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Homework Help
Posted by babygirl on Tuesday, September 6, 2011 at 10:50pm.
solve the following equation by clearing fraction want to know if this right
-7/3-5/2x=8+2x
6(-7/3)-(5/2)(6)=6(6)+2x(6)
14x-15=48+12x
14x-12x-15=48+14x-14x
2x-15=48
2x-15+15=48+15
2x=-33
2x/2x=-33/2
x=-33/2
• algebra - PsyDAG, Wedne... | 4 | [
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0.0390625,
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0.04199... | 42,700 | 42700 | |
Inflation
Inflation is one of the most popular methods known for generating an isotropic and homogeneous universe. The basic idea is that the universe, which is expanding now with some time dependent scale
factor a(t), starts expanding faster and faster. Expansion means that the scale factor changes with time, d a(t)/... | 4 | [
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-0.027709... | 42,701 | 42701 | |
Polymath1Wiki
Main Page
From Polymath1Wiki
The Problem
Let [3]^n be the set of all length n strings over the alphabet 1,2,3. A combinatorial line is a set of three points in [3]^n, formed by taking a string with one or more wildcards x in it, e.g.,
$112x1xx3\ldots$, and replacing those wildcards by 1,2 and 3, resp... | 4 | [
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d
I. INTRODUCTION
A. Commutative algebra with three shift parameters on degenerate
B. Gordon filtration and intersection
C. Heisenberg representation of the Macdonald difference operators
D. Ding–Iohara algebra
E. Elliptic deformation
F. Plan of the paper
II. PROOF OF THEOREM 1.5
A. Construction of the algebra
B. Gor... | 4 | [
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The connected components of the free loop space
up vote 5 down vote favorite
3
I am trying to understand the topology (in terms of homology groups) of the free loop space $\Lambda M$ of nice spaces (Complete Riemannian connected finite dimensional manifolds $M$). I see the free
loop space (of H^1 loops) as a Hilbert m... | 4 | [
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0.00448608398437... | 42,704 | 42704 | |
Curve Splitting in the Degeneration Formula for Relative GW Invariants (MNOP II)
up vote 2 down vote favorite
I am attempting to understand and use the degeneration formula for GW invariants as stated in 'Gromov-Witten theory and Donaldson-Thomas theory II' (Maulik, Nekrasov, Okounkov, Pandharipande). The
formula is f... | 4 | [
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-0... | 42,705 | 42705 | |
Vocabulary of 19th Century analytic projective geometry: What are "order" and "dimension"?
up vote 13 down vote favorite
1
I am trying to understand the following introductory passage in an early lecture by the philosopher/mathematician Gottlob Frege because I am interested in how Frege conceived of the role of geomet... | 4 | [
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... | 42,706 | 42706 | |
Make Quick Work Of Impedance Measurements
These simple techniques can be applied to determine the impedance of different lengths of transmission lines, such as coaxial cables, and can be applied to balanced and single-ended lines.
Knowing the impedance of a transmission line can be useful for many design tasks. The li... | 5 | [
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A variation of the Mean Value Theorem
October 30th 2009, 12:39 PM #1
Junior Member
Joined
Oct 2009
Posts
60
A variation of the Mean Value Theorem
Hi, I need help proving this:
Let U be an open set in R^n, f:U--->R be of class C^2 and Gradient of f(a) = 0, a is an element of S contained in U where S ... | 4 | [
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How to Read Motor Datasheets
Introduction
This short article builds on the work we’ve done in modeling DC motors. Here I’ll show you how to turn that knowledge into practice and at the same time, extract useful information from motor
datasheets.
The reason you’ll have to do that exercise is that most motor manufactu... | 4 | [
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Volume 24,
Volume 24, Issue 11, November 1983
•
View Description Hide Description
We present a generalization of the BCH formula, exp Δ exp Γ=exp(Δ+Γ+ (1/2)[Δ,Γ]+⋅⋅⋅), involving n factors on the right, linear in Δ and to all orders in Γ. The result is applicable to coset
geometries involving Z [ n ] g... | 4 | [
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Math Forum: Teacher2Teacher - Q&A #18119
Teacher2Teacher Q&A #18119
Teachers' Lounge Discussion: "Bottoms up" as a method to factor trinomials
... | 4 | [
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0.130859375,
0.09130859... | 42,711 | 42711 | |
Number of spanning trees of a quotient graph
up vote 9 down vote favorite
2
Let $G$ be a finite connected graph on a $2m$-element vertex set $V$. For any graph with vertices $u,v$, let $\mu(u,v)$ denote the number of edges between $u$ and $v$. Suppose that $G$ has an
automorphism $f$ that is a fixed-point free involut... | 4 | [
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Different Approach to a Set of Equations
Date: 11/13/2002 at 21:29:56
From: Kyle Hammock
Subject: System of Equations
Our teacher gave us a bonus question. It contains a system of
equations with four variables. No one in our class has answered it
yet. It is:
The sum of four numbers is 22. The first number is twice ... | 4 | [
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Fourier transform of exp(-||x||_p): more general question
up vote 8 down vote favorite
1
David Corfield asked the following questions yesterday: Is the n-dimensional Fourier transform of exp(-||x||) always non-negative, where ||.|| is the Euclidean norm on R^n? What is its support?
I want to ask a more general questi... | 4 | [
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isosceles theorem?
October 10th 2008, 11:34 PM #1
Junior Member
Joined
Oct 2008
Posts
38
isosceles theorem?
I have two isosceles triangles that have the same base length, x.
For one of the isosceles triangles, the sides opposite the base angles have length sqrt(11).
For the other isosceles triang... | 4 | [
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-0.0... | 42,715 | 42715 | |
Mathematical Curve Conjectures
Summary
In this activity, a six-foot length of nylon rope is suspended at both ends to model a mathematical curve known as the hyperbolic cosine. In a write-pair-share activity, students are asked to make a
conjecture concerning the nature of the curve and then embark on a guided discov... | 4 | [
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0.0074... | 42,716 | 42716 | |
Math Help
December 23rd 2009, 07:22 AM #1
Member
Joined
Oct 2009
Posts
202
Progressions
The sum of the first 3 terms of a geometric progression is 13 times its first term.Find the possible values of the common ratio of the geometric progression.
HI
$S_3=13a$ , where a is the first term
$\... | 4 | [
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-0.0693359375,
... | 42,717 | 42717 | |
Math Forum Discussions
Re: Why study Egyptian fraction math?
Posted: Nov 11, 2012 12:10 PM
C. A confirmation of the Kahun Papyrus arithmetic progression method must include discussions of RMP 40 and RMP 64. In RMP 64 Ahmes asked 10 men to share 10 hekats of barley with a differential of 1/
8 defining an arithmetical p... | 5 | [
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0.00946044921... | 42,718 | 42718 | |
Predual of a Direct Sum of Banach Spaces
up vote 3 down vote favorite
This may be basic, and if it is I apologize, but I have found no references to it in literature. I would appreciate a reference at least if I am wrong. I have supplied background for those
interested, but you are more than welcome to skip it - I hav... | 4 | [
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... | 42,719 | 42719 | |
solve system of equations using row operations on augmented matrix
May 3rd 2013, 07:33 PM
irv1234
solve system of equations using row operations on augmented matrix
Hey guys I really need some help on solving 2 algebra problems.
The question states: Solve the system of equations using row operations on the ... | 5 | [
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-0.0240478... | 42,720 | 42720 | |
Is $\omega$ absolute in set theory without foundation?
up vote 2 down vote favorite
Let $\text{ZF}^-$ be the set theory without powerset, choice, and foundation. Consider the following notions:
• Wellfounded sets $$WF(c) \Leftrightarrow (\forall x \subseteq TC(c)) \left[x \neq \emptyset \rightarrow (\exists y \in x... | 4 | [
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... | 42,721 | 42721 | |
Level sets of Morse functions
up vote 21 down vote favorite
9
Every compact two dimensional manifold admits a Morse function such that any its regular level set is at most two circles. I am interested in a generalization of that phenomenon.
Does there exist a finite collection of compact manifolds of dimension $n$ su... | 5 | [
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geometric sequences
April 12th 2007, 04:59 AM #1
Newbie
Joined
Apr 2007
Posts
5
show why
(r^(n+1)-1)/(r-1) = the sum (between k=0 and n) of r^k = Sn (The n in Sn is lower than the S)
he hints to multiply by r-1 or use long division
then I'm supposed to use part to show why
the sum K=0 to... | 4 | [
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I'm alive, I'm alive, but I'm sinking in! No Drama / Drama!
I’m alive, I’m alive, but I’m sinking in! No Drama / Drama!
The worst thing ever is when I look back at when I last posted, and it’s over a month ago. Shame on me. After spending all that time trying to inspire others to post semi-regularly, I have fallen
ami... | 4 | [
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0.0222... | 42,724 | 42724 | |
Definition of Parallax
What Is Parallax – Definition of Parallax
Access list of astrophysics formulas download page:
What is Parallax?
Before answering this question, we point out that the main objective in astronomy and astrophysics in studying parallax is to understand how it can be used to measure distances ... | 4 | [
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-0.01416015625,
-0.0303955078125,
0.007293701171875,
-0... | 42,725 | 42725 | |
Proof that bases etc. exist in early linear algebra course?
up vote 10 down vote favorite
4
I'm currently struggling to teach a 2nd course on linear algebra (in the UK, not at an Oxbridge quality university: the students have done a 1st course which concentrated upon algorithms you can
apply to matrices, and calculati... | 4 | [
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-0.02099609375,
-... | 42,726 | 42726 | |
Is there such a thing as the sigma-completion of a Boolean algebra?
up vote 1 down vote favorite
1
Hi all,
Suppose that $\mathcal{B}$ is a Boolean algebra. It there a way to extend $\mathcal{B}$ to a smallest Boolean algebra $\mathcal{B}'$ that contains an isomorphic copy of $\mathcal{B}$ and is countably
complete, i... | 4 | [
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... | 42,727 | 42727 | |
How to do asymptotics for integrals?
up vote 3 down vote favorite
What's a good way to find how fast the integral of a function is growing near a pole of the function? Here is what I mean on an example.
Look at 1/z. If I want to find out how fast ∫[0]^a 1/(z-ε)dz is growing when ε->0, ε∈C, I can do this:
∫[0]^a 1/(z... | 5 | [
0.002410888671875,
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0.046142578125,
0.0213623046875,
-0.00250244140625,
-0.04345703125,
-0.00016307830810546... | 42,728 | 42728 | |
Ratio and Proportion
March 13th 2013, 09:31 AM #1
Newbie
Joined
Feb 2013
From
India
Posts
17
Ratio and Proportion
If $\frac{x}{(b+c-a)}=\frac{y}{c+a-b}=\frac{z}{a+b-c}$ Prove that (b-c)x+(c-a)y+(a-b)z=0
If we add the numerator parts and denominator parts we get : $\frac{x+y+z}{a+b+c}$ Can we do ... | 4 | [
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We're going to go for a drive.
We'll graph speed versus time. We have kilometers per hour vertically, and hours horizontally. We've also got a speedometer—how fast—and an odometer—how far.
Suppose we drive for half an hour at 50 km/h.
We end up driving for 25 km. This is the area of spanned by the two lengths: $ 50... | 4 | [
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0.0... | 42,730 | 42730 | |
Real and virtual images. Image formation by lenses, plane mirrors, concave and convex spherical mirrors. Graphical methods for locating images. Lensmaker’s equation.
SolitaryRoad.com
Website owner: James Miller
[ Home ] [ Up ] [ Info ] [ Mail ]
Real and virtual images. Image formation by lenses, plane mirrors,... | 4 | [
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Trigonometric inequalities
Determination of base or fundamental interval is central to solve trigonometric inequality. The function values in this interval is repeated with a periodicity of trigonometric function. The base
interval depends on the nature of trigonometric function and inequality in question. The steps to... | 4 | [
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-0.02990722656... | 42,732 | 42732 | |
Spatial effects on plant population dynamics and spatial modelling: Tutorial - Microsoft Research
Spatial effects on plant population dynamics and spatial modelling: Tutorial
What determines the abundance of plants of a given species living in a certain area? You should be able to list a number of factors that probabl... | 5 | [
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Please explainhow did he simplified this given?
January 31st 2010, 02:14 AM #1
Newbie
Joined
Sep 2009
Posts
3
Please explainhow did he simplified this given?
Hi, Can you please show me the step-by-step process of this example. Especially the second and third line?
Here is the given:
$(xy-x)dx=(... | 4 | [
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Tricky integration, possibly Integration Factor
May 23rd 2009, 08:12 AM #1
Tricky integration, possibly Integration Factor
Hi, for this problem I would normally use the Integration factor, but as it's $y^2$ I'm not too sure what to do.
$x\frac{dy}{dx} - y^2 = 4$
Have divided through by x, as I would nor... | 5 | [
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0.078125,
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Optimal auction for risk-averse seller
up vote 2 down vote favorite
Consider an auction of a single unit of indivisible good. There are $n$ buyers whose values of the object is drawn independently from the uniform distribution on $[0,1]$. The buyers have interim
linear utility:
$$ u_i(k(\hat{\theta}), t(\hat{\theta})... | 5 | [
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Probability Question
01-20-2006 03:00 PM #2
01-20-2006 01:53 PM #1
Posts
3
Thanks
0
Thanked 0 Times in 0 Posts
Probability Question
Hi can you help me with this problem please. a bank claimed 40% of its customers use internet banking. in random checks they found 170 of the 500 customers used inte... | 4 | [
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Need help with 2 probabilty questions:
October 22nd 2008, 08:48 PM #1
Newbie
Joined
Oct 2008
Posts
4
Need help with 2 probabilty questions:
1. If a population has a mean income of $50,000 with a standard deviation of $4000, what is the probability of selecting a random same (n=400) from this population t... | 4 | [
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Hinge Theorem
Date: 12/12/2000 at 18:54:06
From: Gina
Subject: Proofs in geometry
How would you write a proof for the Hinge theorem?
Date: 12/13/2000 at 05:10:36
From: Doctor Floor
Subject: Re: Proofs in geometry
Hi, Gina,
Thanks for writing.
Hinge Theorem:
If of triangle ABC and A'B'C' sides AB = A'B' and AC ... | 4 | [
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3-maniflod in R^3
December 20th 2012, 06:27 AM
vercammen
3-maniflod in R^3(Munkres. Chapter 7. Paragraph 37. Problem 5)
The $3-$ball ${B_R}^3 = \{(u,v,w) \in \mathbb{R}^3 | u^2+v^2+w^2 \le R^2\}$ is a $3-$ manifold in $\mathbb{R}^3$;
orient it naturally and give
${S_R}^2 = \partial {B_R}^3 = \{ (u,v,w)\... | 5 | [
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-0.0864257812... | 42,740 | 42740 | |
Total relations between sets proof
November 14th 2011, 03:15 PM #1
Member
Joined
Sep 2010
Posts
151
Thanks
1
Total relations between sets proof
Question: Suppose a set A has n elements and a set B has m elements. Prove that there are 2^m*n different relations from A to B
Now i see how this works... | 4 | [
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0.051025390625,
-0.0649414... | 42,741 | 42741 | |
Computability Theory
April 25, 2014
For anything past March 18, 2008, see here.
March 13, 2008
Given any complete, consistent extension $T$ of ${\sf PA}$, we showed that there is a minimal model $K_T$ of $T$. This model is unique up to (unique) isomorphism, it is rigid (i.e., it has no
automorphisms other than the i... | 4 | [
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0.006988525390625,
... | 42,742 | 42742 | |
Cramer-Rao lower bound for Binomial dist
August 7th 2009, 05:01 AM #1
Junior Member
Joined
May 2009
Posts
25
Cramer-Rao lower bound for Binomial dist
I have a random variable X, with $Bin(12,\theta)$ distribution.
I take n samples of this r.v., all independent, with distribution $Bin(12,\theta)$, an... | 5 | [
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-0.02... | 42,743 | 42743 | |
Product Differentiation
March 27th 2009, 10:52 AM #1
Newbie
Joined
Feb 2009
From
Phoenix
Posts
6
Product Differentiation
This is a homework problem on the Algebra of Derivatives section in my text. I'm not sure if I'm handling the $f(x^3)$ part correctly. Any suggestions (or if it's right, let me kno... | 5 | [
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0.06787109375... | 42,744 | 42744 | |
Linear Programming
In my last post on game theory, I said that you could find an optimal
probabilistic grand strategy for any two-player, simultaneous move, zero-sum game.
It’s done through something called linear programming. But linear programming
is useful for a whole lot more than just game theory.
Linear programm... | 4 | [
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... | 42,745 | 42745 | |
Cassini formula for Fibonacci numbers
Giovanni Cassini. Born: 8 June 1625 in Perinaldo, Republic of Genoa (now Italy). Died: 14 Sept 1712 in Paris, France.We know little of his parents but certainly his father was a Tuscan. In fact
Giov... | 4 | [
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Given set M = {x natural/ (x+7)C(x+3) = 3(x+5)A2}, M is:
A. M = nul set
B M include in (2,5]
c. M include in (5,10]... - Homework Help - eNotes.com
Given set M = {x natural/ (x+7)C(x+3) = 3(x+5)A2}, M is:
A. M = nul set
B M include in (2,5]
c. M include in (5,10]
d. M include [0,2]
You need to use the following fa... | 5 | [
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0.02197265625,
-0.028564453125,
0.04589... | 42,747 | 42747 | |
Determining if a function is differentiable
October 1st 2009, 10:19 PM #1
Junior Member
Joined
Sep 2009
Posts
62
Determining if a function is differentiable
I can't figure out how to do this at all. Basically...the GRAPH looks differentiable, and I know from my book that $g(x) = (x + |x|)^2 + 1$ is diffe... | 4 | [
0.006195068359375,
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0.05590... | 42,748 | 42748 | |
Investment average rate increase?
August 24th 2008, 04:39 PM
overduex
Investment average rate increase?
An investment of $1000 increases 16% each year. Find the average rate at which the investment has grown over the first 5 years.
I have already found the amount after the first year is $1160, and after the... | 4 | [
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-0.0301513671875,
-0.... | 42,749 | 42749 | |
bl
Zentralblatt MATH
Publications of (and about) Paul Erdös
Zbl.No: 100.27104
Autor: Erdös, Pál
Title: On a problem of S.W.Golomb. (In English)
Sou... | 4 | [
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-0.058349609375,
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Decomposition of order-3 tensors over the complex numbers
up vote 1 down vote favorite
1
This is a question about decomposition of order-3 tensors. The survey Tensor Decompositions and Applications give a good account of recent developments in this area.
Let $T$ be an order-3 tensor, i.e., the number of indices for e... | 5 | [
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0.080078125,
-0.0019683837890625,
-0.039794921875,
-0.00640869140625... | 42,751 | 42751 | |
Homework Help
Posted by raven 31791 on Wednesday, March 7, 2007 at 11:55am.
The sq root of -4 (3-sq root of -9)
a)6 +6i
b)-6+6i
c)6-6i
d)-6-6i
Again the i's are in italics. I would think that c and d could be eliminated because the answer is suppose to be in the form a + bi but they could be trting to trick you.
... | 4 | [
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0.0283203125,
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-0.01275634765625,
-0.0908203125,
... | 42,752 | 42752 | |
Business Math
Posted by Liz on Sunday, January 29, 2012 at 2:08pm.
Joyce took out a loan for $21,900 at 12 percent on March 18, 2000, which will be due on January 9, 2001. using ordinary interest, Joyce will pay back on January 9 a total amount of:
Answer: $24,068.10
Ordinary interest is 360
March 18 = 77 days
Jan... | 4 | [
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-0.0037078857421875,
0.0262451171875,
-0.0854492... | 42,753 | 42753 | |
Flow of evolutionary vector fields
up vote 0 down vote favorite
1
Consider a smooth vector bundle $\pi: E\rightarrow M$, the associated infinite jet bundle $J^\infty(\pi)$, and evolutionary vector fields $\partial_\varphi = \sum_{i,\sigma}(D_\sigma\varphi^i)\frac{\
partial}{\partial u^i_\sigma}$. Here $D_\sigma$ is th... | 4 | [
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-0.078125,
0.07470703125,
... | 42,754 | 42754 | |
Paramatric equations and LOCUS!!!!
September 28th 2009, 04:25 AM #1
Member
Joined
Dec 2008
From
Australia
Posts
161
p is a variable point on the parabola x^2 = -4y. The tangent from P cuts the parabola x^2 = 4y at Q and R. Show that 3x^2 = 4y is the equation of the locus of the midpoint of the chord R... | 4 | [
0.025146484375,
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0.0966796875,
-0.003692626953125,
0.07763671875,
-0.0116577148437... | 42,755 | 42755 | |
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Topic: [ap-calculus] Going crazy
Replies: 1 Last Post: Oc... | 4 | [
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Line integral problem
December 10th 2010, 12:08 PM #1
Member
Joined
Sep 2009
Posts
149
Line integral problem
I cant seem to get this problem right:
from what i understand, you solve these with respect to x and y by parameterizing the curve which gets me for the first part r(t)=<sqrt(2)t,0> and r'(t... | 5 | [
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inductive logic
Max,
I want to run something by you to get your opinion. The KCA and fine-tuning arguments are presented as philosophical/logical arguments with some scientific premises. Some skeptics that don’t
like philosophy will dismiss it and appeal to scientism.
But if we look at something lik... | 4 | [
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Can the difference of two distinct Fibonacci numbers be a square infinitely often?
up vote 27 down vote favorite
10
Can the difference of two distinct Fibonacci numbers be a square infinitely often?
There are few solutions with indices $<10^{4}$ the largest two being $F_{14}-F_{13}=12^2$ and $F_{13}-F_{11}=12^2$
... | 5 | [
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a few algebra 2 and geometry word problems
March 29th 2008, 08:22 AM #1
Newbie
Joined
Mar 2008
Posts
16
a few algebra 2 and geometry word problems
here are some word problems that if you could help would be great! you don't have to do all of them either if you don't want to or are unable too.
a) fra... | 4 | [
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Brain Thinkers
November 24th 2008, 09:45 PM #1
Junior Member
Joined
Feb 2008
From
Victoria
Posts
39
Brain Thinkers
Could I please have some help with these 2 questions?
1. In a maths competition with 15 questions, 6 marks are given for each correct answer, 0 marks for each wrong answer and 3 mark... | 4 | [
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Transforming a differential equation into another differential equation
May 8th 2011, 07:40 AM
Basheesh
Transforming a differential equation into another differential equation
1. The problem statement
$m\frac{d^{2}x}{dt^{2}}+c\frac{dx}{dt}+kx=F_{0}cos \omega t \\\\LC\frac{d^{2}V_{c}}{dt^{2}}+RC\frac{dV_{c}}... | 4 | [
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Math Help
February 13th 2008, 05:21 PM #1
Junior Member
Joined
Feb 2008
Posts
37
More Proofs
I have three proofs that I am not really sure how to do. I will provide you with what I have so far, if you could please fill in the holes that would be great.
1) Prove that the product of two consecutive i... | 4 | [
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Abel summation of the alternating series of primes?
up vote 9 down vote favorite
2
Consider the ordinary generating function of the sequence of primes ($2+3x+5x^2+7x^3 + ...$); by the ratio test and the prime number theorem, its radius of convergence is $1$. Thus, we might well ask
about the limit of its value as $x$ ... | 5 | [
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Trigonometry, Stationary Points and the Second Derivative
April 7th 2008, 03:34 PM
Flay
Trigonometry, Stationary Points and the Second Derivative
I'm having trouble getting the answer to this particular question out;
Given that the $\frac{d^2y}{dx^2}$ is equal to $9\sin3x$;
1. Find y if there is a stat... | 5 | [
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Te
Liftoff to Learning: Tethered Satellites
Video Title: Tethered Satellites Subjects:... | 4 | [
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paper
Cornwell 1
Paul Cornwell
March 25, 2011
MAT 5900- Monte Carlo Simulations
Professors Frey and Volpert
Necessary Sample Size for Good Central Limit Theorem Approxima... | 4 | [
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Galois Theory: Inseparable and Separable elements of a field K.
September 9th 2011, 09:44 PM
fatpolomanjr
Galois Theory: Inseparable and Separable elements of a field K.
Problem: If $u \in F$ is separable over field $K$, where $F$ is an extension of $K$, and $v\in F$, then $K(u,v) = K(u+v)$. If $u, v eq 0$, then... | 5 | [
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Drag coefficeant rearranging equations problem
January 16th 2010, 10:13 AM
tomarsawrous
Drag coefficeant rearranging equations problem
Hi all, thanks for you time...
I'm trying to work out how the answer for this problem is obtained:
Q. The drag coefficient for an aircraft is reduced by streamlining.
... | 4 | [
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Lagrange Multiplier Maximization Problem
March 29th 2010, 05:48 PM #1
Junior Member
Joined
Sep 2009
Posts
29
Lagrange Multiplier Maximization Problem
This is an example problem our professor gave us but after getting the partials, it jumps right to the answer for x and y. Is solving this problem just a m... | 5 | [
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How to do (m)Gram-Schmidt orthogonalization with integers ? (real life problem) ("mathematicalized reformulation")
up vote 2 down vote favorite
New edition of the question, "mathematicalized" (thanks to Gerhard).
Consider and integer valued n*n matrix M, with integers elements in the range -N < m < N. I want to find ... | 4 | [
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[SciPy-user] Peak Fitting
Steve Schmerler elcorto at gmx.net
Fri Mar 31 00:59:28 CST 2006
Christian Kristukat wrote:
> basvandijk at home.nl wrote:
>
>>Hello,
>>
>>I would like to integrate some data. The data has a somewhat similar form as the
>>picture of the peak in [1]. I think a good function describing the dat... | 5 | [
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[SOLVED] Volume of a cylinder
March 6th 2010, 09:32 AM #1
[SOLVED] Volume of a cylinder
I really dont know what im doing wrong. My online homework says this is wrong but im really sure its right
Can someone look this over for me. Thank you
The region bounded by
Using cylindrical shells, set up an in... | 4 | [
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0.0... | 42,773 | 42773 | |
direct sum
December 16th 2013, 01:03 PM #1
Newbie
Joined
Dec 2013
From
philippines
Posts
8
show that if f is in Hom(U,U) such that f^2=f then V= ker f + ker(f - id[v]). also let B[0 ]be an ordered basis For ker f and B1 be ordered basis for ker(f-idv). if B is an ordered basis and B=B
[0] + B[1] f... | 5 | [
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Zeta-function regularization
Another blog post: When you're finished with this blog entry, continue with a more detailed one: Why the sum of integers is equal to –1/12
A typical example of a mathematical fact that the anti-talents in theoretical physics can't ever swallow are the identities that appear in various ... | 5 | [
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Singular points and the method of Frobenius
[Notes on Diffy Qs home] [PDF version] [Buy cheap paperback version]
[next] [prev] [prev-tail] [tail] [up]
7.3 Singular points and the method of Frobenius
Note: 1 or 1.5 lectures , §8.4 and §8.5 in [EP], §5.4 – §5.7 in [BD]
While behaviour of ODEs at singular points is mo... | 5 | [
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How do you prove that [3,4)~[3,4)\{pi} ?
Can anyone provide a proof, plz? I need to understand how the proof works, 10x in advance...
Let $a = \pi-3$ and let $A = \left\{3+\frac{a}{2^n}\;\middle\vert\; n\in\mathbb{N}\right\}$ where $\mathbb{N}=\{0,1,2,\dots\}$. In particular, $\pi\in A$. Then we can construct $f:A\to... | 5 | [
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Matrix Multiplication
How to multiply a 1x3 row by a 3x1 column with the row on the left.
Similarly we can multiply a 1xn row by a nx1 column.
Examples:
We can multiply any mx3 matrix by a 3x1 column by multiplying each row of the mx3 by the 3x1 column. Row 1 of the mx3 multiplied by the column gives... | 4 | [
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Modelling approach to simulate reductions in LDL cholesterol levels after combined intake of statins and phytosterols/-stanols in humans
Abstract
Background
To examine the effects on LDL cholesterol of the combined use of statins and phytosterols/-stanols, in vivo studies and clinical trials are necessary. However, f... | 4 | [
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splash
The Donut Selectivity Model for Fish Fee
Start Model
Read Background
el for Fish Feeding
Enter Predator Name
Predator
Enter Number of Prey
7
Note Major Factors or Considerations of the Predator
none
Done
Redo
Please use your mouse to move from textbox to textbox... | 4 | [
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Example: Symbolic Algebra
Next: Modularity, Objects, and State Up: Systems with Generic Operations Previous: Combining Data of Different
Example: Symbolic Algebra
The manipulation of symbolic algebraic expressions is a complex process that illustrates many of the hardest problems that occur in the design of la... | 5 | [
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Could someone tell me how to set this up?
November 9th 2009, 10:59 AM #1
Newbie
Joined
Oct 2009
Posts
6
Could someone tell me how to set this up?
1. Lisa's parents figure she needs $20,000 when she starts college in 5 years. How much must they invest now in an account paying 4% compounded quarterly so th... | 4 | [
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Degree of fibers with too large dimension
up vote 1 down vote favorite
Background:
Let $\mathbb{F}$ be an algebraically closed field. Let $X \subset \mathbb{F}^n$ be an affine variety. Let $\pi(X)$ be the projection of $X$ to the first $m < n$ coordinates, $$ \pi(X) = \{(x_1,\
ldots,x_m): x \in X\}, $$ and for a poin... | 4 | [
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[SOLVED] Can't Figure out this simplification
March 21st 2009, 08:53 PM #1
Newbie
Joined
Sep 2008
Posts
22
[SOLVED] Can't Figure out this simplification
I came across a math related problem in my science text book I can't figure out on my own.
The first part of the problem has led me to this equatio... | 5 | [
0.0230712890625,
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0.00537109375,
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0.08837890625,
0.1025390625,
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-0.1025390625,
... | 42,784 | 42784 | |
Logs
May 15th 2008, 06:51 PM
RFB4191
Logs
So I have this equation:
(1/27)^(x-1) = 3 times cubed root of nine
I need to solve for x this using logs...
Any thoughts?
May 15th 2008, 06:59 PM
Mathstud28
Quote:
$\bigg(\frac{1}{27}\bigg)^{x-1}=\frac{1}{27^{x-1}}=\frac{1}{3^{3x-3}}=3^{-(3x-3... | 4 | [
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-0.0012664794921875,
... | 42,785 | 42785 | |
Longfellow's Bees
Date: 08/01/2002 at 05:57:08
From: Eliza
Subject: Henry Wadsworth Longfellow
Bees are let out of a hive. One-fifth of the bees fly to the rosebush,
one-third fly to the apple tree, and three times the difference
fly to the acorn tree. One bee is left flying around. How many bees
are there altogether... | 4 | [
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-0.01348876953125,
-0.0625,
-... | 42,786 | 42786 | |
Factoring large primes
October 4th 2009, 05:55 PM #1
Member
Joined
May 2008
Posts
87
Factoring large primes
How can I use these facts:
880525^2 = 2 (mod 2288233)
2057202^2 = 3 (mod 2288233)
648581^2 = 6 (mod 2288233)
668676^2 = 77 (mod 2288233)
to factor 2288233 ?
You have sup... | 4 | [
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-0.037841796875,
... | 42,787 | 42787 | |
Frustum of a Pyramid with a Rectangular Base
Date: 02/20/2002 at 12:42:03
From: Brad Nelson
Subject: Frustum of a pyramid with rectangular base
Back in 2000 you gave a solution you derived using calculus to
someone wanting to know how to figure the volume of a rectangular
based frustum of a pyramid see:
Volume o... | 5 | [
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-0.0751953125,
0.0461... | 42,788 | 42788 | |
Formal Definition of a Limit
Date: 10/17/2001 at 13:31:45
From: Rebecca Klusman
Subject: Calculus - the definiton of a limit
Could you please explain to me the formal definition of a limit. I
need help specifically with finding a delta for a given epsilon and
using the epsilon-delta definiton of a limit. The problem... | 5 | [
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0.0147705078125,
-0.022094726... | 42,789 | 42789 | |
Homework Help
Posted by George A.J on Monday, January 31, 2011 at 11:22pm.
Find the slope m of the tangent line to the graph of the function at the given point and determine an equation of the tangent line.
f(x) = 7 x - 2 x^2 text( at ) \(-1,-9\)
m =
y =
• Calculus - Damon, Tuesday, February 1, 2011 at 10:10am
... | 4 | [
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-0.044189453125,
-0.0... | 42,790 | 42790 | |
vector help
May 1st 2010, 09:57 AM #1
Super Member
Joined
Sep 2008
Posts
607
vector help
AB is a diameter of a circle centred at the origin O, and P is any point on the circumference of the circle.
Using the position vectors of A, B and P, prove (using a scalar product) that AP is perpendicular to BP... | 4 | [
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0.0478515625,
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0.050048828125,
-0.00726318359375,
0.04858398... | 42,791 | 42791 | |
Homework Help
Posted by Lyanne on Saturday, October 15, 2011 at 8:39pm.
Given the function: f(x)=x^3-4x^2+6x-3
a) Find the average rate of change of the function on the interval [2,4]
b)find the instantaneous rate of change of the function at x=3.
• calculus - Reiny, Saturday, October 15, 2011 at 10:02pm
whe... | 4 | [
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-0.000051021575... | 42,792 | 42792 | |
Submarine Automatic Control
Dr Peter Ridley Julien Fontan and Dr Peter Corke
School of Mechanical Engineering, CSIRO Manufacturing Science and Technology,
Queensland University of Technology, QCAT PO B... | 4 | [
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Bounding a smooth function near the endpoint
up vote -1 down vote favorite
Let $\Omega=(a,b)$ a finite interval, $g\in \mathcal{H}^k(\Omega)$ some integer $k$, with $g(a)=0$ and let $\epsilon>0$. Is there an $\alpha\geq 1+k$ such that:
$ \left\|g\right\|_{L_2(a,a+\epsilon)}\leq C\epsilon^{\alpha}\left\|g\right\|_{\ma... | 5 | [
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0.0216064453125,
0.006011962890... | 42,794 | 42794 | |
Uniquely Determining a Polygon
Date: 02/05/2001 at 04:29:22
From: Gaston
Subject: Polygon area and shape
I am trying to prove whether a polygon is uniquely determined if the
following parameters are known:
- area of the polygon
- number of sides of the polygon
- length of each side of the polygon
- whic... | 5 | [
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... | 42,795 | 42795 | |
A proof involving logs
Can anyone show that: log(N-1)! $\leq$$\int_1^N \! log(x) \, dx$$\leq$ log(N)!
$\log (n!) = \log n(n-1)(n-2)\cdots2\cdot1 = \log n + \log (n-1) + \cdots + \log 2$. This is a Riemann sum for the integral $\int \log x$. Can you show that the Riemann sum on the left of your
inequality is less than ... | 4 | [
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-0.039794921875,
0.0299072265625,... | 42,796 | 42796 | |
Applications of Vector Addition
February 14th 2010, 01:12 PM
sam314159265
Applications of Vector Addition
Hi, just wondering if anybody could help me with the following vector word problem.
An airplane is flying at 550 km/h on a heading of 080 degrees. The wind is blowing at 60 km/h from a bearing of 120 de... | 5 | [
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0.019... | 42,797 | 42797 | |
Taylor theorem
Please help me out with this problem. Prove the given equation using Taylor series theorem. $sin^{-1}\frac{2x}{1+x^{2}}=2\left \{ x-\frac{x^{3}}{3}+\frac{x^{5}}{5}-\frac{x^{7}}{7}+... \right \}$
Last edited by rishilaish; October 1st 2011 at 05:25 AM.
My 'proof' doesn't use the 'Taylor series theorem' ... | 5 | [
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Question to do with volume of a solid between a paraboloid and a plane
January 26th 2010, 07:11 AM
rpatel
Question to do with volume of a solid between a paraboloid and a plane
Hi
the question is
Use polar coordinates to find the volume of the solid which is under the paraboloid $z=x^{2}+y^{2}$and abov... | 5 | [
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-0.017333984375... | 42,799 | 42799 |