content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Impact energy absorbing structure - Patent # 7326466 - PatentGenius
Impact energy absorbing structure
7326466 Impact energy absorbing structure
Patent ... | 4 | [
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0.02880859... | 15,900 | 15900 | |
Find all prime numbers p,q,r such that (p/q)-(4/(r+1))=1
Find all prime numbers p,q,r such that (p/q)-(4/(r+1))=1 anybody can help me tq
Last edited by CaptainBlack; September 23rd 2009 at 11:40 PM.
After multiplying your equation by q times (r+1) we obtain: $<br /> p(r+1)-4 q = q(r+1)<br />$ It's equivalent to: $<br... | 4 | [
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system of 3 equations
solve for x,y, and z: x+y = 3z x^2 + y^2 = 5z x^3 + y^3 = 9z
i still don't really see how its solved without some very lengthy, tedious algebra. what's the next step
Hello, jmedsy! I think I've solved it . . . I'll get you started. Quote: Solve for $x,y,z\!:\;\;\begin{array}{cccc}x+y &=& 3z & [1... | 4 | [
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0.0294189453125,
-0.0673828125... | 15,902 | 15902 | |
Complex Analysis
March 19th 2010, 01:37 PM #1
Complex Analysis
Let f be a continuous function on $D=\left\{z:|z|=1\right\}$. Laat $\gamma:[0,2\pi]\to D$, defined by $\gamma(t)=e^{it}$.
Define the function $F$ as follows:
$F(z) = f(z)$ if $|z|=1$
$F(z) = \frac{1}{2\pi i}\int_\gamma \frac{f(\zeta)}{\ze... | 5 | [
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Finding the radius of a Circle Touching a Parabola and the Axis
May 26th 2011, 03:08 PM #1
Member
Joined
Mar 2011
Posts
99
Hi Forum!
I have a little problem with a question:
What is the radius of a a circle that touches the parabola 1/2x² at (2,2) and the x-axis?
Here the derivative of our ... | 4 | [
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Vector Algebra
First, the problem, as you stated it, does not make sense! An "equation" is not a geometric object and you cannot talk about something being parallel to an "equation"!
I suspect that you mean "Find a unit vector parallel to the graph of the equation 2x-z= 4". Of course, then, the answer cannot be "[itex... | 4 | [
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Math Help
For any integrable function on $[0,1]$ compute the value of $\underset{n\to \infty }{\mathop{\lim }}\,\frac{1}{n}\sum\limits_{k=0}^{n-1}{(n-k)\int_{\frac{k}{n}}^{\frac{k+1}{n}}{f(x)\,dx}}.$
Write $\sum\limits_{k=0}^{n-1}{(n-k)\int_{\frac{k}{n}}^{\frac{k+1}{n}}{f}}=\sum\limi ts_{k=0}^{n-1}{\sum\limits_{j=k+1... | 5 | [
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Inverse Relationship Lesson Plans & Worksheets :: 81 - 100
Inverse Relationship Teacher Resources
Find Inverse Relationship educational ideas and activities
Showing 81 - 100 of 754 resources
In this algebra worksheet, students find the inverse of an equations. They graph their solutions and analyze it. There are 8 q... | 4 | [
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Finding a constant to make a perfect square trinomial
find a constant to add to the binomial so that it becomes a perfect square trinomial. x^2-15x
Divide the coefficient of the linear term by 2 (ie divide b by 2) $(x+7.5)^2 + k = x^2 - 15x + 0$ $k = -(7.5^2)$ ----------------------------------------------------------... | 4 | [
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exercises (functions )
June 12th 2010, 10:03 AM #1
Newbie
Joined
Jun 2010
Posts
5
exercises (functions )
1. If f(x) = x^2 + 3x - 7 and g(x) = 3x - 4, then g(f(-3)) =
2. If F(x) = √X^2=1 G(x) = 3x - 2 then a formula for (FoG)(x) is :
3. If F(x) = x/x-1 G(x) = 2x + 1 then a formula for (FoG)(x)... | 4 | [
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The sum (to infinity) of a geometric series.
November 25th 2009, 01:34 AM #1
Junior Member
Joined
Nov 2009
Posts
42
The sum (to infinity) of a geometric series.
I'm trying to calculate the sum of to infinity of the geometric series $99,33,11,...$
$S_{\infty} = \frac{a}{1-r}$
$S_{\infty} = \frac... | 4 | [
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Patent US7028064 - Optimized discrete fourier transform method and apparatus using prime factor algorithm
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation of U.S. patent application Ser. No. 10/120,971, filed on Apr. 11, 2002, which issued on Mar. 9, 2004 as U.S. Pat. No. 6,704,760.
BACKGROU... | 4 | [
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(The Plasma Universe Wikipedia-like Encyclopedia)
Current sheet
From (The Plasma Universe Wikipedia-like Encyclopedia)
A current sheet is an electrical current that is confined to a surface, rather than being spread through a volume of space. Current sheets feature in magnetohydrodynamics (MHD), the study of the
beh... | 5 | [
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Finding point of intersection algebraically
February 12th 2008, 10:44 AM
~NeonFire372~
Finding point of intersection algebraically
Another question for a test tomorrow that I don't understand... I know how to find the point of intersection for two lines on a graph easily but I don't understand how you do it alge... | 4 | [
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Explicit expressions for creation/annihilation operator of the free scalar field
I've been trying to work my way through some of my lecture notes, and have hit this snag. (n.b. I use [itex]k_0 \equiv +\sqrt{\vec{k}^2 + m^2}[/itex])
We have
[tex]a(q) = \int d^3 x e^{iqx} \{ q_0 \phi(x) + i \pi(x) \} [/tex]
[tex]a^{\dag... | 4 | [
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Finding the MLE of a Poisson Distribution
1. The problem statement, all variables and given/known data
Suppose that X has a poisson distribution with parameter [tex] \lambda [/tex]. Given a random sample of n observations, find the MLE of [tex] \lambda [/tex], [tex] \hat{\lambda} [/tex].
2. Relevant equations
The MLE... | 4 | [
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Physics Forums - D'Alembert/Virtual Work Problem
I have a question with process when using D'Alembert/Virtual Work.
I have the example question:
A uniform plank of mass M is leaning against a smooth wall and makes an angle α with the smooth floor. The lower end of the plank is connected to the base of the wall with ... | 4 | [
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Patente US5574638 - Method of optimal scaling of variables in a multivariable predictive controller utilizing range control
BACKGROUND OF THE INVENTION
The present invention relates to control systems, and more particularly, to a method of determining the weight of the controlled and manipulated variables of a robust ... | 4 | [
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Conversion from Parametric to Cartesian
Thanks. I got those questions correct.
Further on I'm faced with converting this into cartesian:
[tex]$\displaylines{
... | 4 | [
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Logic: formulas, proof
November 27th 2010, 12:28 PM #1
Newbie
Joined
Nov 2010
Posts
5
Logic: formulas, proof
Hello!
I have just started learning logic and have to idea how to solve this, can anyone help with ideas please?
Prove that a formula that contains only variables and equivalence and nega... | 4 | [
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Equation of the tangent to a perpendicular lin
June 17th 2012, 12:56 PM
mgmanoj
Equation of the tangent to a perpendicular lin
Can someone help me to solve this : Find the equation of the tangent to the curve x^2 -2xy + 2y^2 -7x + 6y + 6 = 0 which is perpendicular to 6x + 5y -4 = 0
June 17th 2012, 01:12 PM
Pla... | 4 | [
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atrix
Matrix Reference Manual
Matrix Calculus
Go to: Introduction, Notation, Index
Contents
• Notation
• Derivatives of Linear Produ... | 4 | [
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Comment on
There is a theorem by Gauss which shows that finding M as the sum of three triangle numbers is equivalent to finding 8M+3 as the sum of three odd squares. That is, if
8M + 3 = (2A+1)^2 + (2B+1)^2 + (2C+1)^2
then
M = trinum(A) + trinum(B) + trinum(C)
[download]
The computation starts with a bigger number,... | 4 | [
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N random points in a circle
January 10th 2009, 11:31 AM
hpinvent
N random points in a circle
How can I calculate the minimum distance from the center to N points uniformly distributed in a circle? In other words, I want to find the distance to the closest point from the center. Does this
distance decrease wi... | 5 | [
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Fibonaci sequence terms.
How to prove that (f(n+1)^2=f(n)f(n+2)+(-1)^n where f(n), f(n+1),f(n+2) are fibonaci sequence terms. I have no idea where to start.
Last edited by mr fantastic; May 6th 2011 at 01:59 PM. Reason: Re-titled.
Thank you dwsmith for answering. You are right: The condition is n>3 or n=3. I forgot t... | 5 | [
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One more puzzle
February 15th 2011, 10:58 PM #1
Newbie
Joined
Feb 2011
Posts
8
One more puzzle
Fill nine squares with numbers between 1 to 9
Rule: total of numbers from any side will be equal to 15.
If it have any formula, please tell me.
Here's a method for a 4-by-4 Magic Square.
We... | 4 | [
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... | 15,925 | 15925 | |
Multiplication and Division
Sample Problem
Solve the equation 8x = 5x + 24.
The first thing we do is subtract 5x from each side to find that 3x = 24.
We haven't talked yet about what to do with this sort of equation, but you can figure it out by thinking of the balance scale. If three copies of x weigh a total of 24... | 4 | [
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Patente US20030198348 - Method and apparatus for encrypting/decrypting data
TECHNICAL FIELD
[0001] The present invention relates to a method and apparatus for encrypting/decrypting data.
BACKGROUND
[0002] When dealing with private and confidential information there is frequently a need to ensure that the information... | 4 | [
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-0.004821777... | 15,927 | 15927 | |
Math Help
February 27th 2008, 02:41 PM #1
Newbie
Joined
Feb 2008
Posts
7
Sets
Let $P(S)$ be denoted as the power set of $S$ and,
Let $S \oplus T$ be denoted as the symmetric diference of the sets $S$ and $T$ and,
Let $|S|$ be denoted as the # of elements in set S.
Then, given $|A| = 10$ a... | 4 | [
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-0.0366210937... | 15,928 | 15928 | |
Spectral Method for optimization
trying to find a global min/max while avoiding saddle points ..... If we expand a polynomial of several dimensions we get the following:
f(x + del x) = f(x) + del x * g + .5 (del x) H (del x)^t + O(||x||^3) : g is the gradient, H is the Hessian.
then we can take the eigenvectors of H ... | 4 | [
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Acceleration as a function of displacement
actually as it turned out:
a(t) = 6 theta
better put as
a(t) = 6 theta(t)
a(t) is just the second derative of theta(t), so
theta''(t) = 6 theta(t)
tossing away the 6 mentally for a second, what function equals its own second derative? e does! so let's play with that and ... | 5 | [
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0.10... | 15,930 | 15930 | |
Some math problems i cant seem to figure out? Part 3
January 5th 2009, 07:09 PM
rotw121
Some math problems i cant seem to figure out? Part 3
1. use the compound interest formula to determine the final value of the given amount: $1,000 at 8% compounded annually for 3 years
2. Write in logarithmic form: 2^-2=... | 4 | [
0.00653076171875,
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How long will it take to fall?
August 25th 2006, 02:24 PM #1
How long will it take to fall?
Mathguru tells me this is where physics questions go, so I'll post my question here.
I am having trouble understanding acceleration. Namely, how to calculate how fast an object will get to...
So here is my made u... | 5 | [
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Complex Analysis question
Hello,
I'm sorry if I'm not posting this to the correct place - this is my first post on PhysicsForums.com
My question regards derivatives of analytic functions. Here it goes:
Let
w(z) = u(x,y) +iv(x,y)... | 4 | [
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differential equation world problems
September 24th 2007, 08:00 PM
xfyz
differential equation world problems
A learning curve is the graph of a function P(t), the performance of someone learning a skill as a function of training time t. The derivative dP/dt represents the rate at which performance
improves.
... | 5 | [
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-0.000652313232... | 15,934 | 15934 | |
SAT Problem
If g(x) = x * 2^x, then g(a+1) - g(a)= (a) (a+2)2^a (b) (2a+1)2^a (c) (2a-1)2^1 (d) (a+1)2^a+1 (e) (a)2^a+1
Thank you very very much! (sorry but) another question I have: Which of the following CANNOT represent the degree measure of an equiangular polygon? (a) 165 (b) 162 (c) 140 (d) 125 (e) 90
The intern... | 4 | [
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-0.06005859375,
-0.0133... | 15,935 | 15935 | |
NoScale model F-local term
In case you have the Kahler and super- potential [itex]K,W[/itex]:
[itex] K(T,S,C) = -log (S +S^{*}) -3 log ( T+ T^{*} - C C^{*}) [/itex]
[itex] W(T,S,C)= C^{3} + d e^{-aS} +b [/itex]
with [itex]T,S,C[/itex] chiral super fields, [itex]b,d[/itex] complex numbers and [itex]a>0[/itex].
I tried... | 4 | [
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... | 15,936 | 15936 | |
Lenses Question help!
They want to know what angle the top of the man makes at the centre of the lens. This means that
[tex]\tan\theta=\frac{1.8}{40}[/tex]
since the base is 40m and the perpendicular is 1.8m of the right angle that the man subtends at the centre of the lens.
To calculate the image size you need to firs... | 4 | [
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Sine Rule Problem; WHY 2 Answers!??
July 6th 2009, 07:58 PM #1
Newbie
Joined
Dec 2008
Posts
19
Sine Rule Problem; WHY 2 Answers!??
Alright, so...
I put sinx/70=sin40/46. so i got the answer x=78
but there are two answers? 102 and 78?
Someone explained to me that you subtract 78 from 18... | 4 | [
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-0.05224609... | 15,938 | 15938 | |
Expected value of Sampling Distribution
November 9th 2011, 03:22 PM #1
Member
Joined
Mar 2008
Posts
93
Thanks
1
Expected value of Sampling Distribution
Consider the following population of ten scores: 4,4,4,5,5,6,6,8,9,9.
What is the expected value of the sampling distribution of the mean for n ... | 4 | [
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differntiable functions
October 24th 2007, 03:56 AM #1
Member
Joined
Oct 2007
From
Nevada
Posts
188
differntiable functions
The twice-differentiable function f is defined for all real numbers and satisies the following conditions:
f(0) = 2
f'(0) = -4
f''(0) = 3
The function g is giv... | 5 | [
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0.044433... | 15,940 | 15940 | |
Double delta-function potential
mattmatt321
In the end, the even wave function solution yields (ħk/mα) = e^-2ka + 1, and the odd wave function solution yields (ħk/mα) = 1 - e^-2ka.
[itex]\hbar[/itex] should be squared in both equations.
3. The attempt at a solution
Based on these solutions, I'm asked a few questi... | 4 | [
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Binomial Approximation to Poisson Distribution
September 23rd 2011, 09:42 AM
Vinod
Binomial Approximation to Poisson Distribution
Poisson distribution as a limiting case of binomial probability distribution under the following conditions
1)n= number of trials indefinitely large. 2)p= constant probability of ... | 4 | [
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Summary: mathematics of computation
volume 37,number 155
JULY 1981
Optimal Numerical Differentiation Using
Three Function Evaluations
By J. Marshall Ash and Roger L. Jones
Abstract. Approximation off'(x) by a difference quotient of the form
h~l{aj(x + bxh) + a2f(x + b2h) + a3f(x + b3h)]
is found to be optimized for a w... | 4 | [
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Speed of Boat in Still Water
December 4th 2008, 02:36 PM #1
MHF Contributor
Joined
Jul 2008
From
NYC
Posts
1,489
Speed of Boat in Still Water
Debbie traveled by boat 5 miles upstream to fish in her favorite spot. Because of the 4 mph current, it took her 20 minutes longer to get there than to return.... | 4 | [
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0.00259... | 15,944 | 15944 | |
Inductive Proof of Inequality
October 13th 2010, 05:43 PM #1
Member
Joined
Aug 2008
Posts
225
Inductive Proof of Inequality
Prove by induction that 3^n >= 1 + 2^n
I am trying to prove this by showing 3^(k+1) = 3*3^k >= 1 + 2^(k+1), so I was using an inductive substitution of putting 3(1+2^k) on the l... | 4 | [
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-0.05810546875,
0.0344... | 15,945 | 15945 | |
Spivak's Calculus - Proof
July 22nd 2011, 10:24 AM #1
Member
Joined
Mar 2010
Posts
78
Spivak's Calculus - Proof
(d) For which numbers $a$ is it true that $x^2 + axy + y^2 > 0$ whenever $x$ and $y$ are not both $0$?
$(x + \frac{ay}{2})^2 + (\frac{\pm\sqrt{-((ay)^2 - 4y^2)}}{2})^2 > 0$ for $(ay)^2 - 4... | 5 | [
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0.... | 15,946 | 15946 | |
Direction of friction when rolling without slipping
Referos
So how exactly do you predict the direction of friction when rolling without slipping?
The friction is in the direction that corresponds to angular acceleration or deceleration, absent any other sources of torque. In the case of an angled ramp, it's always... | 4 | [
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... | 15,947 | 15947 | |
Patent US4620287 - Method and apparatus for representation of a curve of uniform width
TECHNICAL FIELD
The present invention relates generally to the field of computer aided graphic arts. More specifically the invention relates to a method and apparatus for representation of and recreation of lines or
curves having a ... | 4 | [
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-0.06... | 15,948 | 15948 | |
coterminal
October 14th 2007, 09:49 PM #1
Newbie
Joined
Sep 2007
Posts
17
coterminal
Express tan 245° as a function of an angle in Quadrant I.
Honestly I'm not even sure how I could express a value as a function... must've slept through this one?
Help appreciated!
The "function" here is tr... | 4 | [
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0.0089... | 15,949 | 15949 | |
O-Matrix Application Samples
AR1SIM.OMS
Script File:
# Description:
# Simulates an AR(1) process and estimates its spectrum.
#
# An AR(1) process satisfies the recursive formula
# x(i) = a * x(i - 1) + w(i)
# where w(n) is white noise. We compare the function's true spectrum
# to a spectral estimator. Referenc... | 4 | [
-0.058837890625,
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0.005889892578125,
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-0.08544921875,
-0.02197265625,
0.0498046875,
0.087890625,
-0.0708007... | 15,950 | 15950 | |
Patent US5083072 - Position control means and method for servo motor
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to position control means and a method to control the speed pattern of servo motors by exponential deceleration and acceleration. Particularly, even if the speed pattern of ... | 4 | [
-0.10888671875,
0.047119140625,
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0.0106201171875,
0.010... | 15,951 | 15951 | |
Proofs involving logs
Can anyone show the following?: $\int$log(x)dx = xlog(x) - x
Hello, Mathman87! Can anyone show the following?: . . $\int \ln x \,dx \;=\; x\ln x - x + C$ Integrate by parts . . . . . $\begin{array}{ccccccc}u &=& \ln x && dv &=& dx \\ du &=& \frac{dx}{x} && v &
=& x \end{array}$ We have: . $x\ln x... | 5 | [
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0.0096435546875,
-0.02001953125,
-0.033203125,... | 15,952 | 15952 | |
Simple Rearanging to solve for x
April 22nd 2009, 06:08 PM #1
Newbie
Joined
Apr 2009
Posts
11
Simple Rearanging to solve for x
Okay so I have to solve for x
$120 = 2(x-2)(x-3)(x+5)<br />$
$60 = (x-2)(x-3)(x+5)$
$60 = x^3 - 19x + 30$
I am stuck from here. I don't know if I should have e... | 4 | [
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-0.08642578125,
0.05395... | 15,953 | 15953 | |
3D DC Resistivity Inversion with Topography Based on Regularized Conjugate Gradient Method
International Journal of Geophysics
Volume 2013 (2013), Article ID 931876, 9 pages
http://dx.doi.org/10.1155/2013/931876
Research Article
3D DC Resistivity Inversion with Topography Based on Regularized Conjugate Gradient Metho... | 4 | [
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0... | 15,954 | 15954 | |
Calculate the generalized integral
1. December 15th 2009, 11:13 AM #1
2. December 15th 2009, 11:33 AM #2
Sorry to say but you're not even close to correct, and if you wrote the above then I think you need to go back to your general basics on integration:
$\int\frac{x^2-1}{x^4}dx=\int\left(\frac{... | 5 | [
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-0.11... | 15,955 | 15955 | |
Completeness Axiom
November 7th 2009, 03:12 AM #1
Member
Joined
Feb 2008
Posts
184
Completeness Axiom
A= $\left\{ {x\in \mathbb{R}:x^3 < 2} \right\}$
Prove carefully that A has a least upper bound.
A is non-empty and bounded above therefore by the completeness axiom the supremum of A exists. Ca... | 4 | [
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A hard probability problem
December 27th 2011, 08:16 PM
FRMST
A hard probability problem
I'm stuck at this impossible problem... i'd aprecciate if you help me (Headbang)
A box contains n socks, such that:
- $b$ are white
- $r$ are red
- $a$ are blue
(So, $n = b + r + a$)
Consider an ex... | 4 | [
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... | 15,957 | 15957 | |
Complex numbers: express in modulus-argument form (cis)
February 15th 2011, 08:51 PM
kumquat
Complex numbers: express in modulus-argument form (cis)
1 + cot(x)i , express in modulus argument form where 0 < x < pi/2
I understand how to get the modulus by finding (1 + cot^2(x))^1/2 = cosec(x)
but the ans... | 4 | [
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... | 15,958 | 15958 | |
Least squares fitting
April 18th 2009, 04:29 AM #1
Least squares fitting
Hi
Having some problems with setting this one up.
According to Keplerīs first law, a comet should have an elliptic, parabolic or hyperbolic orbit(with gravitational attractions from planets ignored). In suitable polar coordinates, ... | 5 | [
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Binomial theorem question check
May 19th 2010, 12:15 AM
jvignacio
Binomial theorem question check
hey guys, just need to check if my working out and solution is correct.
Find the coefficient of $x^6$ in the expansion $(x + 3)^8$
My solution
So: $\sum_{i=0}^{8}$$\binom{8}{8-i}$$(x)^{8-i}$$(3)^i$
... | 4 | [
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0... | 15,960 | 15960 | |
Critical Thinking System of 3 Equations Problem
September 27th 2011, 09:26 PM
petey615
Critical Thinking System of 3 Equations Problem
Abe gives Rafer as many raffle tickets as Rafer already had and Jorge as many as Jorge already had. Then Rafer gives Abe and Jorge as many tickets as each of them has. Similarly,... | 4 | [
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Patent US7525302 - Method of estimating channel bandwidth from a time domain reflectometer (TDR) measurement using rise time and maximum slope
BACKGROUND
1. Technical Field
The present invention relates in general to a method of measuring the bandwidth of a signal channel that carries an electrical signal. More parti... | 4 | [
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Patent US7142668 - Apparatus and method for generating expression data for finite field operation
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a data generating apparatus for automatically setting the expression data of a finite field when a finite field operation of codes, c... | 4 | [
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0.00595092773... | 15,963 | 15963 | |
Variation in Time of Sunrise
Next: Introduction to Detailed Calculation
Variation in Time of Sunrise
T.L.Watts
... | 4 | [
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Graph transformations...
March 31st 2008, 09:24 PM #1
Member
Joined
Jan 2008
Posts
132
Graph transformations...
Hello! I am a little confused about graph transformations and I have some questions that I don't really know how to solve...Please help! Thank you!
1)
The transformations A,B and C are... | 4 | [
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Tetrahedron
January 5th 2010, 05:16 PM
Vicky1997
Tetrahedron
A tetrahedron with four equilateral triangular faces has a sphere inscribed within it and a sphere circumscribed about it. For each of the four faces, there is a sphere tangent externally to the
face at its center and to the circumscribed sphere. A... | 5 | [
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[OT] Statistics question.
BrowserUk has asked for the wisdom of the Perl Monks concerning the following question:
I'm testing a piece of perl code (tenuous justifiction :)) that has billions of possibilities and thus is impractical to test exhaustively.
Therefore I want o test statistically, and to that end my questi... | 5 | [
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... | 15,967 | 15967 | |
Coin toss probability question
April 4th 2012, 11:12 AM #1
Coin toss probability question
Al tosses one quarter and at the same time Betty tosses two quarters. What is the probability that Betty gets the same number of heads as Al?
This is what I have:
Al H/T ½ 50%
Betty HH / HT / TH/ TT ½ 50%
Th... | 4 | [
0.040283203125,
0.0322265625,
0.0021209716796875,
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0.0206298828125,
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0.00063323974609375,
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0.048828125,
0.0049133... | 15,968 | 15968 | |
Numerical Solution of Uncertain Beam Equations Using Double Parametric Form of Fuzzy Numbers
Applied Computational Intelligence and Soft Computing
Volume 2013 (2013), Article ID 764871, 8 pages
http://dx.doi.org/10.1155/2013/764871
Research Article
Numerical Solution of Uncertain Beam Equations Using Double Parametri... | 5 | [
-0.04736328125,
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-0.0... | 15,969 | 15969 | |
16 horses can haul a load of lumber in 24 minutes. 12 horses
Author Message
TAGS:
16 horses can haul a load of lumber in 24 minutes. 12 horses [#permalink] 22 Feb 2013, 01:27
... | 4 | [
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... | 15,970 | 15970 | |
Patent US7116327 - Methods for generating control points for cubic bezier curves
BACKGROUND OF THE INVENTION
Modern operating systems use cubic Bézier curves extensively to represent many user interface components. For example, the individual glyphs of a font are typically represented as a sequence of cubic
Bézier cur... | 4 | [
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-0.02551269531... | 15,971 | 15971 | |
Factoring Perfect Squares
September 1st 2011, 07:02 AM
ArcherSam
Factoring Perfect Squares
Hey!
I need help factoring this polynomial. I can see the perfect square but I am unable to get the correct answer when factoring this polynomial:
$<br /> \[\begin{array}{l}<br /> (x{}^6 - 2x{}^3 + 1)\\<br /> \\<... | 4 | [
-0.01385498046875,
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0.040283203125,
-0.09033203125,
-0.0... | 15,972 | 15972 | |
Proof regarding power sets?
May 9th 2013, 02:03 PM #1
Newbie
Joined
Jan 2013
From
Jupiter
Posts
20
Proof regarding power sets?
Let A and B be sets. Prove that A ~ B implies that P(A) ~ P(B), where P(A): power set of A and P(B): power set of B.
I'm not sure how to approach this problem. My though... | 4 | [
0.0027008056640625,
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0.046875,
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0.068359375,
0.059326171875,
-0.00823974609375,
-0.018432... | 15,973 | 15973 | |
Show function satisties C-R relations, but is not analytic
February 6th 2010, 04:50 PM
platinumpimp68plus1
Show function satisties C-R relations, but is not analytic
Regarding the complex function f(z)=sqrt(|xy|), where z=x+iy, and its behavior at the origin.
I'm really confused - how can this possibly sati... | 5 | [
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... | 15,974 | 15974 | |
Analysis of the Error in a Numerical Method Used to Solve Nonlinear Mixed Fredholm-Volterra-Hammerstein Integral Equations
Journal of Function Spaces and Applications
Volume 2012 (2012), Article ID 242870, 12 pages
http://dx.doi.org/10.1155/2012/242870
Research Article
Analysis of the Error in a Numerical Method Used... | 5 | [
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0.03173828125,
-0.079... | 15,975 | 15975 | |
coordinate geomatry
Determine the ratio in which the line 3X+Y-9=0 divides the line segment joining the points(1,3) and (2,7)
Hello, nitinnitin2! Determine the ratio in which the line $3x+y-9\:=\:0$ divides the line segment joining the points: $A(1,3)\text{ and }B(2,7).$ The line through $A$ and $B$ has slope: . $m \:... | 4 | [
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-0.0089721679... | 15,976 | 15976 | |
Math Help
January 14th 2011, 10:05 AM #1
Member
Joined
Nov 2010
Posts
94
I have difficulties in solving problems
1) Show that lim (1 + (1/2n))^n = sqrt e.
n-> oo
2)find lim (1+2/n)^n
n-> oo
3) lim (1 + 3/n) ^n
n-> oo
4) suppose 0 < Sn and Sn+1 < rSn, where r is a constant ... | 5 | [
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-0.0167236328125,
0.0184... | 15,977 | 15977 | |
Finding a point position on a shape after the shape was rotated
August 15th 2011, 02:17 PM #1
Newbie
Joined
Aug 2011
Posts
1
Finding a point position on a shape after the shape was rotated
Hi. First I'd like to let you know that I'm probably in the wrong section, but this is because I really, honestly, d... | 4 | [
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0.0177001953125,
-0.0390625,
-0.029296875,
... | 15,978 | 15978 | |
Fluid Pressure problem.
December 6th 2009, 04:03 PM #1
Newbie
Joined
Nov 2009
Posts
4
Fluid Pressure problem.
Hey all,
I have this problem and I cannot for the life of me figure out what I'm doing wrong that the homework isn't accepting my answer. Can someone take a look at what I'm doing and maybe... | 4 | [
-0.031005859375,
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0.09375,
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-0.06005859375,
... | 15,979 | 15979 | |
Similarity Problem
August 8th 2009, 08:39 AM #1
Member
Joined
May 2008
Posts
101
Similarity Problem
Hi, in this problem, I'm not sure what the diagram looks like for a start, also I'm not sure how to solve it. I think congruency/similarity is involved.
Let XYZ be a triangle with a right angle at Z. ... | 4 | [
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0.0064697265625,
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... | 15,980 | 15980 | |
Patente US6788708 - Code synchronization unit and method
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of U.S. patent application Ser. No. 08/869,728 filed Jun. 5, 1997, which is incorporated herein by reference.
FIELD OF THE INVENTION
The present invention relates to digital communicati... | 4 | [
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0.05078125,
0.00738525390625,
... | 15,981 | 15981 | |
Show that m is an even number, then f is an even function.
October 1st 2012, 05:40 PM
Eraser147
Show that m is an even number, then f is an even function.
My question is how can I show this? My problem states: Suppose m is an integer and f is the function defined by f(x) = x^m.
Show that if m is an even num... | 4 | [
-0.00127410888671875,
0.035888671875,
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0.038330078125,
-0.03515625,
... | 15,982 | 15982 | |
More Matrix Algebra
August 28th 2009, 11:24 PM
juliak
More Matrix Algebra
Given that
M =
1 2
-1 3
find the value(s) of p and q given that M^2 + pM + qI = 0
This is what I did:
M^2 =
-1 8
-4 7
Therefore
p ( 1 2 ) + q ( 1 0 )
...(-1 3 ) .....( 0 1)
=
1 ... | 4 | [
-0.01531982421875,
0.06005859375,
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0.07275390625,
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Geometric Series
April 5th 2007, 05:37 PM #1
Junior Member
Joined
Feb 2007
Posts
33
Geometric Series
Determine whether or not the indicated geometric series converges. If so, find the value to which it converges.
t1 = 81 and t5 = 1 (Two answers)
Hello, Trentt!
Determine if this geometric s... | 4 | [
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Absolute Magnitude of Lightbulb
First, The Greek Astronomer Hiparchos divided the stars we see on the sky in 6 magnitudes.The brightest were of first magnitude ,the next fainter stars were second and the stars just visible with
naked eye were 6th magnitude.
British astronomer Pogson(1854) ,taking into account the law o... | 4 | [
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Just how competent are your players?
April 1, 2012 Posted by Matthew J. Neagley
Like Most GMs, you probably find your self wondering from time to time just how competent your players are. Are they the well oiled, expertly min-maxed team they claim to be, or are they a bunch of
bumbling monkeys? Luckily there’s a sim... | 4 | [
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... | 15,986 | 15986 | |
U(n) as subgroup of O(2n)
Hello timb00. This folllows from the natural identification of C with Rē that sends a+ib to (a,b). First extend this to an isomorphism (of real vector spaces) btw C^n with R^2n. Then through
conjugation by this iso, endomorphisms of C^n can be identified with endomorphisms of R^2n.* This defin... | 4 | [
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Numerical and Analytical Study for Fourth-Order Integro-Differential Equations Using a Pseudospectral Method
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 434753, 7 pages
http://dx.doi.org/10.1155/2013/434753
Research Article
Numerical and Analytical Study for Fourth-Order Integro-Differential E... | 5 | [
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Patent US20040210120 - analytical device for blood analysis of glucose, triglycerol, cholesterol or oxyhemoglobin
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The invention of the present application is a continuation in part of U.S. patent application Ser. No. 09/766,237, filed on Jan. 199, 2001.
[0002] The corres... | 4 | [
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Simple partial fractions help (warning complex analysis :P )
1. The problem statement, all variables and given/known data
the question can be ignored - it involves laplace and Z transforms of RLC ckts.
Vc(s) = 0.2
-----------------
s^2 + 0.2s + 1
find the partial fraction equivalent ... | 4 | [
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0.0400390625,
... | 15,990 | 15990 | |
Question 12
December 25th 2006, 11:31 PM
CaptainBlack
Question 12
Water leaves a tap (faucet) in a steady stream at a speed of 20 cm/s
which is 1 cm wide.
How wide is the stream 30 cm below the tap (assuming that the stream
does not break up due to surface tension induced instability).
RonL
De... | 5 | [
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Newton's law of cooling/warming
September 22nd 2009, 10:28 AM #1
Junior Member
Joined
Apr 2009
Posts
33
Newton's law of cooling/warming
A thermometer reading 4˚C is brought into a room where the temperature reading is 30˚C. If the thermometer reads 10˚C after 2 minutes, determine the temperature reading ... | 5 | [
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... | 15,992 | 15992 | |
Point on the graph minimize problem
April 16th 2009, 01:07 AM #1
Newbie
Joined
Apr 2009
Posts
9
Point on the graph minimize problem
Consider the function below.
Find the point on the graph of function that is closest to the point (-3, 12).
( , 2)
I know you have to use the distance formula a... | 5 | [
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Wave function in SHM
y(x,t)=Asin(ωt+kx) is the equation of motion for a simple harmonic oscillator.
You get this by solving Newton's force law..
[itex] F=ma=-kx \\
ma+kx=0 \\
a+\frac{k}{m}x=0 [/itex]
Or you can write
[itex] \ddot{x}+\frac{k}{m}x=0 [/itex]
This is a differential equation, solved by Asin(ωt+kx), wher... | 4 | [
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Force vs work
BitWiz
I'm still having trouble with this:
Generically, work = m * d^2 / t ^2 (mass, displacement, time)
I think you are simply saying that "work" (energy) has units of "mass time distance squared over time squared" as in one Joule being one kg m squared per seconds squared. If that is what you are
s... | 4 | [
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Solve the differential equation?
Solve the differential equation? f"(x)=x^2 , f'(0)=6, f(0)=3 Please help
Consider the rule $\int x^n ~dx = \frac{x^{n+1}}{n+1}+C$ so $f'(x) = \int x^2 ~dx = \frac{x^3}{3}+C$ now you must solve for C using $f'(0)=6$ $f'(x) = \frac{x^3}{3}+C$ $6 = \frac{0^3}{3}+C$ now $C=6$
and $f'(x) = ... | 5 | [
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Thought - Math Genius
Answer :
A little thought will make it clear that the answer must be fractional, and that in one case the numerator will be greater and in the other case less than the denominator.
As a matter of fact, the height of the larger cube must be ^8/[7] ft., and of the smaller ^3/[7] ft., if we are to h... | 4 | [
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0.0037689208984375... | 15,997 | 15997 | |
Math Help
September 22nd 2009, 05:31 AM #1
Junior Member
Joined
Aug 2009
Posts
25
r(t) = cos^3 t + sin^3 t
How do you find r'(t)? Would it be -3sin^2 t + 3 cos^2 t or something else?
You need to use the chain rule.
$\frac{d}{dt}(\cos^3{t}) = -3\sin{t}\cos^2{t}$
$\frac{d}{dt}(\sin^3{t}... | 5 | [
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If r, q are rationals, and r+q, r*q are integers, are r, q both integers?
October 14th 2007, 12:55 PM #1
Junior Member
Joined
Oct 2007
From
Bath, UK
Posts
25
If r, q are rationals, and r+q, r*q are integers, are r, q both integers?
Well, the title pretty much says it all. If: $r, q e Q, r+q, r*q e Z$... | 4 | [
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