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|---|---|---|---|---|---|
Math Age Word Problem
Date: 03/20/2001 at 20:45:11
From: Rosalynd Nicholl
Subject: Math Age Word Problem
My mom and I searched your archives and even looked at your many
examples. We are still stuck! Mom spent all night but had no success.
My fourth grade teacher gave us this problem.
Bob is as old as John will be... | 4 | [
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eigenvalue/eigenvector question
April 18th 2007, 09:10 AM
ruprotein
eigenvalue/eigenvector question
Let T be a linear operator on a vector space V over the field F, and let g(t) be a p;olynomail with coefficients from F. Prove that if x is an eigecvector of T with corresponding eiogenvalue Ξ»
then g(T)x= g(Ξ»)... | 4 | [
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Optimization Problem - Trough
April 13th 2009, 11:13 AM #1
Junior Member
Joined
Dec 2008
Posts
33
Optimization Problem - Trough
A trough is to be made by bending a long rectangular piece of tin L units wide. The cross section of the trough is an isosceles trapezoid with sides making angles of 120 degree ... | 5 | [
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transitive permutation groups have fixed point free elements
September 29th 2010, 10:50 AM #1
Member
Joined
Oct 2008
Posts
130
transitive permutation groups have fixed point free elements
Let $G$ be a permutation group on $n$ letters. So a subgroup of $S_{n}$.
There is a theorem of Fein, Kantor and ... | 4 | [
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Trinomials Lesson Plans & Worksheets :: 61 - 80
Trinomials Teacher Resources
Find Trinomials educational ideas and activities
Showing 61 - 80 of 246 resources
In this expressions and operations worksheet, 9th graders solve and complete 5 different multiple choice problems. First, they determine the complete factoriz... | 4 | [
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# Copyright 2010, 2011, 2012, 2013, 2014 Kevin Ryde # This file is part of Math-PlanePath. # # Math-PlanePath is free software; you can redistribute it and/or modify # it under the terms of the GNU
General Public License as published by the # Free Software Foundation; either version 3, or (at your option) any later # v... | 4 | [
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Sum of roots of a number
May 27th 2010, 12:18 PM #1
Junior Member
Joined
May 2010
Posts
43
Sum of roots of a number
Is there a theorem related to the sum of the roots of a positive number?
For example, for any integer n=1,2,3.....N, and positive number $\lambda$, such that $\lambda _k=\left | \lambd... | 5 | [
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Theory of errors and confusion with roundings
March 6th 2013, 03:51 AM #1
Junior Member
Joined
Aug 2010
Posts
41
Theory of errors and confusion with roundings
With given:
$k_1 = 37.1\pm0.3$
$k_2 = 9.87\pm0.11$
$k_3 = 6.052\pm0.016$
estimate the absolute and relative error for $w = k_1 \cd... | 5 | [
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Linear Algebra
July 24th 2012, 10:14 AM #1
Newbie
Joined
Jul 2012
From
USA
Posts
13
Linear Algebra
Find a unitary matrix U so that for
A = [ 2, 3-3i] [3+3i, 5],A = UDU^H, where D is diagonal
Explain why the determinant of A has to have real determinant
Re: Linear Algebra
note that A is... | 5 | [
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Pythagoras Lesson Plans & Worksheets :: 61 - 80
Pythagoras Teacher Resources
Find Pythagoras educational ideas and activities
Showing 61 - 80 of 231 resources
In this geometry learning exercise, students solve the problem of finding the shortest total distance traveling in straight lines.Β The solution is provided.
... | 4 | [
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Empirical Analysis of Computational and Accuracy Tradeoffs Using Compactly Supported Radial Basis Functions for Surface Reconstruction :: Institutional Repository
Empirical Analysis of Computational and Accuracy Tradeoffs Using Compactly
Supported Radial Basis Functions for Surface Reconstruction
Bryan Mo... | 4 | [
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Noether charge in multisymplectic geometry
P: n/a
On Jun 7, 3:49 pm, ygor.geu...@gmail.com wrote:
> Hi,
>
> I'm currently looking for the mathematical foundation behind the
> claim, often found in field theory/string theory books that the
> noether charge associated to a symmetry of the lagrangian is the
> generator o... | 4 | [
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Diode Resistance
Diode resistance is the resistance which a diode offers in a circuit.
Just like a resistor or any other load in a circuit, a diode offers resistance in a circuit.
Unlike resistors, though, diodes are not linear devices. This means that the resistance of diodes does not vary directly and proportional... | 4 | [
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... | 3,812 | 3812 | |
commutator subgroup eep!
April 30th 2009, 05:03 PM #1
Newbie
Joined
Apr 2009
Posts
3
commutator subgroup eep!
here's the prob
Prove if K is a normal subgroup of a group G then $K'\trianglelefteq G$ where $K'=[K,K] =\langle [a, b]| a, b \in K\rangle$.
I have a theorem i feel like i should be abl... | 4 | [
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Math Help
can you prove that: 1/(cos^2 x-sin^2 x)^2 - 4tan^2 x/ (1-tan^2 x)^2 =1 im kinda stuck right now.
$\frac{1}{(cos^2 x-sin^2 x)^2} - \frac{4tan^2 x}{(1-tan^2 x)^2}$ $= \frac{1}{(cos^2 x-sin^2 x)^2} - \frac{\frac{4sin^2x}{cos^2x}}{(1-\frac{sin^2x}{cos^2x})^2}$ $= \frac{1}{(cos^2 x-sin^2 x)^2} - \
frac{\frac{4si... | 4 | [
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Stacks Project Blog
Flattening stratification
Let f : X β> S be a morphism of schemes. A flattening stratification for f is a disjoint union decomposition of S into locally closed subschemes S_i such that for a morphism of schemes T β> S with T
connected we have that T times_S X β> T is flat if and only if T β> S fact... | 4 | [
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... | 3,815 | 3815 | |
IntroductionRelated WorksMOX Sensors and Experimental SetupMetal Oxide (MOX) Gas SensorsExperiments and Data CollectionAlgorithmPiecewise Linear Trend FilteringSingle SensorParameter SelectionSensor ArrayResults and DiscussionEvaluation MethodologyGeneralized Likelihood RatioSingle Sensor AnalysisParameter SelectionSen... | 4 | [
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Proving
May 6th 2009, 03:38 AM
Roam
Proving
(a) Show that if P is a non-singular nxn matrix then $\lambda$ is an eigenvalue of A if and only if, $\lambda$ is an eigenvalue of $PAP^{-1}$.
(b) Show that if P is a non-singular nxn matrix such that $A^3=o_{n}$. Show that the only possible eigenvalue for A is $\... | 4 | [
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requency
The basic formula for the frequencies of the notes of the equal tempered scale is given by
f[n] = f[0] * (a)^n
where
f[0] = the frequency of one fixed note which must be defined. A common choice is setting the A above middle C (A[4]) at f[0] = 440 Hz.
n = the number of half steps away from the fixed note yo... | 4 | [
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t
How to solve profit and loss problems.
This topic is part of the TCS FREE high school mathematics 'How-to Library'. It shows you how to solve profit and loss problems.
(See the index page for a list of all available topics in the libra... | 4 | [
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A 3*3 matrix space problem
up vote 1 down vote favorite
A matrix subspace $S\subset M_n(C)$ is called "good", if there is two linear independent elements of $S$, says $E_1,E_2$ which are simultaneously singular valued decomposable, i.e., $E_1=UD_1V$ and
$E_2=UD_2V$ with $D_1$, $D_2$ diagonal and $U,V$ unitary.
Now th... | 4 | [
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Standard Deviation
May 1st 2006, 11:11 AM #1
Newbie
Joined
Mar 2006
Posts
6
Standard Deviation
I need help with these two question from my practice final exam. I had trouble with these two problems on my midterm as well and need help knowing how to solve them.
-A population is normally distributed wi... | 4 | [
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On commutative and associative powers
Lajos LΓ³czi:
On commutative and associative powers
Addition and multiplication both obey the law of commutativity
... | 5 | [
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0.06... | 3,822 | 3822 | |
Mechanics: Introduction
Letβs begin from the bases of physics, and with the simple things of it. So, letβs begin with the mechanics topic. We can divide it into 2 parts: Kinematics and Dynamics. The first one is the study
of the motion of the particle, the second one is the study of how the particle react against the e... | 4 | [
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-0.015625,
0.0245... | 3,823 | 3823 | |
Ratio of area of two circles
December 11th 2009, 03:46 PM #1
Junior Member
Joined
Oct 2009
Posts
32
A circle with center O intersects another circle with center P at points C and D. if angle COD = 30 and angle CPD = 60, what is the ratio of the area of the circle with center O to the area of
the circl... | 4 | [
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-0.0213623046875... | 3,824 | 3824 | |
Physics307L:People/Young/Formal2
From OpenWetWare
Charge to Mass Ratio for an electron
Author: Daniel Young
Experimentalists: Arianna Pregenzer-Wenzler and Daniel Young
Location: UNM Department of Physics, Albuquerque, New Mexico, United States
Date of experiment: September 19, 2008
Abstract
To find out the cha... | 5 | [
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... | 3,825 | 3825 | |
No-cloning
From Wikipedia, the free encyclopedia
In physics, the no-cloning theorem is a no-go theorem of quantum mechanics that forbids the creation of identical copies of an arbitrary unknown quantum state. It was stated by Wootters and Zurek^1
and Dieks^2 in 1982, and has profound implications in quantum computing ... | 4 | [
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-0.07861328... | 3,826 | 3826 | |
Base Conversions
This page will show you how do convert from base 10 to base 8 or base 16.
There are probably many ways to do this, I think the method here is best because it just uses basic math that any cheap calculator can d... | 4 | [
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... | 3,827 | 3827 | |
Lucy invested $10,000 in a new mutual fund account exactly
Author Message
TAGS:
Lucy invested $10,000 in a new mutual fund account exactly [#permalink] 03 Sep 2012, 04:47
... | 4 | [
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-0.0673828125,
... | 3,828 | 3828 | |
Revision-complex number
May 6th 2010, 02:27 AM #1
Junior Member
Joined
Mar 2010
From
Malaysia
Posts
26
Revision-complex number
Find all roots of the equations
(a) z^4 + 2z^2 + 4 = 0
My step:
Let u = z^2
u^2 + 2u + 4 = 0
u = -1 + (3)^1/2 and u = -1 - (3)^1/2
i'm stuck at th... | 5 | [
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... | 3,829 | 3829 | |
Hong Kong Space Museum - Astronomy FAQ
Before continuing, let us play an IQ quiz. If a clock is started from 0:00, when will the hour hand, minute hand and second overlap each other?
Let the second hand and minute hand meet every t minutes,
then,
1 / t = 1 / period of the second hand - 1 / period of the minute hand
... | 5 | [
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Union of Countable Sets
January 21st 2009, 09:01 PM #1
Member
Joined
Apr 2008
Posts
123
Union of Countable Sets
Show that a countable union of countable sets is countable (take countable to mean either finite or countably infinite).
So I can see four cases:
Finite union of finite sets - this is... | 5 | [
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... | 3,831 | 3831 | |
or C
Keyah Math Module 13, Level 4
Mathematical Content : Circumference of a circle, geometry, volume of a sphere
What was the size of the meteorite that formed Meteor Crater?
Warm-up Questions
1. Have you ever seen a crater that was formed by a meteor impact?
2. After looking a pictures of Meteor Crater, how wi... | 4 | [
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Complexity and Analysis of Algorithms
Complexity of Algorithms
Efficiency is one of the three major desirable attributes that an algorithm should posses. [What are the other two?] It is also something that we must be able to measure... | 5 | [
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Do there exist small neighborhoods in a classical mechanical system without pairs of focal points?
up vote 5 down vote favorite
2
The question I will ask makes sense in much more generality, but I will leave the translation to the experts, since I'm only looking for a special case (and it would not surprise me if the ... | 4 | [
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Jellymatter
March 31, 2011
Drawing Confidence Ellipses and Ellipsoids
Iβve seen some really bad methods for drawing confidence ellipsoids recently, they all seem to make it really complicated and confusing (and specific). So I thought I would show how to calculate
points on an ellipse corresponding to a covariance ma... | 4 | [
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CoolStatsBlog
India conducted general elections between 7th April and 12th MayΒ , which elected a Member of Parliament to represent each of the 543 constituencies that make up the country.
The opposition BJP won 31% of the votes, which yielded them 282 out of 543 seats in parliament, or 52% of all seats. The BJP allied... | 4 | [
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Limit Proof
November 12th 2009, 08:25 PM
amm345
Limit Proof
let all xn>=0 for all natural numbers n. Assume that sigma(n from 1 to infinity) xn<infinity
Prove that the lim as n tends to infinity of xn=0
November 12th 2009, 09:07 PM
redsoxfan325
Quote:
Assume not; that is, $x_n\to L>0$. Because $... | 5 | [
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-0.00257873535156... | 3,837 | 3837 | |
Parametric Equation of a Tangent Line off a Helix
October 28th 2010, 08:27 PM
blastulation
Parametric Equation of a Tangent Line off a Helix
Suppose $<br /> \vec r = <3cos(t), 3sin(t), 4t><br />$
represents the position of a particle on a helix after t seconds, where z is the height of the particle above the... | 5 | [
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-0.042724609375,
0.0308837... | 3,838 | 3838 | |
count number of i such that ( (p_2*i) mod p_2) == l
up vote 0 down vote favorite
How to determine the number of $i$'s, as fast as possible, such that $1\le i \le L$ and $((a*i+b)\mod p) \mod k = l$, where $1\lt a,b\lt p-1, p$ is a prime number, and $l \lt k \lt L \lt p$.
This problem seems to be too complex, let me b... | 4 | [
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0.04296875,
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-0.021240234375,
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-0... | 3,839 | 3839 | |
How to solve equations with two absolute values and a constant
recall that for real numbers, $|x|^2 = x^2$ thus, by squaring, we can get rid of the absolute values. so square both sides, we get: $(x + 2)^2 + 2|x + 2||x - 3| + (x - 3)^2 = 49$ $\Rightarrow 2|x + 2
||x - 3| = 49 - (x + 2)^2 - (x - 3)^2$ now, you can expan... | 4 | [
-0.003875732421875,
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0.07421875,
0.03076171875,
0.02587890625,
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0.006744384765625,
-0.... | 3,840 | 3840 | |
Exploring Functions with Calculus and Dynamic Software
Calculus can be project-based and inquiry-centered by using dynamic software.
When I tookΒ calculusΒ as an undergraduate, it was presented in a huge lecture hall with hundreds of students and I was well aware that it was known as a βweederβ class for engineers, Pre... | 4 | [
0.01263427734375,
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0.013427734375,
0.007720947265625,
0.037109375,
-0.0771484375,
0.045654... | 3,841 | 3841 | |
Find the value of Z^69
$z = \frac{\sqrt{3}}{2} + \frac{1}{2}i$. Changing to polars gives: $|z| = \sqrt{\left(\frac{\sqrt{3}}{2}\right)^2 + \left(\frac{1}{2}\right)^2}$ $= \sqrt{\frac{3}{4} + \frac{1}{4}}$ $= \sqrt{1}$ $=
1$ $\theta = \arctan{\frac{\frac{1}{2}}{\frac{\sqrt{3}}{2}}}$ $= \arctan{\frac{1}{\sqrt{3}}}$ $= \f... | 5 | [
-0.007232666015625,
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0.0380859375,
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0.001556396484375,
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-0.028564453125,
-0.059326171875,... | 3,842 | 3842 | |
Sandwich principle
May 12th 2008, 10:11 AM #1
Sandwich principle
Hi guys!
Ok, last problem today! I've already read any other posts on the sandwich principle, but I've never seen it before today, and my chapter doesn't explain it, just gives a question on it!
Let $(a_{n}),(x_{n})$ and $(b_{n})$ be sequen... | 5 | [
-0.10302734375,
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0.03564453125,
-0.045166015625,
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0.11669921875,
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0.043212890625,
0.0164794921875,
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0.0791015625,
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-0.0166015625,
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0.053955078125,
0.09765625,
-0.0223388671... | 3,843 | 3843 | |
find the good series solution to the ODE
July 18th 2011, 04:51 PM #1
Newbie
Joined
May 2010
Posts
13
find the good series solution to the ODE
$y''+t^2y'+2ty = 0, y(0) = 1, y'(0) = 0$
This is what I did:
$P(t) = 1, Q(t) = t^2, R(t) = 2t$
So, $t_0$ is such that $P(t_0) eq 0 \forall t_0 \in \m... | 5 | [
-0.119140625,
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-0.01373291015625,
0.00732421875,
-0... | 3,844 | 3844 | |
A cubic problem
February 16th 2010, 09:56 PM #1
Newbie
Joined
Feb 2010
Posts
3
A cubic problem
A βrogue satelliteβ has its distance from Earth, d thousand kilometres, modelled by a cubic function of time, t days after launch. After 1 day it reaches a maximum distance from Earth of 4000
kilometres, th... | 4 | [
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... | 3,845 | 3845 | |
Orthogonal Trajectories and Cauchy-Riemann Equations
March 17th 2010, 01:41 PM #1
Junior Member
Joined
Apr 2008
Posts
31
Orthogonal Trajectories and Cauchy-Riemann Equations
Hello,
This is a snippet from a book:
I am trying to apply the same principle to:
$x^2+(y-c)^2=1+c^2$
Rearra... | 5 | [
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... | 3,846 | 3846 | |
Quadratic Formula Help
February 20th 2010, 04:49 AM #1
Newbie
Joined
Feb 2010
From
Originally from Indianapolis, Indiana - but currently live in Haarlem, The Netherlands
Posts
18
Quadratic Formula Help
I am working on a problem which requires the quadratic formula to solve. The problem is as follows:... | 4 | [
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... | 3,847 | 3847 | |
LIGHT AND ELECTRON SPIN
(Light/Electron Theory Update)
Copyright (C)... | 4 | [
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-0.01483154296875,
-0.09570... | 3,848 | 3848 | |
Finding the vertex at a given point?
Find b and c so that the parabola What do I do here?
Use completing the square: Convert $y$ to $y=(x-a)^2+q$ Where $(a,q)$ are the coordinates of the vertex.
using the second method the derivative is -8x + x right? set that = 0 0= -8x + x 0= X(-8+1) so final answer is 0?
nvm b = ... | 4 | [
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-0.011474609375,
-... | 3,849 | 3849 | |
[Maxima] Homogeneous differential equations
Jaime Villate villate at fe.up.pt
Tue Sep 25 02:01:03 CDT 2007
On Mon, 2007-09-24 at 17:06 -0300, Ismael Garrido wrote:
> I'm trying to solve Homogeneous ODEs and I get the following:
>
> Maxima 5.10.0 http://maxima.sourceforge.net
> Using Lisp GNU Common Lisp (GCL) GCL 2.... | 5 | [
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0.00469970703125,
-0.074707031... | 3,850 | 3850 | |
Transitivity of parallel lines
August 6th 2006, 09:21 AM #1
Transitivity of parallel lines
I need to prove that $a\parallel b \wedge b\parallel c \Rightarrow a\parallel c$ if a,b,c are not in the same plane.
See attachment.
If we put point B in plane $\alpha$ then we get line d that is parallel to line ... | 4 | [
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0.04467773... | 3,851 | 3851 | |
Not Sure if I did this correctly with Trig Identities
October 29th 2012, 04:39 PM #1
Newbie
Joined
Oct 2012
From
Earth
Posts
1
Not Sure if I did this correctly with Trig Identities
Algebra seems like a blur, so I need a bit of help with this problem.(~)==theta
The original problem is this, and yo... | 4 | [
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0.004730224609375,
0.0... | 3,852 | 3852 | |
Posts from December 2010 on Why?
I only caught part of the one Ronnie show this year, but it was a classic. The best sketch I watched involved fixing your Blackberry:
For non-UK people, orange is a mobile service provider. The Xbox 360 joke is brilliant!
R programming books
My sabbatical is rapidly coming to an end,... | 5 | [
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0.0181884765625,
... | 3,853 | 3853 | |
Find the critical numbers?
November 29th 2009, 11:38 AM #1
Member
Joined
Jan 2009
Posts
197
How to find the critical number of the given function:
$f(x)= x^3(x-2)^2$
Attempt:
$f'(x)=(x^3)(2[x-2][1])+(x-2)^2(3x^2)$
Now we have to equate f'(x) to zero
$f'(x)=(x^3)(2[x-2])+(x-2)^2(3x^2... | 4 | [
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0.08935546875,
-0.11083984375,
0.0277099609375,
-0.007354736328125,
-0.0366210... | 3,854 | 3854 | |
actorial
Two way Factorial arrangement on a CRD
Field marks:
β’ Treatments are combinations of two factors, such as chemical compositions and methods of applying chemicals. This is an arrangement of treatments within a CRD design.
β’ Replications of treatments are assigned completely at random to independent exp... | 4 | [
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0.018310546875,
0.0036468505859375,
-0... | 3,855 | 3855 | |
factoring question
January 30th 2013, 04:33 AM #1
Newbie
Joined
Sep 2012
From
CT
Posts
5
factoring question
Could someone help me with the following question?
a^3 + a^2 - a - 1
I can't seem so get to the answer. Id love to know how you arrive to the answer too.
Thanks
Re: factoring q... | 4 | [
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TI-34 - M
TI-34 MultiViewβ’
Scientific Calculator
n
x10
key ..............................................................................20
Pi .........................................................................................22
Copyright Β© 2007 Texas Instruments Incorporated
1
Summary of Contents
... | 5 | [
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Euler's Nonstandard Nonsense
Eulerβs Nonstandard Nonsense
Mattβs post on the harmonic series has inspired me to share with you some nonsense due to Euler, leading to a beautiful non-proof of the following identity:
$\displaystyle 1 \,+\, \frac{1}{4} \,+\, \frac{1}{9} \,+\, \frac{1}... | 5 | [
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... | 3,858 | 3858 | |
CTK Insights
Recent Comments
β’ Angelika on Beautiful Geometry
24 Apr
This is to simply document my observation which I've been mulling over for a long time until very recently.
A couple of streets that I daily drive over are lined with trees whose branches seem to exhibit strange growth pattern. While their older... | 5 | [
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0.091796875,
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Nonlinear second order differential equation
What is the solution of the follwoing differential equation $\frac{\partial^{2}y}{\partial x^{2}}-ay^{-1}\frac{dy}{dx}=0$ where $a$ is a constant.
Ok, This method works for all equations of the form $y'' = f(y', y)$. Now Assume a new variable, v = y'. So $\frac{\mathrm{d}v}... | 5 | [
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0.0066833... | 3,860 | 3860 | |
Autonomous systems - stability of dy/dt - y = 1
February 27th 2013, 08:48 PM #1
Newbie
Joined
Aug 2011
Posts
15
Autonomous systems - stability of dy/dt - y = 1
a) Solve dy/dt - y = 1
b) What should be the value of y(0) = yo so that the solution to part a is finite even when t -> infinity
This is... | 5 | [
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Intersection between a line and triangle using plucker coordinates
The intersection between a line and a triangle
Problem:
Input: The line L is given as input in the form of two end points. The input for triangle T is given in the form of thre... | 4 | [
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Variety of Calculus questions
February 7th 2013, 01:13 PM #1
Member
Joined
Dec 2012
From
NY
Posts
105
Thanks
1
Left and Right hand sums.
t (s) 0 12 24 36 48 60
v (ft/s) 32 28 24 22 24 28
Readings at 12 second intervals. Estimate distance traveled Deltax= 12
1. estimate distanc... | 4 | [
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Sinusodial distance formula
December 5th 2007, 09:36 AM #1
Sinusodial distance formula
Well most of you know that the formula of distance in an oscillating (harmonic) movement is x = r.coswt. I know how to get at this formula using the circular movement. But I gotta reach it by
using the acceleration.
K.... | 5 | [
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... | 3,864 | 3864 | |
MathGroup Archive: July 2001 [00197]
[Date Index] [Thread Index] [Author Index]
Re: Logic and Truth Tables with Mathematica?
β’ To: mathgroup at smc.vnet.net
β’ Subject: [mg29833] Re: Logic and Truth Tables with Mathematica?
β’ From: Tom... | 4 | [
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SparkNotes: SAT Subject Test: Math Level 2: Logarithms
4.1 Order of Operations 4.7 Percents
4.2 Numbers 4.8 Exponents
4.3 Factors 4.9 Roots and Radicals
4.4 Multiples 4.10 Logarithms
4.5 Fractions 4.11 Review Questions
4.6 Decimals 4.12 Explanations
... | 4 | [
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Quickie #6
Find the sum of the series: . . $1(1!) + 2(2!) + 3(3!) + \cdots + n(n!)$
Last edited by ThePerfectHacker; December 30th 2006 at 02:35 PM.
I don't know where it was solved, but even without (explicit) induction: $<br /> k\left( {k!} \right) = \left( {k + 1} \right)k! - k! = \left( {k + 1} \right)! - k!<br /... | 5 | [
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vector field flow line calculation
August 26th 2010, 03:58 AM #1
Member
Joined
Jul 2010
Posts
99
vector field flow line calculation
Hi, can anyone please help me with this Flow Line question? I've always had trouble with understanding Flow Line question. Please help me with some detailed explanation. I r... | 5 | [
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Oil Mogul
You are an oil mogul considering the purchase of drilling rights to an as yet unexplored tract of land.
The wellβs expected value to its current owners is uniformly distributed over [$1..$100]. (i.e., a 1% chance itβs worth each value b/w $1..$100, inclusive).
Because you have greater economies of scale tha... | 5 | [
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Population standard deviation, check answer please
August 9th 2006, 08:49 AM #1
Member
Joined
Jun 2006
Posts
165
Find the population standard deviation of the following frequency distribution.
Score Frequency
1 9
2 15
3 6
total=30
so, 1*9+2*15+3*6=57
57/30=1.9
and, 9(1-1... | 4 | [
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area of triangle using 3d vectors
April 25th 2009, 03:25 PM #1
Junior Member
Joined
Jan 2009
Posts
26
area of triangle using 3d vectors
can someone explain how to do this problem, i got the first part correct but i dont understand how to get the area exactly. THanks!
Consider the points below. P(1, 0... | 5 | [
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Math Help
September 13th 2010, 05:15 AM #1
MHF Contributor
Joined
Dec 2007
From
Ottawa, Canada
Posts
3,080
Thanks
66
Weighing in....
4 bags of coins:
2 of them contain 100 10-ounce coins, the other 2 contain 100 12-ounce coins.
You are allowed to use a regular weigh scale (one that tell... | 4 | [
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... | 3,872 | 3872 | |
The Geometric Distribution
\(\newcommand{\P}{\mathbb{P}}\) \(\newcommand{\E}{\mathbb{E}}\) \(\newcommand{\R}{\mathbb{R}}\) \(\newcommand{\N}{\mathbb{N}}\) \(\newcommand{\bs}{\boldsymbol}\) \(\newcommand{\var}{\text{var}}\) \(\
newcommand{\skew}{\text{skew}}\) \(\newcommand{\kurt}{\text{kurt}}\)
1. 3
3. The Geometric... | 5 | [
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homogeneus matrix question..
November 25th 2009, 10:32 AM #1
MHF Contributor
Joined
Nov 2008
Posts
1,401
homogeneus matrix question..
$<br /> \begin{pmatrix}<br /> 3 &0 &0 &-1 &0 &0 \\ <br /> 2& 0& 0 & 0 & 0 &-4 \\ <br /> 8&2 &0 &-3 &-1 &0 \\ <br /> 0& 1& 0& -1& 0& 0\\ <br /> 0& 0 &1 &0 &-1 &0 <br /> \en... | 4 | [
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0.01... | 3,874 | 3874 | |
W
10
WORD PROBLEMS
Examples
Problems
WORD PROBLEMS require practice in translating verbal language into algebraic language. See Lesson 1, Problem 8. Yet, word problems fall into distinct types. Below are some examples.
Example 1. ax Β± b = c. All problems like the following lead eventually to an equation in that si... | 4 | [
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Ball & Beam: State-Space Methods for Controller Design
Key MATLAB commands used in this tutorial are: ss , place , lsim
Contents
The state-space representation of the ball and beam example is given below:
(1)
(2)
Unlike the previous examples where we controlled the gear's angle to control the beam and ball, here ... | 4 | [
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Permutations and combinations
Before we discuss permutations we are going to have a look at what the words combination means and permutation. A Waldorf salad is a mix of among other things celeriac, walnuts and lettuce. It
doesn't matter in what order we add our ingredients but if we have a combination to our padlock ... | 4 | [
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Proving a simple limit?
July 28th 2010, 08:51 AM #1
Proving a simple limit?
The following problem seems very simple, and indeed I'm sure the answer isn't hard at all. I know how to prove the limits of polynomial functions, using the epsilon-delta definition of a limit,
by factoring certain parts, using certai... | 4 | [
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0.... | 3,878 | 3878 | |
more Differential Equations
January 18th 2010, 02:06 PM #1
Newbie
Joined
Jan 2010
Posts
6
more Differential Equations
A pool of 60,000 gal water is contaminated with 5kg of dye. The filter can remove the dye and pumps at a rate of 200 gal/min find the initial value problem. let q(t) be the amount of dye ... | 5 | [
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... | 3,879 | 3879 | |
Maclaurin Polynomial
August 5th 2010, 02:53 PM #1
Junior Member
Joined
Jun 2008
From
Sanger, CA
Posts
58
Q: Find the Maclaurin polynomial of order 3 for the function f(x) = e^(-2x).
I know that the Maclaurin polynomial for e^x = 1 + x + x^2/2! + x^3/3! + ...
So my question is if I would have... | 5 | [
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-0.0... | 3,880 | 3880 | |
Solve (z-i)^n = (z+i)^n
I'm doing a multiple part question, and I'm stuck at the second step:
http://i.imgur.com/0yA8Z.png
I've shown that e^iΞΈ = cosΞΈ + isinΞΈ
Now I need to show for (z-i)^n - (z+i)^n = 0
The roots are z = cot(rPi/n) r = 1, 2, ... (n-1)
I've tried a few different approaches,... | 5 | [
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-0.0252685546... | 3,881 | 3881 | |
why is it that ln(1+u)^(1/u)=1
November 10th 2011, 09:07 PM
Barthayn
why is it that ln(1+u)^(1/u)=1
why is it that as the limit of u approaches zero of ln(u+1)^(1/u)=1? I am trying to figure this out because I want to see the proof of the derivative of lnx = 1/x. I know that ln(u+1)^(1/u)=1 and
when I plug i... | 5 | [
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-0.... | 3,882 | 3882 | |
al
MuPAD
MuPAD deserves the full support of the Linux community, and if you use mathematics in any way, then MuPAD should find a home on your system.
There are a few basic number theory functions in the kernel; others are contained in the numlib library.
>> isprime(997);
TRUE
>> Fa... | 5 | [
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compound interest
April 26th 2008, 12:28 PM
Babs0201
compound interest
Mary wants to take out a loan. Suppose she can afford to make monthly payments of 200 dollars and the bank charges interest at an annual rate of 5 percent, compounded monthly. What is the maximum
amount that Mary could afford to borrow if... | 5 | [
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CALC -- integrals!
Posted by anonymous on Monday, February 4, 2008 at 2:47pm.
Iodine-131 is used to treat hypo-thyroidism since it is preferentially absorbed by the thyroid and typically involves a total radiation dosage of 10,000,000 millirem. Iodine-131 has a half-life of
eight days.
1. Set up the appropriate integ... | 5 | [
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GTU previous years question papers -BE- Sem-III - Fluid Mechanics -Dec 2010
GTU previous years question papers -BE- Sem-III β Fluid Mechanics -Dec 2010
GTU previous years question papers
GUJARAT TECHNOLOGICAL UNIVERSITY
B.E. Sem-III Regular / Remedial Examination December 2010
Subject code: 130602
Subject Name: Fl... | 4 | [
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[ << ] [ < ] [ Up ] [ > ] [ >> ] [Top] [Contents] [Index] [ ? ]
16.1.5 FFT Multiplication
At large to very large sizes a Fermat style FFT multiplication is used, following SchΓΆnhage and Strassen (see section References). Descriptions of FFTs in various forms can be found in many
textbooks, for instance Knuth s... | 4 | [
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"tiger" story problems
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ¬βββ¬ββββββββββββββββββββββββ
β (1) Simple Interest ... | 4 | [
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math geo please help?
Posted by mathishard on Saturday, June 4, 2011 at 1:40am.
finals next weekk D:
ten less than three times the complement of an angle is it supplement.
find the measure of the supplement?
β’ math geo please help? - drwls, Saturday, June 4, 2011 at 1:52am
Write that as an equation. Let x be... | 4 | [
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Derivative of ln(7)7^z
1. September 29th 2010, 10:10 PM #1
2. September 29th 2010, 10:32 PM #2
3. September 29th 2010, 10:33 PM #3
Logarithmic differentiation:
$y = \ln(7)7^z \Leftrightarrow \ln(y) = \ln(\ln(7)7^z) = \ln\ln(7)+\ln(7)^z = \ln\ln(7)+z\ln(7) [/Math] [Math] \Rightarrow (\frac{1}{y})... | 5 | [
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The Cubic Growth Discovery Model
The Cubic Growth Discovery Model
A few months ago, I posited an
oil discovery growth model
which I consider follows reality better than any currently available model (
which basically consists of none, since everyone bar a few contrarians seem to consider the Logistic model the end... | 4 | [
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0.00982666015... | 3,891 | 3891 | |
List Operations for Paired t Test on TI-83/84
Copyright Β© 2003β2014 by Stan Brown, Oak Road Systems
Summary: In a paired t test, you find the difference between data pairs. That can be tedious, and itβs easy to drop a minus sign. This page shows you how to use TI-83/84 list operations to find the
differences.
Person... | 5 | [
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Homework Help
Posted by April on Friday, March 15, 2013 at 2:01am.
A box with no top is to be constructed from a piece of cardboard whose length measures 12 inches more than its width. the box is formed by cutting squares that measures 4 inches on each sides from 4
corners and then folding up the sides. If the volume ... | 4 | [
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Integrals 215 problem 12.html
1. Trignonometric substitutions.
When using Maple to aid you in performing integrals which require trigonometric substitutions, you may have work a bit harder to get the result in the form that you want. Let us suppose that we wish
to compute the integral . From the form of the denominato... | 5 | [
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Trinomials Lesson Plans & Worksheets :: 81 - 100
Trinomials Teacher Resources
Find Trinomials educational ideas and activities
Showing 81 - 100 of 246 resources
In this Algebra I worksheet, 9th graders factor trinomials in the form ax2 Β + bx + c.Β The one page interactive worksheet contains five multiple choice ques... | 4 | [
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Extremum of f
March 17th 2011, 12:40 AM
problem
Extremum of f
If $f(x,y) = sin x+ siny + sin (x+y)$, $0\le x\le2\pi$, $0\le y \le 2\pi$, find the extremum of $f$.
I find $f_x$and $f_y$ and equate them to zero. Then from these two equations, I get $cos x= cos y$.
Can anyone help me to proceed from here ... | 4 | [
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Maximum and Minimum of multivariable calc
March 17th 2009, 07:12 PM #1
Junior Member
Joined
Sep 2008
Posts
27
Maximum and Minimum of multivariable calc
Find the absolute maximum and minimum values of f on the set D.
f(x, y) = xy^2 + 9 β D = {(x, y) | x β₯ 0, y β₯ 0, x^2 + y^2 β€ 3}
Last edited by m... | 5 | [
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probablility with balls
May 30th 2010, 07:07 AM #1
Super Member
Joined
Oct 2008
From
Bristol, England
Posts
897
probablility with balls
Hi, this is my question:
Harry has a bag of different coloured balls, 3 red balls, 2 yellow balls and 1 blue ball, identical except for their colour.
Harry ... | 4 | [
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Directional derivatives
April 5th 2011, 10:28 PM #1
Senior Member
Joined
Apr 2010
Posts
487
Directional derivatives
The question:
A skier is on a mountain described by the equation $h(x, y) = 2000 - x^4/10^8 - y^2/10^2$ at the point (100, 1). He skis down the mountain, always moving in the direction ... | 5 | [
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