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Topic: LinearProgramming[]
Replies: 3 Last Post: Dec 11, ... | 5 | [
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Homework Help
Posted by amar on Tuesday, November 15, 2011 at 7:29am.
An aeroplane when 6000 m high passes vertically above another plane at an instant when their angles of elevation at the same observing point are 60° and 45° respectively. How many meters higher is
the one than the other?
• geometry - Reiny, Tuesd... | 4 | [
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0.0... | 10,401 | 10401 | |
Container.List
------------------------------------------------------------------------
-- The list container
------------------------------------------------------------------------
{-# OPTIONS --without-K #-}
module Container.List where
open import Bag-equivalence
using () renaming (_≈-bag_ to _≈-bagL_; _∈_ to _... | 4 | [
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0.0393066406... | 10,402 | 10402 | |
Geometric Sequences - Concept
Brightstorm is like having a personal tutor for every subject
See what all the buzz is about
Check it out
Geometric Sequences - Concept 22,144 views
When modeling real world situations, we often use what's called inverse or indirect variation to describe a relation between two variable... | 4 | [
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equilibrium of forces
December 30th 2008, 04:01 AM
djmccabie
equilibrium of forces
I know i keep posting these sort of questions, its just not clicked yet.
A particle P is on a horizontal plane. Three horizontal forces of magnitude 7N, 10N and 6N, acting in directions as shown in the diagram, are applied to... | 4 | [
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computational complexity
up vote 8 down vote favorite
2
I am interested into computational complexity of decision problem: Does a given 2-dimensional simplicial complex contain (any)triangulation of 2-sphere? This problem trivially lies into NP, because
certificate is the subset of triangles. I think that it is NP-com... | 5 | [
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0.06347... | 10,405 | 10405 | |
Halleys metyhod matlab help
April 14th 2010, 09:16 PM #1
Junior Member
Joined
May 2009
Posts
45
Halleys metyhod matlab help
This is my code, to find the f(x)=0 positive root, using halleys method
2 m files
1. function file
function [y,dydx,ddyddxx]=h(x)
% The function is expressed, and ... | 5 | [
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hyperring
Contents
Idea
A hyperring is like a ring not with an underlying abelian group but an underlying canonical hypergroup.
It is a hypermonoid with additional ring-like structure and properties.
This means that in a hyperring $R$ addition is a multi-valued operation.
Definition
A hyperring is a non-empty set... | 4 | [
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-0.04... | 10,407 | 10407 | |
10 throws of coin 0-4 heads how many possibilities?
February 21st 2008, 08:48 AM #1
Newbie
Joined
Jan 2008
From
West Dublin
Posts
9
10 throws of coin 0-4 heads how many possibilities?
If one tosses a coin ten times, how many possible outcomes are there (assuming order is important) if of the ten thro... | 4 | [
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Math Help
January 11th 2008, 08:26 AM #1
Newbie
Joined
Jan 2008
From
Surrey - home / Portsmouth - uni
Posts
20
Indices
Hey, Can anyone tell me how to simplify this expression into a single power
Sorry didn't know how to write the formular on the computer, hopefully you will understand this
... | 4 | [
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Proof that lim x-> inf (x ^ (1/x)) = 1
May 6th 2013, 01:02 PM #1
Member
Joined
Jun 2012
From
Georgia
Posts
179
Thanks
22
Proof that lim x-> inf (x ^ (1/x)) = 1
I started this proof by letting f(x) = (x ^ (1/x)) - 1 and attempting to show that that converges to zero. It's pretty straightforward to... | 5 | [
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Integer triangle
up vote 2 down vote favorite
Is there a triangle whose vertices, as well as the four classical points, the centroid, the orthocenter, the incenter, and the circumcenter, all have integer coordinates?
gm.general-mathematics
6 Sure. Start with a 3-4-5 triangle, with vertices $(0,0)$, $(4,0)$, and $... | 5 | [
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Surface Area and Volume of a Sphere
Date: 08/30/99 at 03:21:08
From: Tuan Vu
Subject: Surface and volume of spheres
Besides using integration, is there an intuitive way of seeing why the
surface area of a sphere = 4(pi)r^2 and the volume = (4/3)(pi)r^3?
Date: 08/30/99 at 08:41:17
From: Doctor Peterson
Subject: Re:... | 4 | [
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Elementary proof for identity involving sums of binomials
up vote 5 down vote favorite
1
Is there an elementary proof of this identity?
$$n + 1 - \sum_{k=1}^{n} k^{k-1} \binom{n}{k} \frac{(n-k)^{n+1-k}}{n^{n}} =1 + \sum_{k=1}^n \frac{n!}{(n-k)!n^k}\;?$$
The term on the right is the average time to find a duplicate b... | 5 | [
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Homework Help
Posted by John on Tuesday, October 19, 2010 at 8:30pm.
find the limit of f'(x) = 1/(√x) using the limit definition of derivative as x approaches 0.
• calculus - MathMate, Tuesday, October 19, 2010 at 9:34pm
Given f(x)=1/√x
f'(x)
=Lim h->0 (f(x+h)-f(x))/h
=Lim h->0 (1/√(x+h)-1/√x))/h
... | 5 | [
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Decision Making
Decision Making and Forecasting: with Emphasis on Model Building and Policy Analysis
Authors
Kneale T. Marshall
Professor of Operations Research, Operations Research Department, Naval Postgraduate School, Monterey, California 93943
Robert M. Oliver
Professor Emeritus, Department of Industrial Engine... | 5 | [
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Proof of limit of nth root of n
February 14th 2013, 06:21 AM
carla1985
Proof of limit of nth root of n
My lecturer has asked us to prove:
http://img826.imageshack.us/img826/4...30214at150.png
Uploaded with ImageShack.us
im confused as to what details I need to provide as it looks as if its prett... | 5 | [
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simplify
Hi how can i simplify 3a^3b multiplied by 4(ab)^2. Also how can i factorise x^2-4 and x^2-5x+6 Thank you
first one. Rules of indices maybe? do you know them ? difference of two square ? factoring quads ? have you never done a question like these before ?
$3a^3b \times 4a^2b^2$ $=12a^5b^3$ (Constants are mult... | 4 | [
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0.063476... | 10,417 | 10417 | |
Digital Logic Design
The subtraction of two binary numbers may be accomplished by taking the complement of the subtrahend and adding it to the minuhend. By this method, the subtraction operation becomes an addition
operation requiring full adders for its machine implementation. It is possible to implement subtraction w... | 4 | [
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Appendix B, Table B.4
The Economic Costs of Alcohol and Drug Abuse in the United States - 1992
Appendix B, Table B.4
Outline for Estimation of Lost Earnings Using the RAND Microsimulation Technique for the Alcohol Dependent Population
(Note that making estimates for the drug dependent population is directly parallel... | 4 | [
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-0... | 10,419 | 10419 | |
on
I was asked how to calculate the power to a 3 phase delta connected heater if the load is not balanced. We all know the formula W = LV x LA x 1.732 x PF for 3 phase power but I can't remember how to
do the same for an un-balanced load. My intuition tells me that using the average current for LA would be close but... | 5 | [
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How to use a Fourier Transform to evaluate an integral?
I'm stuck on this concept... How does one use a Fourier Transform to evaluate an integral? Thank you!
In a PM the OP stated the question as: Well, here's the question. (I hope that you can be of assistance!) Let f(t) be the even function that is zero if t > 1, an... | 4 | [
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Homework Help
Posted by Jake on Thursday, May 24, 2012 at 12:18am.
Twenty people apply for seven jobs that are available at fly by night aircraft company
12 are men and the rest are women.
How many seven person groups have exactly three men?
How many of these seven person groups have exactly three men or three wome... | 4 | [
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... | 10,422 | 10422 | |
Gregory's Series
Associated Topics || Dr. Math Home || Search Dr. Math
Gregory's Series
Date: 06/14/97 at 01:21... | 5 | [
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LCM of Polynomials
Top
The term LCM refers to Least Common Multiple. For finding the LCM, we need to have two terms. To find the LCM of polynomials, we need to have some knowledge of polynomial. We already know that a
polynomial is a mixture of variables and constant. If we are having a function x
^2
+ 3x + 4, then ... | 4 | [
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Math Forum Discussions - [ap-stat] A Closing Lesson
Date: Aug 13, 2012 11:32 AM
Author: David Bee
Subject: [ap-stat] A Closing Lesson
NOTE:
This ap-stat EDG will be closing in the next few weeks. Please sign up for the new AP Statistics Teacher
Community Forum at https://apcommunity.collegeboard.org/getting-started an... | 5 | [
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Can someone show me how to prove this as an equivalence relation or not?
April 29th 2012, 06:22 AM #1
Junior Member
Joined
Apr 2012
From
Alaska
Posts
31
Can someone show me how to prove this as an equivalence relation or not?
a) Consider the relation R defined on Z(the integers) by x~y when xy is gre... | 4 | [
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[racket] Does Redex have support for multi-hole evaluation contexts?
[racket] Does Redex have support for multi-hole evaluation contexts?
From: David Van Horn (dvanhorn at ccs.neu.edu)
Date: Sun Jul 8 15:52:43 EDT 2012
On 7/8/12 3:12 PM, Ryan Newton wrote:
> Thanks for the example!
>
> Masako Takahashi "Paral... | 4 | [
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Math Forum Discussions
Re: The Charlwood Fifty
Posted: May 23, 2013 12:17 PM
Albert Rich schrieb:
>
> There has been much discussion in recent sci.math.symbolic posts about
> the performance of various systems on 10 integration problems from
> Kevin Charlwood's 2008 article "Integration on Computer Algebra
> Systems"... | 5 | [
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0.... | 10,428 | 10428 | |
Evaluate this sum
May 3rd 2009, 02:37 AM #1
Evaluate this sum
Is there any way to evaluate this sum exactly?
$\frac{2}{3^1}+\frac{2}{3^2}+\frac{2}{3^6}+\frac{2} {3^{24}}+... = \sum_{n=1}^{\infty}\frac{2}{3^{n!}}$
If not, can someone give me a good approximation? Also, is there any way to know whether th... | 5 | [
-0.028076171875,
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0.00970458984375,
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-0.0296630859375,
-0.02941... | 10,429 | 10429 | |
Super Roulette Strategy
The Super Roulette Strategy: The Best Roulette Systems Ever Released
... | 4 | [
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-0.0240478515625,
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0.10546875,
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... | 10,430 | 10430 | |
[SOLVED] An ugly PP calc word problem
November 12th 2007, 11:17 PM #1
[SOLVED] An ugly PP calc word problem
I found this on a power point on the net and trying to solve it.
Its a conic section from the ellipse chapter.
□ The mean distance of Mars from the Sun is 142 million miles.
☆ Perihel... | 4 | [
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0.06640625,
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Matrices
January 25th 2013, 08:17 AM
MMCS
Matrices
A transformation in the plane is represented by a 2 x 2 matrix.
Under this transformation, the point (7,7) is transformed to (-5,-6) and the point (-2,8) is transformed to (-4,2)
Can someone help me to find the transformation matrix for this?
I dont... | 5 | [
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-0.064453125,
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0.0133056640625,
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0.00... | 10,432 | 10432 | |
Heteroscedasticity
Chapter Contents Previous Next
Heteroscedasticity
One of the key assumptions of regression is that the variance of the errors is constant across observations. If the errors have constant variance, the errors are called homoscedastic. Typically,
residuals are plotted to assess this assumption. S... | 5 | [
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Using the Inverse Trigonometric Functions - Concept
Brightstorm is like having a personal tutor for every subject
See what all the buzz is about
Check it out
Using the Inverse Trigonometric Functions - Concept 19,188 views
In a problem where two trig functions are not inverses of each other (also known as "inverse ... | 4 | [
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... | 10,434 | 10434 | |
Integer Rings
Date: 05/18/2005 at 02:35:12
From: Francois
Subject: "integer" ring in a field
Given a (commutative, characteristic zero) field F, is (are) there any
ring(s) such that F is the fraction field of R? If any, how many, and
how are they related?
The characteristic zero case is the one I'm faced with, but
c... | 5 | [
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0.04296... | 10,435 | 10435 | |
Finding the intersection of two planes
1. Solve the system of simultaneous equations for x, y: $\left|\begin{array}{l}x-4y=2-3z \\ 9x+3y=5-z\end{array}\right.$ 2. You should come out with the result: $\left|\begin{array}{l}x=\frac23-\
frac13 z \\ y= -\frac13 + \frac23 z \\ z = z\end{array}\right.$ 3. Replace z = t and ... | 5 | [
-0.0264892578125,
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0.038818359375,
-0.096191406... | 10,436 | 10436 | |
Largest Magic Square Ever Known
Date: 09/18/2001 at 03:46:49
From: Jayson Javellana
Subject: Largest Magic Square Ever Known
Dr. Math,
I am eager to know what was the largest magic square ever constructed
and known in the world of mathematics. What is the easiest way to find
the sum of each row, column, and main di... | 5 | [
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0.047607421875,... | 10,437 | 10437 | |
How would i solve this (integration i think)
April 9th 2009, 01:06 AM #1
Newbie
Joined
Feb 2009
Posts
22
How would i solve this (integration i think)
Find the equation of the curve for which y''= 10 if the curve is tangent to the line y = 13x at (2, 26).
like give me the steps on how to solve it ...... | 4 | [
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Comparing Fractions
Date: 08/04/99 at 19:47:15
From: Jennifer
Subject: Fractions
Dr. Math,
To start us off this year in pre-calculus our teacher made us place
fractions in descending and ascending order. I don't quite understand
how you can tell just by looking at a fraction whether it's larger or
smaller than anot... | 4 | [
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0.09765625,
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0.062255859375,
... | 10,439 | 10439 | |
Procedures as Black-Box Abstractions
Next: Procedures and the Processes Up: The Elements of Programming Previous: Example: Square Roots by
Procedures as Black-Box Abstractions
Sqrt is our first example of a process defined by a set of mutually defined procedures. Notice that the definition of sqrt-iter is recu... | 4 | [
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0.015625,
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ordinary homology
Context
Homological algebra
Contents
Idea
Ordinary homology is generalized homology with respect to an Eilenberg-MacLane spectrum $H A$, and often understood over $H \mathbb{Z}$.
Equivalently this is computed by singular homology with coefficients in $A$.
Properties
Relation to homotopy groups
... | 4 | [
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0.0378417... | 10,441 | 10441 | |
Poisson Process + Erlang PDF Question
March 28th 2013, 11:02 AM #1
Junior Member
Joined
Jun 2010
Posts
59
Poisson Process + Erlang PDF Question
A claims process has one claim every ten hours. This is modeled as a Poisson process with $\lambda = 0.1$
What is the probability that the 3rd claim will b... | 5 | [
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-0... | 10,442 | 10442 | |
Volume of bounded region
February 17th 2010, 05:49 PM #1
Junior Member
Joined
Feb 2010
Posts
45
Volume of bounded region
Let R denote the region enclosed by the y-axis, the line y = 1, and the curve
y = sqrt(x). Compute the volume of the solid whose base is R and whose cross sections perpendicular to... | 5 | [
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-0.0483398437... | 10,443 | 10443 | |
What are the $p$-adic representations of $\hat{\mathbb{Z}}$ ?
up vote 12 down vote favorite
6
A continuous representation $\hat{\mathbb{Z}} \rightarrow GL_n(\mathbb{Q}_p)$ is determined by the image of $1$. But the image of $1$ does not always defines such a representation (consider for
example the representation whic... | 4 | [
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Difference Operator and the falling factorial power of k
October 28th 2009, 07:12 PM
waddlyeli
Difference Operator and the falling factorial power of k
I have been able to show by algebraic manipulations that the when one applies the difference operator to "x to the n falling" one finds equality with n times x t... | 5 | [
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0.0322265625,
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0.04711914... | 10,445 | 10445 | |
combining fractions
November 13th 2006, 01:42 PM #1
Newbie
Joined
Nov 2006
From
Ohio
Posts
4
If You know how to Combine Like Fractions or know of a site where I can plug in problems and get tips and how to do them then PLEASE help me!
9) -2(c-d) + (c-d) - 6(c-d)
10) -3(4x + -2y) - 2(x+3y) -2... | 4 | [
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0.0625,
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0.06640625,
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0.071289062... | 10,446 | 10446 | |
Horsepower vs Torque Relevance and Explanation Attempt!
Quote:
POWER/TORQUE/GEARING
Engine horsepower and engine torque is perhaps the single most misunderstood subject amongst people and even proclaimed car enthusiasts. The importance of the two values have been argued for as long
as engines have existed and that is... | 4 | [
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... | 10,447 | 10447 | |
applied max/min problems!
December 6th 2009, 01:11 AM
calculusisnotfun
applied max/min problems!
Hi Im new here lol! It's really late and i was working on some calculus. I stumbled across a difficult problem and google led me here. Anyways here is the problem:
A field has boundary a right triangle with hypot... | 5 | [
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-... | 10,448 | 10448 | |
Constant Multiple Rule
December 5th 2009, 08:58 AM #1
Member
Joined
Oct 2009
Posts
229
Constant Multiple Rule
Finding the derivative of this rule;
y = (e^x - e^-x) / 2
y = 1/2 (e^x - e^-x)
y' = 1/2 (e^x + e^-x)
The constant multiple rule was applied to that last line to flip the minus... | 5 | [
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-0... | 10,449 | 10449 | |
characteristic polynomial and invertible matrices
February 8th 2009, 06:56 PM #1
characteristic polynomial and invertible matrices
Given $A$, an $n \times n$ matrix, with the following characteristic polynomial
$f(t) = (-1)^n t^n +a_{n-1}t^{n-1}+ \ \dotso \ + a_1t+a_0$ show that $A$ is invertible if only if ... | 4 | [
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0.0037841796875,
-0.... | 10,450 | 10450 | |
Math Forum Discussions
Re: An optimization problem
Posted: Sep 8, 2013 5:13 AM
quasi wrote:
> William Elliot wrote:
>> analyst41@hotmail.com wrote:
>>
>>> consider f(x1,x2,...xn) = {1 + sum(xi)^2)} / {1 +sum{x(i)}
>>> 0 <=xi <=1 for all i.
>>>
>>> The maximum function value of 1 occurs at either
>>> all x's = 0 or all... | 5 | [
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0.062... | 10,451 | 10451 | |
A set of points congruent to its proper subset
up vote 8 down vote favorite
5
There are sets of points in $\mathbb{R}^n$ congruent to their own proper subsets. A (trivial) example is a ray, or to give a more interesting bounded example, $\{e^{i \cdot n} \mid n\in\mathbb{N}\}$.
There are references saying about a proof... | 5 | [
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0.... | 10,452 | 10452 | |
bl
Zentralblatt MATH
Publications of (and about) Paul Erdös
Zbl.No: 501.52009
Autor: Erdös, Paul; Purdy, G.; Straus, E.G.
Title: On a problem in co... | 4 | [
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Parametric equations, circle, center, radius
February 8th 2011, 06:01 PM #1
Parametric equations, circle, center, radius
This is a question from my calculus 3 class.
"Show that the graph of r = sin(t)i + 2cos(t)j + sqrt(3) * sin(t)k is a circle and find its radius and center."
In my head, I know that in... | 4 | [
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0.00... | 10,454 | 10454 | |
Evaporation
8.4-1. Heat-Transfer Coefficient in Single-Effect Evaporator. A feed of 4535 kg/h of a 2.0 wt % salt solution at 311 K enters continuously a single-effect evaporator and is being concentrated to
3.0%. The evaporation is at atmospheric pressure and the area of the evaporator is 69.7 m^2. Saturated... | 5 | [
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... | 10,455 | 10455 | |
abstract algebra #2
Last edited by mr fantastic; April 15th 2010 at 03:36 PM. Reason: Edited post title
Dear Deepu, $(a,b)=p$ Take $(a^2,b^2)=k$ Now since, $k\mid{a^2}$ and $k\mid{b^2}$ Therefore, $k\mid{a}$ and $k\mid{b}$ Then since the gcd of "a" and "b" is "p" ; $k\leq{p}$ ---------------A Also
since $p=(a,b)\Right... | 5 | [
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0.0830078125,
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-0.01708984375,
-0.006011962890625,
0.039794921875,
0.03125,
0.003387451171875,
0.0167236328125,
-0.047119140625,
0.03076171875,
0.103515625,
0.017578125,
0.035888671875,
0.034423828125,
0.025390625,
0.046142578125,
0.03955078125,
-0.... | 10,456 | 10456 | |
2 questions : Kernel/Image of a linear transformation and orthonormal basis
February 10th 2009, 11:41 AM #1
2 questions : Kernel/Image of a linear transformation and orthonormal basis
Hello MHF,
It is the continuation of the exercise I posted in my precedent thread.
So I recall, I have a vectorial subspac... | 5 | [
-0.035400390625,
0.0390625,
0.020751953125,
-0.00640869140625,
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0.01470947265625,
0.01202392578125,
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0.072265625,
-0.07080078125,
-... | 10,457 | 10457 | |
Strains
Introduction
This page begins a series on the many strain definitions that exist and are used throughout mechanics. We will start here with so-called
infinitesimal strains
. This is a bit of a misnomer because, as we will see, it is actually rotations that need to be small, not the strains themselves, in or... | 4 | [
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0.0791015625,
-0.0556640625,
-0.056884765625,
-0.059814453125,
-0.015... | 10,458 | 10458 | |
Purely Transcendental
August 12th 2007, 07:46 AM
ThePerfectHacker
Purely Transcendental
Given an element $x\in \mathbb{R}$ having a property that no non-constant polynomial in $\mathbb{Q}$ has $x$ as a zero, we call it "transcendental". For example, $\pi \in \mathbb{R}$ is an
example.
However, if we all... | 4 | [
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0.038330078125,
0.021240234375,
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-0.01116943359375,
-0.0380859... | 10,459 | 10459 | |
Explain Derviations of potensfunctions in laymens terms please
April 16th 2008, 09:32 AM #1
Junior Member
Joined
Feb 2008
Posts
71
Explain Derviations of potensfunctions in laymens terms please
Okay sitting here doing some homework that is using the simple derivaiton of potensfunctions... and I can't get... | 5 | [
0.03662109375,
-0.002288818359375,
0.05078125,
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0.0189208984375,
-0.103515625,
... | 10,460 | 10460 | |
help with algebra in calc question: infinite limit
March 11th 2009, 03:49 PM #1
Newbie
Joined
Mar 2009
Posts
1
help with algebra in calc question: infinite limit
i was trying to find the limits of a function when i came onto a problem
square root of ( (x^2) + 9x + 3)
multiply by (1/x)
this ... | 5 | [
-0.040283203125,
-0.0001811981201171875,
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0.0673828125,
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0.08544921875,
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0.0546875,
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0.033447265625,
0.07421875,
-0.0294189453125,
-0.0125732421875,
-0.01940917968... | 10,461 | 10461 | |
Math Help
October 15th 2009, 02:15 PM #1
Junior Member
Joined
Oct 2009
From
Florida
Posts
43
test
Only took me 45 minutes to type this up .... not setting any records here :P
Please try using Stapel sources before using my results. I am trying to practice using latex and it took me approx... | 4 | [
-0.0220947265625,
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-0... | 10,462 | 10462 | |
What's the cubic inches on a .030 over 289? - MustangForums.com
06-20-2007, 11:18 AM #11
Foghorn Leghorn RE: What the cubic inches on a .30 over 289?
... | 4 | [
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0.04052734375,
0.... | 10,463 | 10463 | |
A recursive evaluation of zeta of negative integers
arXiv: David Berenstein released a review of TeV strings that discusses stringy braneworlds where the excited strings may really be seen at the LHC. He offers some intro to strings, D-branes,
effective actions, gauge groups, large extra dimensions, warped geom... | 5 | [
-0.0576171875,
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0.074707031... | 10,464 | 10464 | |
Topology. Matrix question
December 5th 2012, 10:05 PM
vercammen
Topology. Matrix question
Let $x_1 , x_2, ..., x_k$ be vectors in $\mathbb{R}^n$; let $X$ be a matrix $X = [x_1 , x_2, ..., x_k]$. If $I = (i_1, i_2,...,i_k)$ is an arbitrary $k$-tuple from the set $\{1, 2, ... ,n\}$,
show that
$\phi_{i_1}... | 4 | [
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-0.006134033203125,
0.049560546875,
0.0104370... | 10,465 | 10465 | |
Math Help
May 23rd 2008, 11:30 PM #1
Newbie
Joined
May 2008
Posts
22
find age
ten years ago,anns mother was four times older than her dauhter.after ten years the mother will be twice older than daughter.the present age of ann is
Hello, hena!
Ten years ago, Ann's mother was four times older tha... | 4 | [
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0.0673828125,
-0.015625,
... | 10,466 | 10466 | |
Algebraic Manipulation
September 12th 2013, 07:48 AM #1
Newbie
Joined
Sep 2013
From
Ramallah, Palestine
Posts
6
This is Boolean Algebra. + means OR, the . means AND and the x! means X NOT.
Use algebraic manipulation to prove that x +yz = (x + y).(x+z)
x + yz = (x+y) AND (x + z) ...
x ... | 4 | [
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-0.06298828125,
0... | 10,467 | 10467 | |
Arithmetic vs. Geometric Mean
Date: 03/27/2001 at 19:04:27
From: Mark
Subject: Arithmetic vs. geometric mean
When would it be appropriate to use the arithmetic mean over the
geometric, or vice versa? I am not trying be vague, but the geometric
mean will always be less than the arithmetic. Are there specific
circumst... | 4 | [
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0.078125,
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0.006378173828125,
... | 10,468 | 10468 | |
Planar intersections
January 28th 2011, 06:28 AM
Ackbeet
In 2 dimensions, order doesn't matter. But in 3 dimensions, order almost always matters. So make sure you have the order the way you want it. I would take some special cases, easy ones, and just
do the rotation in your head to see if they come out right... | 5 | [
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0.0002460479736328125,
-0.0284423828125,
-0.00909423828125,
-0.1176757812... | 10,469 | 10469 | |
Linear Equations
Example 1 Solve each of the following equations.
(a) [Solution]
(b) [Solution]
(c) [Solution]
(d) [Solution]
Solution
In the following problems we will describe in detail the first problem and the leave most of the explanation out of the following problems.
(a)
For this problem there are no fra... | 4 | [
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0.072265625,
-0.0625,
0.044677734375,
-0.08... | 10,470 | 10470 | |
Math Help
August 20th 2008, 04:29 PM #1
Junior Member
Joined
Jun 2008
From
Sanger, CA
Posts
58
Determine a value for k so that the point (1,k) is the same distance from the line x= -2 as it is from the point (2,0).
Here is one way of doing this.
The point (1,k) is anywhere on the vertical l... | 4 | [
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-0.0277099609375,... | 10,471 | 10471 | |
uniform order stats question
October 18th 2008, 04:50 PM #1
uniform order stats question
I'm having some difficulty finding the mean and the variance of the following question:
Let $Y_1, Y_2,... \ ,Y_n$ be independent uniformly dist. r.v. on the interval $[0, \theta]$
I found my density function for kth... | 5 | [
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0.0174560546875,
-0.0... | 10,472 | 10472 | |
Implicit Differentiation
January 10th 2010, 04:09 PM
suchgreatheights
Implicit Differentiation
I don't really know how to do implicit differentiation. Could you show me how to do it with the equation y-sin(xy)=x ² ? Thanks!
January 10th 2010, 04:41 PM
mr fantastic
Quote:
I assume the main trouble is... | 5 | [
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... | 10,473 | 10473 | |
Eigenenergy and Eigenfunctions
April 14th 2008, 01:20 AM
Unoticed
Eigenenergy and Eigenfunctions
I'm trying to write a normalised wavefunction at time t, given the normalised wavefunction at t=0. I've found out that first I should write the initial wavefunction as a sum of the energy
eigenfunctions, and then... | 4 | [
-0.0712890625,
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0.033203125,
0.0101318359375,
-0.04638671875,
-0.08496... | 10,474 | 10474 | |
GMAT Permutations and Combinations
Permutations
A permutation is a possible order in which to put a set of objects. Suppose I had a shelf of 5 different books, and I wanted to know: in how many different orders can I put these 5 books? Another
way to say that is: 5 books have how many different permutations?
In ord... | 4 | [
0.0146484375,
-0.048583984375,
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-0.045654296875,
0.016845703125,
... | 10,475 | 10475 | |
Integration, x^3*sqrt(2-x)
December 12th 2009, 02:01 PM
micro31337
Integration, x^3*sqrt(2-x)
hello, this problem has been annoying me for the past 24 hours, and i cant seem to figure out where to begin,
Evaluate the integral:
(integration sign goes here) (x^3*sqrt(2-x)) dx
ive tried substitution b... | 5 | [
0.0228271484375,
-0.05859375,
0.017578125,
0.038330078125,
-0.0050048828125,
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0.00970458984375,
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-0.052978515625,
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0.055419921875,
0.02490234375,
0.0054931640625,
0.01531982421875,
-0.... | 10,476 | 10476 | |
Volume of a Sphere
Date: 04/21/98 at 14:08:55
From: Ariel Fishman
Subject: Calc 2 proof
Can you help me prove the formula for the volume of a sphere? I have
no clue as to where to start! Your help with previous questions has
been greatly appreciated and very helpful. Thank you!
--Ariel Fishman
Date: 04/21/98 at 1... | 5 | [
0.025634765625,
0.05712890625,
0.036865234375,
0.0281982421875,
0.00341796875,
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0.10791015625,
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0.0306396484375,
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0.115234375,
0.009765625,
-0.059326171875,
-0.01708984375,
0.0378417... | 10,477 | 10477 | |
More help.. on functions
October 27th 2006, 06:15 PM #1
Member
Joined
Mar 2006
Posts
82
More help.. on functions
Hi,
Let f: R --> R be the function f(x) = (x + 1)^2. Compute the following sets:
i) f [{-1}]
ii) f^-1 [[-1, 1]]
iii) f[ [-1, -1] ] union [1, 3] ]
iv) f[f^-1 [ [-3, -1] ] ... | 4 | [
-0.0247802734375,
0.08447265625,
0.001983642578125,
0.004364013671875,
0.034912109375,
0.01495361328125,
0.10986328125,
0.0245361328125,
-0.007354736328125,
-0.09326171875,
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0.072265625,
0.00069427490234375,
-0.05712890625,
-0.08740234375,
-0.043457031... | 10,478 | 10478 | |
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Topic: Please help me simplify this expression.
Replies: ... | 4 | [
-0.01611328125,
-0.022705078125,
0.0673828125,
0.080078125,
0.0537109375,
-0.07373046875,
-0.032958984375,
-0.0191650390625,
0.07177734375,
0.06787109375,
0.025146484375,
-0.06591796875,
0.06884765625,
0.06689453125,
0.06591796875,
0.1240234375,
-0.06201171875,
0.02587890625,
-0.... | 10,479 | 10479 | |
Area between curves
October 4th 2010, 06:52 PM #1
Newbie
Joined
Sep 2010
Posts
6
Area between curves
Find the area of the region between the curves x=4-y² and x=-3y
I keep getting 56/3 but that doesnt match any other answer. can someone help me out?
First, I think it'll be much easier to re... | 5 | [
0.03564453125,
-0.05712890625,
0.001312255859375,
-0.0308837890625,
-0.02001953125,
-0.0791015625,
-0.0072021484375,
0.07958984375,
0.00360107421875,
-0.051025390625,
0.007293701171875,
-0.0087890625,
0.04833984375,
0.014892578125,
-0.031494140625,
0.05712890625,
0.02392578125,
-0.... | 10,480 | 10480 | |
hi plz help in this integral homework?????????
hello all if u can plz help me with this homework i attached it here thx 4 all
$f(x) = 6x - e^{1 - 2x}$ a) $A = \int_1^5 (6x - e^{1 - 2x})dx$ and $W = \frac{1}{4 - 1} \int_1^4 (6x - e^{1 - 2x})dx$ To do either of these we need $\int (6x - e^{1 - 2x})dx$ Let's rewrite this... | 5 | [
0.042724609375,
0.030517578125,
0.08154296875,
-0.048828125,
0.006561279296875,
0.0172119140625,
0.02001953125,
0.05908203125,
-0.08203125,
0.0164794921875,
0.05712890625,
-0.09033203125,
0.026611328125,
-0.043701171875,
-0.034423828125,
-0.01214599609375,
-0.07470703125,
0.0417480... | 10,481 | 10481 | |
Basic factorising question
February 10th 2013, 06:48 PM
Rade
Basic factorising question
2x^2 + xy - 3y^2
How do you go about factorising this simply and easily?
I arrived at the correct answer (x - y)(2x + 3y) only after thinking and playing around with it for ages.
It's been a long time since I wen... | 4 | [
-0.0257568359375,
-0.04345703125,
-0.01214599609375,
0.0308837890625,
0.10205078125,
0.0380859375,
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-0.03857421875,
-0.0576171875,
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0.07177734375,
0.0166015625,
0.039306640625,
-0.03173828125,
0.022705078125,
0.08056640625,
-0.1044921875,
-0.02734375,... | 10,482 | 10482 | |
quadratic equation reduction
May 28th 2012, 01:42 PM #1
Member
Joined
May 2012
From
Toronto
Posts
244
Thanks
1
quadratic equation reduction
an example in my text says that if the values for a, b and c are 2π, 2πh and -S respectively
with those values plugged into the quadratic equation you g... | 4 | [
-0.06201171875,
0.09130859375,
0.0177001953125,
0.049560546875,
-0.0673828125,
0.1533203125,
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0.07421875,
0.0703125,
-0.00982666015625,
0.05224609375,
-0.0419921875,
0.10595703125,
0.00946044921875,
-0.00173187255859375,
0.00579833984375,
-0.01397705078125,
-0.0260... | 10,483 | 10483 | |
Is It Possible That x/0 is Not Really Undefined?
Date: 06/14/2004 at 04:16:42
From: Stephane
Subject: Can we not define x/0 in the example of the complex number i
As we are all told, n = 1/0 is undefined, since no number n exists
that, when multiplied by 0, gives the result 1 (i.e., n*0 = 1).
However, drawing an exa... | 4 | [
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The Intelligent Investor Blog
Click here to download all the SVXY, front month VIX futures and contango and backwardation data since 2004. Note that the data was updated on June 27 2014 13:18:47 (California Time).
The calculated SVXY price is modeled based on VIX futures data. This allows to obtain the price of the SV... | 4 | [
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0.0032806396484375... | 10,485 | 10485 | |
Integration - Reduction formulas
January 13th 2009, 12:32 PM #1
Junior Member
Joined
Nov 2008
Posts
68
Integration - Reduction formulas
By writing $\sin^{2n} (x) = \sin^{2n-2}( x ) [1- \cos^2( x )]$, use integration by parts (just once, in the second term) to derive the reccurence relation:
$I_{2n} ... | 5 | [
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Triple integrals
November 21st 2009, 09:51 AM #1
Newbie
Joined
Nov 2009
Posts
2
1. The problem statement, all variables and given/known data
I have this question about triple integrals and spherical coordinates
2. Relevant equations
y = $\rho$ sin $\varphi$ sin $\theta$
x = $\r... | 4 | [
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Just a simple order of operations question
May 30th 2012, 07:49 AM #16
Re: Just a simple order of operations question
Is that your work there? Because that looks good to me (so long as we agree that x is positive and that y and z are nonzero).
You are correct when you say that raising a product to an nth pow... | 4 | [
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Chapter 8: On the Modeling of Carbon Nan
On the Modeling of Carbon Nanotubes as Drug Delivery Nanocapsules tot = n R i R o ( 2 + ) d 2 g 2 + n g R i R o ( 2 - ) d 0 - 2 2 0 where H 1 = - A , ( 1 ) G = 3 , 1 8 ( 2 ) G 1 = 63 , 256 ( 1 ) G =
3 , b 4 H 2 = B 1 ( G ) = 4 9 21 2 1 ( 2 ) ( ( , G ) = , G 2 = , G 32 ) = 160 80... | 4 | [
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DistMesh - A Simple Mesh Generator in MATLAB
News (Mar 11, 2012)
I have not been maintaining/updating the distmesh code since I wrote it, but by popular request I have now posted a new version. The main differences and new features are:
• New 3-D surface mesh generator distmeshsurface.m, type "help distmeshsurface... | 4 | [
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Differentiation and Implicit Differentiation
February 6th 2009, 01:23 AM #1
Newbie
Joined
Feb 2009
Posts
17
Differentiation and Implicit Differentiation
implicit differentiation
1) y=x^2+yx
2) xy-y^3=1
3) 1/xy-y^2=2
differentiation
1) f(x)=<square root>(x^2-1)/ 1+<square root>(x^2+1... | 5 | [
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line integral very urgent please help
Find line integral F(x,y) .dr where C is the curve given by r(t)=(t^2 -2)i+((t-1)+t(t-2)cos(t))j 0<=t<=2 and f(x,y) = (xy^2+2x)i+(x^2y +y+1)j
Quote: Originally Posted by bobby77 You need to know that: $\vec r(t)\ =\ x(t).i\ +\ y(t).j$ so: $x(t)=t^2-2$ $y(t)=(t-1)+t(t-2)cos(t)$. Th... | 4 | [
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Percentage of Alcohol in a Solution
Date: 06/02/99 at 00:28:59
From: Nycole
Subject: Algebra
Suppose 30 liters of a solution with an unknown percentage of alcohol
is mixed with 5 liters of a 90% alcohol solution. If the resulting
mixture is a 62% alcohol solution, what is the percentage of alcohol
in the first solut... | 4 | [
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Trigonometric Identities
Date: 05/24/99 at 22:51:25
From: Christy Miller
Subject: Trigonometric Identities
I just started in Trigonometry with Identities. (I will use @ to mean
theta.) I understand how to verify or prove basic identities true such
as: sec@ = 1/cos@, but I do not understand how to simplify problems
s... | 4 | [
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Dynamics of Galaxies - Giuseppe Bertin
© CAMBRIDGE UNIVERSITY PRESS 2000
Problems
1. Without addressing the issues involved in the solution of the self-consistent problem, consider simple analytical forms of distribution functions f (E, J2) able to display either a tangentially
biased or a radially biased ... | 4 | [
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Lab_3C.nb
Lab 3C - Tangent Planes
Math 2374 - University of Minnesota
http://www.math.umn.edu/math2374
questions to: rogness@math.umn.edu, drake@math.umn.edu
Introduction
In the last few labs, we've investigated properties of continuity, differentiability, partial derivatives, directional derivatives, and gradients. ... | 5 | [
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HP12C - Self-Study Guide : Educalc.net
The HP 12C guided self-study consists of a series of questions/problems that are to be answered using the calculator and manual. The goal of this self-study is to gain familiarity with the common
uses of the HP 12C and identify areas that require further study. The layout follows ... | 5 | [
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-0.0512695312... | 10,497 | 10497 | |
Tilt Measurement Using a Dual Axis Accelerometer
CIRCUIT DESCRIPTION
Supply Voltage and Decoupling
The ADXL203 requires only one 0.1 μF decoupling capacitor as long as there is no noise present at the 140 kHz internal clock frequency. If necessary, larger bulk capacitors (1 μF to 10 μF) or ferrite
beads can be includ... | 4 | [
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0.00092697143554687... | 10,498 | 10498 | |
calculus - antiderivative
Posted by thomas on Tuesday, November 3, 2009 at 12:06am.
can someone help me find the antiderivative of:
f'(x) = (x^2-1)/x where f(1)=1/2, and f(-1) = 0
Thanks!
• calculus - antiderivative - drwls, Tuesday, November 3, 2009 at 2:08am
f'(x) = x - 1/x
Integrate one term at a time... | 5 | [
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