x + \frac{y}{\sqrt{0.007... | 4 | [
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0.06298828125,
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0.0133666992... | 4,750 | 4750 | |
Proposition 22
If as many odd numbers as we please are added together, and their multitude is even, then the sum is even.
Let as many odd numbers as we please, AB, BC, CD, and DE, even in multitude, be added together.
I say that the sum AE is even.
Since each of the numbers AB, BC, CD, and DE is odd, if a unit is s... | 4 | [
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-0.016235351... | 4,751 | 4751 | |
Need help with analytical algorithm for solving 2 Eq sets
I am trying to program a mathematical model in VBA but am not quite sure how to arrive at some of the stages.
The Model
I have to determine a set of numbers {n} with "An", a set of coefficients, that can be stochastic but adhere to the following constraints:
... | 5 | [
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0.037109375,
0.0732421875,
0.054931640625,
-0.046142578... | 4,752 | 4752 | |
JEL Classifications1. Introduction2. Literature Review2.1. First-Order Markov Process2.2. Time-Homogeneity2.3. Macroeconomic Factors3. The Discrete-Time Maximum Likelihood Framework3.1. Time-Homogeneity in Transition Probabilities3.2. Business Cycles in Transition Probabilities3.3. Statistical Measurements3.3.1. Singul... | 4 | [
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-0.0169677734375,
-0.039... | 4,753 | 4753 | |
Exercises in Set Theory and Teen Reminiscences
By fredw on Monday, November 19 2012, 19:55 - Permalink
I recently spent some time to solve some exercises from Thomas Jech's book "Set Theory" and to typeset my solutions. I'm now done with the six first chapters, that is half of the first part of the
book... entitled "... | 5 | [
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0.0108642578125,
-0.043701171875,... | 4,754 | 4754 | |
Mathematical Induction question due in 5hrs could some1 help?
October 27th 2008, 10:28 AM #1
Newbie
Joined
Oct 2008
Posts
15
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 A^n = [ 1 3^n-1 ; 0 3^n ]... | 4 | [
-0.03759765625,
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rapezoid
Trapezoid
A trapezoid is a quadrilateral with one pair of parallel lines
A trapezoid is a quadrilateral with one pair of parallel lines.
Bases
The two parallel lines are called the bases
The Legs
The two non parallel lines are the legs. .
Adjacent Angles of Trapezoid
The angles on the same side of ... | 4 | [
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0.046630859375,... | 4,756 | 4756 | |
Math Help
February 7th 2010, 03:37 PM #1
Member
Joined
Oct 2008
Posts
96
Derivative
What is the derivative?
f(x) = 5 ^ [(x^2)-(2x)+8]
is this correct>
f ' (x) = 5 ^ {[(x^2)-(2x)] * ln(5) * 2x-2 } * 5^8
?
$\frac{d}{dx}5^{x^2-2x+8}=5^{x^2-2x+8}ln(5)(2x-2)$
The derivative of a... | 4 | [
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0.0100708007... | 4,757 | 4757 | |
Column
Back to top of Surface Evolver documentation. Index.
Back to top of tutorial.
Example: Column of liquid solder
Here we have a tiny drop of liquid solder that bridges between two parallel, horizontal planes at z = 0 and z = ZH. On each plane there is a circular pad that the solder perfectly wets, and the
sold... | 4 | [
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... | 4,758 | 4758 | |
DOUBLET ACHROMAT
9.3. DESIGNING DOUBLET ACHROMAT
Designing doublet lens objective is quite complex procedure. The reason is obvious: there is four optical surfaces, whose synergistic effect needs to correct both monochromatic and chrom... | 4 | [
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... | 4,759 | 4759 | |
Quasi-Masked Forcing Kind of Magic Squares
February 2007
Have you ever had trouble remembering how to construct the unique (up to rotations/reflections) 3 by 3 magic square, shown on the left below, featuring the numbers 1 to 9 inclusive? Here's an easy
way to rediscover it. Start with the more "balanced" magic square... | 4 | [
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-0.032470703... | 4,760 | 4760 | |
Inverse of a complex function
October 29th 2012, 05:07 AM #1
Newbie
Joined
Oct 2012
From
London
Posts
3
Inverse of a complex function
hi, i have been set the following problem, where z is a complex number:
What is the domain of the function f(z) = (3z+1)/(z+i) ?
Prove that f, defined in th... | 5 | [
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... | 4,761 | 4761 | |
Word problems on Pythagorean Theorem | Application of Pythagoras Theorem
Word problems on Pythagorean Theorem
Learn how to solve different types of word problems on Pythagorean Theorem.
Pythagoras Theorem can be used to solve the problems step-by-step when we know the length of two sides of a right angled triangle an... | 4 | [
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0.03173828125,
0.056640625,
-0.064453125,
0.055908203125,
-0.039... | 4,762 | 4762 | |
MathGroup Archive: September 2010 [00464]
[Date Index] [Thread Index] [Author Index]
Re: Solving a system of equations without having to define
• To: mathgroup at smc.vnet.net
• Subject: [mg112587] Re: Solving a system of equations with... | 5 | [
-0.103515625,
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0.01940... | 4,763 | 4763 | |
Introduction to MATLAB
Goal
The goal of this tutorial is to give a brief introduction to the mathematical software MATLAB. After completing the worksheet you should know how to start MATLAB, how to use the elementary functions
in ... | 5 | [
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scipy.special.lambertw
scipy.special.lambertw¶
scipy.special.lambertw(z, k=0, tol=1e-8)[source]¶
Lambert W function [R206].
The Lambert W function W(z) is defined as the inverse function of w * exp(w). In other words, the value of W(z) is such that z = W(z) * exp(W(z)) for any complex number z.
The Lamb... | 5 | [
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-0.0115... | 4,765 | 4765 | |
Math Help
September 11th 2007, 06:17 PM #1
Member
Joined
Nov 2006
Posts
142
induction
I have the cartesian product of this:
1 - (1/(k^2)) from k = 2 to n.
I picked random values of n like n = 2, 3, 4.
With n = 2, I have (1 - (1/4)).
With n = 3, I have (1 - (1/4)) * (1 - (1/9)).
Wi... | 4 | [
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-0... | 4,766 | 4766 | |
sigma-algebra in separable space
October 2nd 2013, 11:23 PM #1
Newbie
Joined
Oct 2013
From
Prague
Posts
2
sigma-algebra in separable space
Hi,
I don't know how to prove this exercise, actually I don't even know how to start
Let $(E,d)$ is separable metric space. Prove that its borel $\sigma$... | 5 | [
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Sequences and limits
• 3,5,7,9,11,...
• 1,2,6,24,120, ...
• 1,-1,1,-1,1,...
The elements of a sequence are called the terms.
The 'n-th term' or 'general term' of the first example is (2n + 1).
The sequence is completely determined by this general term. Therefore we write the first sequence as {2n + 1}.
The seco... | 4 | [
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-0.014404296875,
-0.08154296875,
0.01513671875,
-0.075195312... | 4,768 | 4768 | |
Help
Attribute Grammars and Combinatorics
Attribute grammars are a way to express recursively defined properties of structures. In the combstruct package, the structures are generated by combstruct grammars. Typical examples are pathleng... | 5 | [
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0.1015625,
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0.03... | 4,769 | 4769 | |
Re-analysis of the uncertainty of the 0.895 [micro]m diameter (NIST SRM[R] 1690) and the 0.269 [micro]m diameter (NIST SRM[R] 1691) sphere standards.
Link/Page Citation
The uncertainties of the mean diameters of the nominal 1.0 [micro]m SRM[R] 1690 polystyrene spheres ... | 4 | [
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Quick Review 5-4
How much of a solution that is 50% sulfuric acid should be mixed to a solution that is 10% sulfuric acid to obtain 20 gallons of a mixture that is 20% sulfuric acid?
Solution
Write down the meaning of the variables
let x = the ... | 4 | [
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How do I iterate this function using the @@ operator?
I can get the function to iterate as a recursive function by just reevaluating the x := evalf(x-(f1*j-i*g1)/(h*k-i*j), 25); y := evalf(y-(h*g1-f1*j)/(h*k-i*j), 25) portion of the function below but
im trying beneath it to assign it as newt2d so that i can iterate it... | 5 | [
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-0.020996... | 4,772 | 4772 | |
Optimization Problem5
April 9th 2007, 01:50 AM #1
Junior Member
Joined
Nov 2006
Posts
59
Optimization Problem5
A cone-shaped drinking cup is made from a cirular piece of paper of radius R by cutting out a sector and joining the edge CA and CB. Find the maximum capacity of such a cup.
The answer is a... | 5 | [
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Inverse Functions
November 6th 2007, 06:43 AM #1
Member
Joined
Oct 2007
Posts
134
Inverse Functions
Will you please find domain and range of two functions: f(x) = 3x /(x + 2) and
f (x) = -2x / (x-3) , which is the inverse of the first function.
Thank you
the domain of the function is the ran... | 4 | [
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0.01104736328125,
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-0.07... | 4,774 | 4774 | |
probability of two events in a row
how do you calculate two events happening in a row
Last edited by fn686; August 19th 2008 at 07:58 PM.
QUOTE=fn686;175735]Suppose n individuals at the Olympics pass a security checkpoint and each is searched with probability P. If exactly x of n individuals are searched, what is the... | 5 | [
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0.03613... | 4,775 | 4775 | |
[Maxima] Wrong simplification of log(1/z)
Dieter Kaiser drdieterkaiser at web.de
Wed Jul 30 16:26:39 CDT 2008
I would like to show a sample session with the code for the Exponential
Integrals concerning the transformation of the Exponential Integral Ei to
Gammaincomplete and doing the Laplace transform:
(%i22) logex... | 4 | [
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... | 4,776 | 4776 | |
Statistical Treatment of Data
Statistical treatment of data
The Statistical Treatment of Indeterminate Errors
Statistics is the mathematical science that deals with chance variations. We must emphasize at the outset that statistics only reveals information that is already present in a data set. That is, no
new infor... | 5 | [
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0.06298828... | 4,777 | 4777 | |
Deriving the Surface Area of a Cone
DERIVING THE SURFACE AREA OF A CONE
Here's a problem. Given a right circular cone with base radius r and height h, what is its surface area?
There's a page on the Web that shows a way to derive the fo... | 4 | [
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0.00209... | 4,778 | 4778 | |
Maple
The main objects upon which this package operates are the free vector, the PositionVector, the RootedVector, the VectorField, curves, surfaces, and scalar fields. Lists cannot be used in place of
vectors, and scalar fields are ordinary Maple functions and expressions. Information about vector objects - coordinat... | 4 | [
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0.0556640625,... | 4,779 | 4779 | |
MathGroup Archive: May 2005 [00260]
[Date Index] [Thread Index] [Author Index]
Re: Simplifying Log to ArcCos Expressions
• To: mathgroup at smc.vnet.net
• Subject: [mg56901] Re: Simplifying Log to ArcCos Expressions
• From: Paul Abbot... | 5 | [
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0.0... | 4,780 | 4780 | |
Fixed Start/End Point Multiple Traveling Salesmen Problem - Genetic Algorithm - File Exchange - MATLAB Central
MTSPF_GA Fixed Multiple Traveling Salesmen Problem (M-TSP) Genetic Algorithm (GA)
Finds a (near) optimal solution to a variation of the M-TSP by setting
up a GA to search for the shortest route (least distance... | 4 | [
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0.05810546875,
-0.0142822265625,
-... | 4,781 | 4781 | |
STEP Maths I, II, III 1993 Solutions
STEP III Number 11 (not quite complete)
Can anyone finish this off please. Just the very last part is missing.
(i)
(i)
(Original post by brianeverit)
..
It's a ver... | 5 | [
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0.01696777... | 4,782 | 4782 | |
Approximat
In Algorithm 10, we looked at some of the fastest The Convex Hull of a Planar Point Set. We now present an algorithm that gives a fast approximation for the 2D convex hull. The advantage of this
algorithm is that it is much faster with just an
The BFP Approximate Hull Algorithm
Sometimes a good approxima... | 4 | [
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0.00297546386... | 4,783 | 4783 | |
Combinations of Letters
Date: 10/20/98 at 03:04:55
From: Anthony
Subject: General formula for permutations and combinations
To Dr. Math:
I have been set a piece of work involving finding a general rule for
the different number of arrangements that can be made out of people's
names, such as EMMA (12 combinations) an... | 4 | [
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IntroductionPreliminariesNon-metric MDS algorithmsSequence-based localizationAnchor-Free Localization Method in C-WSNCoal mine wireless sensor networksAnchor-free localization algorithm in C-WSNNon-metric MDS algorithm for static router nodesPrecise localization for mobile targets based on N-best SBL algorithmExperimen... | 4 | [
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0.0036773681640625... | 4,785 | 4785 | |
complex no. question no. 6
May 20th 2008, 08:27 PM #1
Member
Joined
Sep 2007
Posts
176
complex no. question no. 6
p302 q19
given
$\frac{1+sinx +icosx}{1+sinx -icosx} = sin x + i cosx$
evaluate:
$(1+sin\frac\pi 5 +icos\frac\pi 5)^5+ i (1+sin\frac\pi 5 -icos\frac\pi 5)^5$
my working
... | 5 | [
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0.011291503... | 4,786 | 4786 | |
factorize
March 5th 2007, 07:03 AM #1
Member
Joined
Mar 2007
Posts
80
factorize
Hi...ive been trying to wrap my head around these equations but just can't seem to get it yet.....heres a few examples:
Factorise completely the following expressions:
1) 4t^2 - 9s^2
2) 3s^3 - 15s^2 - 18s
... | 4 | [
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0.... | 4,787 | 4787 | |
determine values of ω, that satisfy the roots given.....
February 19th 2009, 05:02 AM #1
i have an assignment question hopefully someone can help me with or point me in the right direction....
the question comes in 3 parts.i have done parts (i),(ii) i need to work out the 3rd part(iii).
(ii) if the roots... | 4 | [
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Co-ends as a trace operation on profunctors
up vote 5 down vote favorite
1
The n-lab site on profunctors (http://ncatlab.org/nlab/show/profunctor) describes profunctor composition as using a co-end to "trace out" the connecting variable:
$F\circ G := \int^{d\in D} F(-, d) \times G(d, -)$
Naturally, one could picture... | 4 | [
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0.03833... | 4,789 | 4789 | |
The Greeks, George Boole and Prolog
The Greeks, George Boole and Prolog Follow
... | 4 | [
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... | 4,790 | 4790 | |
Differential equation with initial conditions
Find the unique function $y(x)$ satisfying the differential equation with initial condition, $\frac{dy}{dx}=x^2 y$, $y(1)=1$
I'm guessing I have to solve for y in terms of x, let y = 1 and x = 1, then solve for C? This is what I did: $y = e^\frac{x^3}{3} + C$ Since $y(1)=1... | 5 | [
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-0.047119140625,
0.018066... | 4,791 | 4791 | |
The Mathematica Journal: Volume 9, Issue 1: What's New in
Mathematica 5
What's New in Mathematica 5
Numeric Computations
NDSolve
The function NDSolve has been completely rewritten, resulting in better performance and much greater flexibility. While many of the enhancements are transparent and will benefit all users... | 4 | [
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... | 4,792 | 4792 | |
"Black hole" is the name given to a body that has gravity excessive enough to prevent light from escaping. It does this by pulling in the nether at a velocity equal to or more than "c", the velocity
of light.
The Schwarzschild radius (some spell the name Schwartzschild) shows the necessary specifications for a black ... | 4 | [
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-0.016967773... | 4,793 | 4793 | |
Conics: Ellipses: Word Problems
Conics: Ellipses: Word Problems (page 4 of 4)
Sections: Introduction, Finding information from the equation, Finding the equation from information, Word Problems
• A "whispering room" is one with an elliptically-arched ceiling. If someone stands at one focus of the ellipse and whispe... | 4 | [
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... | 4,794 | 4794 | |
Getting Started (Getting Started with MATLAB)
Getting Started with MATLAB Search  Help Desk
Matrices and Magic Squares
The best way for you to get started with MATLAB is to learn how to handle matrices. This section shows you how to do that. In MATLAB, a matrix is a rectangular array of numbers. Special meaning... | 4 | [
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-0.04541015625,
0.04... | 4,795 | 4795 | |
MathGroup Archive: February 2006 [00626]
[Date Index] [Thread Index] [Author Index]
Re: Limit
• To: mathgroup at smc.vnet.net
• Subject: [mg64712] Re: Limit
• From: Maxim <m.r at inbox.ru>
• Date: Tue, 28 Feb 2006 05:02:15 -0500 (ES... | 5 | [
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Limit w/ Sqrt function in numerator
September 7th 2012, 07:43 PM #1
Member
Joined
Jul 2012
From
United States
Posts
87
Thanks
3
Limit w/ Sqrt function in numerator
$\lim_{x \to inf} \frac{\sqrt {2 + 9x^2}}{5+2x}$
I don't really know how to algebraically simplify the top. I tried to do the di... | 5 | [
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0.0458984375,
0.02392578125,
0.0490... | 4,797 | 4797 | |
Volume question
March 3rd 2010, 07:50 PM #1
Newbie
Joined
Feb 2010
Posts
8
Volume question
I have to find the volume of a pyramid with height h and base an equilateral triangle with side a (a tetrahedron). I know that volume = integral of area, but I'm having trouble coming up with a
formula for the ... | 4 | [
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la
Topic Title: Volt Drop 3 Phase unbalanced Linear : Threading : Single : Branch
Topic Summary:
Created On: 09 December 2013 12:50 PM
Status: Post and Reply
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Print this topic.
Hi all
If i have a 3 Phase distribution circuit which is not b... | 5 | [
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