content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
The
The Definition of the Derivative
As you saw in the last section, the derivative of a function measures the function's rate of change, or its slope. To give you a better idea of what a derivative is, imagine that Bob The Crash Test
Dummy is driving a car. Bob's car is on fire, which is why his driving is somewhat ... | 5 | [
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counting rule?
August 5th 2010, 11:18 AM
sfspitfire23
counting rule?
There are 3 hangers and 5 shirts in a room. In how many ways, can these 5 shirts be arranged among the three hangers?
Would we solve this with the counting rule where we take 5(3)=15?
August 5th 2010, 11:21 AM
yeKciM
there's 10 co... | 4 | [
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integral equation by Laplace transforms and contour integration
November 6th 2011, 06:12 PM
wik_chick88
integral equation by Laplace transforms and contour integration
i have to solve $\int^t_0 f(\tau)sin(t - \tau) d\tau = \cos t - \cos 3t$ by using Laplace transforms and then inverting it using contour integrat... | 4 | [
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0... | 21,202 | 21202 | |
Parabola question.... exam ..plz help asap..
January 20th 2008, 04:29 PM #1
Newbie
Joined
Sep 2007
Posts
18
Parabola question.... exam ..plz help asap..
Write an equation of a quadratic functon that satisfies each set of condtions.
a) the function has a minimum value of 6 at x=4.
b) The parabo... | 4 | [
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Linearization problems... very confused:(
January 6th 2011, 07:50 AM #1
Member
Joined
Jul 2010
Posts
109
Here are some problems I have in a review test tomorrow.
Which of the following is an equation of the line tangent to the graph of f(x) = x^6 - x^4 at the point where f'(x) = -1
Consider the ... | 4 | [
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Indefinite Integral
The best we can do is to let $u = \sqrt{x} \implies 2u~du = dx$, so $\int \frac{sin(\sqrt{x})}{x}~dx = \int \frac{sin(u)}{u^2} \cdot 2u~du = 2 \int \frac{sin(u)}{u}~du$ This integral (at least)
sometimes goes by the name of "Si." (So as a function of x it is $Si(x)$.) There is no closed-form solutio... | 4 | [
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... | 21,205 | 21205 | |
obtaining global minimum
January 25th 2011, 10:08 PM
Sambit
obtaining global minimum
Consider the function of 2 variables $F(x,y)=21x-12x^2-2y^2+x^3+xy^2$
Find the points of local minimum.
And show that F has no global minimum.
For the 1st part, I have obtained x=2, and correspondingly the value of ... | 4 | [
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T-score vs. Z-score
December 6th 2009, 11:33 PM
hello_math_
T-score vs. Z-score
Random variables (RVs) ‘X’ and ‘Y’ represent annual incomes of well established unmarried young professional men and women. These two RVs are normally distributed and are statistically
independent. The mean values of ‘X’ and ‘Y’ ... | 4 | [
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Slightly complicated L'Hospital's rule problem
November 29th 2010, 01:07 PM #1
Newbie
Joined
Nov 2010
Posts
5
Slightly complicated L'Hospital's rule problem
Hi, I've been working on these problems for hours and have failed every time, so I assume there's something fundamental I'm getting wrong either in ... | 5 | [
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Unit vectors in Spherical Coordinates
Ok, this is fairly trivial.
Assume that some vector [itex]\vec{u}[/itex] (dependent on some independent variables) has unit size irrespective of the values of the independent variables, i.e:
[tex]\vec{u}^{2}=1(1)[/tex]
Then, labeling an independent variable as [itex]x_{i}[/itex]... | 4 | [
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Two Fourier transforms and the calculation of Effective Hamiltonian.
Hi, The following contains two questions that I encountered in the books of Claude Cohen-Tannoudji, "Atom-Photon Interactions" and "Atoms and Photons: Introduction to Quantum Electrodynamics". The
first one is about how to calculate two Fourier transf... | 4 | [
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SPR Distance Computation for
• We are sorry, but NCBI web applications do not support your browser and may not function properly.
More information
•
Evol Bioinform Online. 2008; 4: 17–27.
Published online Feb 9, 2008.
SPR Distance Computation for Unrooted Trees
Abstract
The subtree prune and regraft dis... | 4 | [
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Finding the Moment Generating Function of the Geometric Distribution
August 7th 2009, 02:48 PM #1
Member
Joined
Nov 2008
Posts
121
Finding the Moment Generating Function of the Geometric Distribution
Hi
Not too sure if this is the correct area, but hopefully someone can help!
I've got a problem t... | 4 | [
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Putting the equation of a conic into standard form
February 24th 2011, 10:27 AM #1
Junior Member
Joined
Sep 2010
Posts
64
Putting the equation of a conic into standard form
Hi, I have the following exercise...
By completing the square in $x$ and $y$, and so by eliminating the linear terms, put the c... | 4 | [
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logarithmic differentiation
February 20th 2009, 01:02 AM #1
Newbie
Joined
Feb 2009
Posts
17
logarithmic differentiation
i'm so sorry for keep asking questions but im really confused for this one.
the problem is y=(e^(x-1)*sin^2*x)/(((x^2)+5)^2x)
the trig function (sin^2 + 5), i don't know how to... | 5 | [
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Multivariable Calculus and Encryption Challenge
Challenge:
Part 1
f(x,y) = (x^2)*(2^y)
Determine the magnitude of the gradient vector of the given function f(x,y) at the point P where x=1337 and y=8.
Symbol Notation:|grad(f(1337,8))|
Truncate (floor) the decimal point once you have found the magnitude of the gradient v... | 5 | [
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Series/Sequence
April 22nd 2008, 06:08 PM
ch2kb0x
Series/Sequence
An = 3n / (12n+15)
Series n=1 infinity (An) (Sorry,i dont know the symbols)
Does this converge or diverge? if it diverges does it go to infinity or minus infinity? If it converges what would be the limit?
Sequence {An}
Same quest... | 5 | [
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0.0... | 21,216 | 21216 | |
Another DE initial value problem
March 17th 2009, 09:30 AM #1
Newbie
Joined
Mar 2009
Posts
4
Another DE initial value problem
Suppose that y=y(x) is a solution of the initial value problem
y' + e^x y = x^2, y(0) = 4
Find y'(0) , y''(0)
So how am I suppose to do the question? I started by doi... | 5 | [
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Pointwise Convergence vs. Uniform Convergence
October 28th 2007, 11:37 AM
tbyou87
Pointwise Convergence vs. Uniform Convergence
Hi,
Let fn(x)=(x-(1/n))^2 for x ele [0,1].
1) Show that the sequence of functions {fn} converges to some function pointwise on [0,1] and write the limit function.
2) Does {f... | 5 | [
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Partial Derivatives
March 24th 2009, 08:46 AM #1
Junior Member
Joined
Jan 2008
Posts
50
Partial Derivatives
Got another question, this time its a bit harder and im not sure how to get the partial derivatives
The function is:
f(x,y) = e^1/2xy
e to the power of one half(x times y)
Need he... | 5 | [
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Physics Forums - View Single Post - No-Interaction Theorem
aspidistra,
I think I understand the origin of your confusion. In order to clear things up I would suggest you to consider "instantaneous" observers, which exist and make their measurements only during very
short time intervals.
To make it more clear, let m... | 4 | [
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Integrating out of the real domain of a function
piercebeatz
OK, but what did you do to transform the integral into that form?
First, you need to assume a specific path, P (though for the ln() function it won't matter as long as we don't go around the origin to get there). Assume it's along the negative real axis. ... | 5 | [
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Application of Local Fractional Series Expansion Method to Solve Klein-Gordon Equations on Cantor Sets
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 372741, 6 pages
http://dx.doi.org/10.1155/2014/372741
Research Article
Application of Local Fractional Series Expansion Method to Solve Klein-Gordon Equat... | 5 | [
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0.0277099... | 21,222 | 21222 | |
Modular Arithmetic
September 19th 2012, 07:29 AM #1
Newbie
Joined
Sep 2012
From
USA
Posts
2
Modular Arithmetic
I need help with the following problem:
Describe the solution set for the following linear congruence:
140x = 133 (mod 301) (That should be the congruence symbol, not equal symbol,... | 5 | [
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Patent US7315277 - Bit depth reduction for analog to digital conversion in global positioning system
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of U.S. Provisional Application No. 60/376,724, filed Apr. 30, 2002, the contents of which are incorporated herein by reference.
STATEMENT OF... | 4 | [
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Minimum-Energy Bivariate Wavelet Frame with Arbitrary Dilation Matrix
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 896050, 10 pages
http://dx.doi.org/10.1155/2013/896050
Research Article
Minimum-Energy Bivariate Wavelet Frame with Arbitrary Dilation Matrix
School of Mathematics and Information Scien... | 4 | [
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0.0498... | 21,225 | 21225 | |
Length of Shorter Diagonal
September 7th 2009, 05:55 AM #1
Banned
Joined
Aug 2009
From
USA
Posts
126
Length of Shorter Diagonal
The lengths of two adjacent sides of a parallelogram are 6 and 15. If the degree measure of the included angle is 60, what is the length of the shorter diagonal of the paral... | 4 | [
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check my work w/ this word problem
December 16th 2009, 02:57 PM #1
Junior Member
Joined
May 2009
Posts
36
check my work w/ this word problem
ok so i'm not sure if my answers are right
An open box is to be formed by cutting four identical squares from the coners of a sheet of metal 20cm by 20cm, and ... | 4 | [
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-0.0693359375,
0.0076599... | 21,227 | 21227 | |
search results
Expand all Collapse all Results 1 - 2 of 2
1. CMB 2007 (vol 50 pp. 11)
van der Pol Expansions of L-Series
We provide concise series representations for various L-series integrals. Different techniques are needed below and above the abscissa of absolute convergence of the underlying L-series.
... | 4 | [
-0.061279296875,
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0.015625,
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Evaluate a Limit
$\lim_{k \rightarrow \infty } \ \ln ( \frac{1}{2k+1} )^{ \frac{1}{2k+1} }$$= \lim_{k \rightarrow \infty } \ (-\ln ( 2k+1 ))^{ \frac{1}{2k+1} }$$= -\lim_{k \rightarrow \infty } \ (\ln ( 2k+1 ))^{
\frac{1}{2k+1} }$$= -\lim_{x \rightarrow \infty } \ (\ln ( x ))^{ \frac{1}{x} }$$= -\lim_{x \rightar... | 5 | [
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... | 21,229 | 21229 | |
different answers for derivative?
March 1st 2013, 05:24 AM #1
Newbie
Joined
Mar 2013
From
Some where
Posts
2
Take this trigonometric function:
$\frac{d \(sin{(\cos{\theta})})^2}{d \theta}}$
Using the chain rule i think it becomes:
$-2\theta\sin{(\cos{\theta})}\sin{\theta}$
But if w... | 5 | [
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... | 21,230 | 21230 | |
Contrapositive proof of irrational relations
FelixHelix
I'm confused with a question and wondered if anyone could help explain where I need to go...
let x ε R. Prove that x is irrational thenI'm confused with a question and wondered if anyone could help explain where I need to go...
let x ε R. Prove that x is irra... | 4 | [
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0.068... | 21,231 | 21231 | |
Patent US5260865 - Computer control system
This invention relates to controlling the operation of a distillation column. In one aspect, it relates to a method and an apparatus for applying multivariable noninteracting control to a
distillation column. In another aspect, it relates to a computerized nonlinear model for ... | 4 | [
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... | 21,232 | 21232 | |
epsilon delta continuity applied to polynomial
July 22nd 2009, 03:53 AM #1
Newbie
Joined
Jul 2009
Posts
4
epsilon delta continuity applied to polynomial
Hi, I've been asked to prove that f(x) = x^3 - 9x +2 is continous at x=3 by using epsilon delta continuity. I assume I'm not allowed to use the theorem ... | 4 | [
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-0.01068115... | 21,233 | 21233 | |
Limits of Integration
December 10th 2010, 10:36 AM #1
Newbie
Joined
Dec 2010
Posts
18
Limits of Integration
Can I get some help, im trying to view the image of this in space
r is the region in the first quadrant bounded by the line y=x and
the curve x^4 +x^2y^2=y^2..
any idea on the limits f... | 5 | [
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-0.1279296875,
... | 21,234 | 21234 | |
discrete problem, counting with functions
November 12th 2012, 10:16 AM #1
Junior Member
Joined
Jun 2010
Posts
35
discrete problem, counting with functions
So I have this problem to prove, and I can only satisfy it the first way, I can not bring it back the other way.
1. Find a one-to-one corresponde... | 4 | [
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Question about Geometric Series and Roots of Unity
July 10th 2013, 04:33 AM
Qwob
Question about Geometric Series and Roots of Unity
Hello. I am working on my own through the AQA FP2 Mathematics textbook (A2-Level) and I have come across a question I am stuck on. I am given the following equation, where $z$ is a ... | 5 | [
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inverse functions
April 27th 2009, 06:20 AM #1
Newbie
Joined
Apr 2009
Posts
10
inverse functions
Ok need to find the inverse and i need to show that
f ^(-1) o f= x= f o f^(-1)
p(x) =
x
-----
x - 1
i did
y=
x
---
y -1 = (y-1) x = y then xy -1x = y -xy
then
... | 4 | [
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... | 21,237 | 21237 | |
Just one More :)
April 30th 2007, 12:02 PM #1
Junior Member
Joined
Mar 2007
Posts
32
Ok..maybe not one more but three
I'm supposed to find all solution of the equation in the inverval [0, 2pi).
1. sin2x = - sqrt(3)/2.
I tried solving this one. I have something like this: 2pi/3 + npi and 5pi... | 4 | [
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Trigonometry surds
June 7th 2010, 03:37 AM #1
Trigonometry surds
If $sinA=\frac{2}{\sqrt{5}}$ and $tanB=\frac{1}{2}$, how can I prove that $A-B=45$?
Using a calculator to find inverse sine and tangent then subtracting the angles gets 45 degrees, but I do not think that is the correct way to approach the ques... | 4 | [
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closest point
February 12th 2008, 02:25 PM
chaddy
closest point
I need to find the point in the plane x + 2y + 3z = 6 that is nearest the origin.
February 12th 2008, 02:32 PM
ecMathGeek
February 12th 2008, 02:34 PM
chaddy
How would I find the normal vector?
February 14th 2008, 07:34 PM
chaddy
Does... | 5 | [
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Equivalent Metrics
September 18th 2010, 01:01 AM
bram kierkels
Equivalent Metrics
Define $\rho$ on $X \times X$ by
$\rho(x,y) = min(1,d(x,y)), \ \ \ \ \ \ \ \ \ \ x,y \in X$
Show that $\rho$ is a metric that is equivalent to d
My solution:
Two metrics are equivalent if and only if the converge... | 5 | [
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by using ML- inequality
August 5th 2009, 12:32 AM #1
Member
Joined
Aug 2008
Posts
172
by using ML- inequality
prove that :
$\mid \int \frac{1}{{z^4}} dz \mid \leq 4 \sqrt 2$ on c where C: the line segment from z=i to z=1
$\Big|\int_{C} \frac{1}{z^{4}} \ dz\Big| \le ML$
where M is an upper b... | 5 | [
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Wolfram Demonstrations Project
The Reve's Puzzle
This is the classic Reve's puzzle as presented in [1]. Initially, the Reve placed eight pieces of cheese of graduating sizes on one of four stools. The Reve challenged his fellow pilgrims to move
them all to another stool by moving them one at a time, without ever putti... | 4 | [
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rational number representation
May 4th 2008, 06:22 PM #1
Newbie
Joined
Feb 2008
Posts
6
rational number representation
I have a question that I can't recall how to do. Here it is.
Determine and state the rational number representation for the following decimal. Put the rational number in lowest term... | 4 | [
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Patent US7836385 - Meta-Viterbi algorithm for use in communication systems
CROSS-REFERENCE TO RELATED APPLICATIONS/INCORPORATION BY REFERENCE
This application is a continuation of U.S. patent application Ser. No. 11/049,769, filed on Feb. 3, 2005 now U.S. Pat. No. 7,490,284.
FEDERALLY SPONSORED RESEARCH OR DEVELOPMEN... | 4 | [
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Patent US8104339 - Systems and methods for determining air data parameters
PRIORITY CLAIM
This patent application claims priority from copending U.S. Provisional Patent Application Ser. No. 61/030,393 filed Feb. 21, 2008, and entitled, Systems and methods for Determining Air Data
Parameters, the contents of which ar... | 4 | [
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Tangent line, math wrong somewhere
I have an equation $f(x) = \frac{5x}{(3-5x)^5}$ and I want the equation of the tangent line at x = 2. I know what to do, but my math is wrong somewhere down the line.
Subbing in 2 $f(2) = \frac{5(2)}{(3-5(2))^5} = -0.000595$
Taking derivative $f'(x) = \frac {100x+15}{(3-... | 4 | [
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-0.032958... | 21,247 | 21247 | |
The Frisch–Waugh–Lovell Theorem for Both OLS and 2SLS
The Frisch–Waugh–Lovell (FWL) theorem is of great practical importance for econometrics. FWL establishes that it is possible to re-specify a linear regression model in terms of orthogonal
complements. In other words, it permits econometricians to partial out right-... | 5 | [
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... | 21,248 | 21248 | |
Velocity, Integrals, and Riemann Sums
May 31st 2008, 07:34 AM #1
Newbie
Joined
May 2008
Posts
5
Velocity, Integrals, and Riemann Sums
Table given:
Rocket A has positive velocity v(t) after being launched upward from an initial height of 0 feet at time $t=0$ seconds. The velocity of the rocket is re... | 4 | [
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Math Help
December 12th 2007, 03:04 AM #1
Member
Joined
Dec 2007
Posts
80
help please
How can i simplify the following? help please
16 1/2
-------
81 3/4 do i need to add the fractions then divide or flip..
also
12(a^3b^2c)^4
-----------------
4a^2c^6
thank you
$... | 4 | [
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CMS/CSHPM Summer 2005 Meeting
We consider the Burgers-type equation
in R^n with L^¥ (not necessary potential) initial vector field. We show that there is a unique global smooth solution, satisfying the initial condition in a weak sense.
We consider the Hamiltonian coupled-mode system derived in nonlinear ... | 4 | [
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Existence Results for Second-Order Impulsive Neutral Functional Differential Equations with Nonlocal Conditions
Discrete Dynamics in Nature and Society
Volume 2009 (2009), Article ID 641368, 11 pages
http://dx.doi.org/10.1155/2009/641368
Research Article
Existence Results for Second-Order Impulsive Neutral Functional... | 5 | [
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Finding the biggest sum in a set
September 19th 2012, 05:45 AM #1
Newbie
Joined
Sep 2012
From
Türkiye
Posts
5
Finding the biggest sum in a set
Hi, I'm trying to create an algorithm, and I'm stuck at one point. Say I have a set of N items, all have their points, and ordered by their ranks.
For exa... | 5 | [
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Go4Expert - View Single Post - Length of Pole | 29 Sep 2009
48ft is correct
Solution:
Fraction of pole in the ground = 1/2
Fraction of pole covered by water = 1/3
Fraction of pole in the ground and covered by water = 1/2 + 1/3 = (3 + 2)/6 = 5/6
Fraction of pole out of water = 1 - 5/6 = 1/6
Thus, one-sixth of the pol... | 4 | [
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Pharmaceutical Calculations
Submitted by w on Mon, 10/27/2008 - 18:16
Smt. Dr. Jayanti Vijaya Ratna
Isotonicity
There are four methods of adjusting isotonicity. For preparations meant for use as intra
venous injections or for use in the eye or nasal tract or ear the liquid must
be isotonic with the body fluids. Thi... | 4 | [
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Graphing using calculus
October 7th 2011, 11:04 PM #1
Member
Joined
Jan 2008
Posts
130
Graphing using calculus
Hey all, could someone please check my answers? thanks
1.) Consider the function k(x) = (x^2+1)arctan(x)
Useful Information:
k'(x) = 1+2xarctan(x)
k''(x) = (2x/x^2+1)+ 2arctan(... | 5 | [
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Physics Forums - 50 coin tosses, probability of 25 heads vs 3 heads
Re: 50 coin tosses, probability of 25 heads vs 3 heads
Quote:
Quote by HallsofIvy (Post 2330330)
I can't speak for why your teacher gave you a weird look but the point you are missing is that [itex](0.5)^{50}[/itex] is the probability of getting 25... | 4 | [
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Linear Increment Across Fixed Distance
September 8th 2007, 04:54 AM
CarlaT
Linear Increment Across Fixed Distance
Hi all,
Could someone please give me a few pointers on how to solve the following:
I need to divide a 9mm distance into linearly incrementing portions, the first of which must measure 0.01m... | 4 | [
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... | 21,258 | 21258 | |
Please help to find k and remainder
October 15th 2007, 06:45 AM #1
Member
Joined
Oct 2007
Posts
134
Please help to find k and remainder
Problem 1: Find k such that f(x)=x^4-kx^3+kx^2+1 has the factor (x+2)
Problem 2: What is the remainder when f(x)=-3x^17+x^9-X^5+2x is divided by (x+1)
Thank you... | 4 | [
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A Nice Separation of Some Seiffert-Type Means by Power Means
International Journal of Mathematics and Mathematical Sciences
Volume 2012 (2012), Article ID 430692, 6 pages
http://dx.doi.org/10.1155/2012/430692
Research Article
A Nice Separation of Some Seiffert-Type Means by Power Means
^1Department of Computer Sc... | 5 | [
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Mixed Convection Flow Adjacent to a Stretching Vertical Sheet in a Nanofluid
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 696191, 6 pages
http://dx.doi.org/10.1155/2013/696191
Research Article
Mixed Convection Flow Adjacent to a Stretching Vertical Sheet in a Nanofluid
^1Faculty of Computer and Math... | 4 | [
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Strength Of A Beam
June 11th 2009, 12:46 AM #1
Strength Of A Beam
Hi All,
Not sure if this is in the right section, but would love your help with this.
Engineers have determined that the strength s of a rectangular beam varies as the product of the width w and the square of the depth d of the beam, tha... | 5 | [
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problem with sinus :)
January 12th 2009, 02:03 PM #1
Member
Joined
May 2008
Posts
171
problem with sinus :)
Hey guys.
cos(n*x) when n is natural and x=pi equals to (-1)^n as I wrote in the pic.
What I'm looking for is the same thing in sinus, lets say again that n is natural, is there a x that ca... | 5 | [
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A Linear Model of Phase-Dependent Power Correlations in Neuronal Oscillations
Introduction
Different situations may require different aspects of knowledge stored in the brain (Dayan et al., 2000). This adaptive knowledge selection can be achieved by enhancing the influence of a specific
set of synapses. The selective ... | 4 | [
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Solve for x
First off, we can't have $x\leq 0$ Remember the rule $\log_a(m)+\log_a(n)=\log_a(mn)$? Using this rule we get $\ln[x(x-1)]=1$ $x(x-1)=e^1$ $x(x-1)=e$ $x^2-x=e$ $x^2-x-e=0$ Then using the quadratic
formula, namely If $ax^2 + bx + c = 0$ then $x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}$ we get as our solution for x..... | 4 | [
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Fluids (Through an IV) Question
Andy Resnick
It very much applies- from your first URL:
"The pressure at a point in a static liquid is due entirely to the weight of liquid (plus the atmosphere) directly above it"
Which is what I have been saying all along. You are neglecting the role of the stopcock/valve in my ex... | 5 | [
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Patent US7103095 - Spread spectrum code correlator
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority from provisional application Ser. No. 60/186,988, filed Mar. 6, 2000.
BACKGROUND OF THE INVENTION
The invention relates to electronic devices, and, more particularly, to detection in spread spe... | 4 | [
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logarithm
October 23rd 2006, 05:21 PM
andrew93
logarithm
could you possibly help me out? I am stuck on two questions
the general term of an infinite sereis is tn= ( pie square) (3/11)^ n+1. how many terms must be added to reach a sum that is greater than 0.32?
t1 = (pie square) (3/11)2 = 0.233672181
... | 5 | [
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Physics Forums - Method of Least Squares Linear Fitting
Defennder Aug30-07 10:02 AM
Method of Least Squares Linear Fitting
1. The problem statement, all variables and given/known data
An experiment was conducted on a liquid at varying temperatures and the volume obtained at the differing temperatures are as follo... | 4 | [
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Matrix (I think) question
July 21st 2013, 09:12 AM
Paze
Matrix (I think) question
I'm reading and learning through a finals exam for what I will be learning next year (I'm usually a year ahead) and there's a question:
A). Find the transpose of the matrix A
http://i.imgur.com/MEWDtOI.png
B). Show t... | 4 | [
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Help: (X+1)/(X-1)
January 30th 2009, 04:12 AM
thomas33
Help: (X+1)/(X-1)
Hi,
Im having some problems solving following equation:
2^(X+1) = 3^(X-1) -> log 3/log 2 = (X+1)/(X-1).. but i cant get any further, please help.
How do i continue with (X+1)/(X-1) ? my guess is to get (X-1) to a number without ... | 4 | [
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... | 21,271 | 21271 | |
Modeling of Partially Hydrolyzed Polyacrylamide-Hexamine-Hydroquinone Gel System Used for Profile Modification Jobs in the Oil Field
Journal of Petroleum Engineering
Volume 2013 (2013), Article ID 709248, 11 pages
http://dx.doi.org/10.1155/2013/709248
Research Article
Modeling of Partially Hydrolyzed Polyacrylamide-H... | 4 | [
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Prominent hydraulics consulting company problem
You are the Chief Engineer for a prominent hydraulics consulting company. Your client wants to pay you lots of money to design a system to deliver 1 m3/s from reservoir A at elevation 300 m to
reservoir B at 500 m. The distance from A to B is 1000 km and the elevation bet... | 5 | [
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Need Physics help pls
November 7th 2012, 11:55 AM #1
Member
Joined
Aug 2012
From
new orleans
Posts
131
Thanks
1
Need Physics help pls
If a 75-kg sprinter can accelerate from 0.3 m/s to a speed of 10 m/s in 2 s, what average power is generated?
a. What is the Change in Kinetic Energy of the s... | 4 | [
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-0.00970458984... | 21,274 | 21274 | |
Relations between Coefficents of Polynomials
September 11th 2010, 12:31 AM #1
Member
Joined
Jul 2009
Posts
132
Relations between Coefficents of Polynomials
Given ax^3 + bx^2 + cx + d = 0
and roots are e, 2e, 3e
Find relation between coefficients.
I approached this firstly with addition of ... | 5 | [
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Joint Gain/Phase and Mutual Coupling Array Calibration Technique with Single Calibrating Source
International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 625165, 8 pages
http://dx.doi.org/10.1155/2012/625165
Research Article
Joint Gain/Phase and Mutual Coupling Array Calibration Technique with ... | 4 | [
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Investment word problem w/differential equations
April 29th 2008, 07:23 PM #1
Junior Member
Joined
Nov 2007
Posts
53
Investment word problem w/differential equations
Ok, here's the problem:
Investment. Let A(t) be the amount in a fund earning interest at the annual rate of r, compounded continuously... | 5 | [
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Patent US7242721 - Method for estimating the transfer function of a multicarrier signal transmission channel and corresponding receiver
CROSS-REFERENCE TO RELATED APPLICATION
This Application is a Section 371 National Stage Application of International Application No. PCT/FR02/01639 filed May 15, 2002 and published as... | 4 | [
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... | 21,278 | 21278 | |
The Existence of Positive Solutions for a New Coupled System of Multiterm Singular Fractional Integrodifferential Boundary Value Problems
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 368659, 15 pages
http://dx.doi.org/10.1155/2013/368659
Research Article
The Existence of Positive Solutions for a New C... | 5 | [
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-0... | 21,279 | 21279 | |
Approximating difference between sides of triangle
March 15th 2013, 02:10 PM
gralla55
Approximating difference between sides of triangle
How can I show that when r >> d, R1 - R2 is approximately equal to d cos theta? This was an intermediate step in my physics book when they derived some formula, and it just dri... | 4 | [
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Physics Forums - View Single Post - How to solve this Riccati equation?
If you write a little bit more prettier, you can define a new B matrix as
[itex]
\hat B \hat B^T = \left[\begin{array}{cc}B_1 &B_2\end{array}\right]\left[\begin{array}{cc}\gamma &0\\0 &R^{-1}\end{array}\right]\left[\begin{array}{cc}B_1 &B_2\end{ar... | 4 | [
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dy/dx=e^(-x^2) - 2xy subject to y(2)=0
June 3rd 2011, 06:14 AM
metalkakkarot
dy/dx=e^(-x^2) - 2xy subject to y(2)=0
hi,
need some help for this question, i tried solving by seperating dy to one side and dx to the other and integrating however dont get the right answer...how can i solve this
any help much... | 5 | [
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Help with finding the derivative of inverse functions
January 23rd 2008, 04:41 PM #1
Newbie
Joined
Oct 2007
Posts
14
Help with finding the derivative of inverse functions
Hey I need some help with the following problems:
Find (f^-1)'(a):
1. f(x)= 2x^3 + 3x^2 + 7x + 4, a=4
2. f(x)= x^3 + 3s... | 5 | [
-0.0308837890625,
-0.051025390625,
0.0184326171875,
0.00933837890625,
-0.02099609375,
-0.016845703125,
0.038818359375,
0.0294189453125,
0.00677490234375,
0.10302734375,
0.0908203125,
-0.0751953125,
0.026123046875,
-0.0274658203125,
-0.0211181640625,
0.044677734375,
-0.0277099609375,
... | 21,283 | 21283 | |
Need Urgent Help!! Probability Quesiton
November 7th 2008, 06:40 AM #1
Newbie
Joined
Nov 2008
Posts
4
Need Urgent Help!! Probability Quesiton
p=80% (chances of winning a game)
n=5 (number of games)
expected value of x=4
How do I find the variance and standard deviation of x?
And also, h... | 4 | [
0.12060546875,
0.041259765625,
0.06494140625,
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0.05859375,
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0.0615234375,
0.01611328125,
0.076171875,
-0.0274658203125,
0.039794921875,
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0.01611328125,
-0.004180908203125,
0.056396484375,
0.00543212890625,
-0.017944... | 21,284 | 21284 | |
-Contractions on Gauge Spaces and Applications
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 730825, 7 pages
http://dx.doi.org/10.1155/2013/730825
Research Article
Fixed Point Results for --Contractions on Gauge Spaces and Applications
^1Department of Mathematics, College of Science, King Saud Univers... | 5 | [
-0.11083984375,
-0.050048828125,
0.00701904296875,
0.000865936279296875,
-0.0311279296875,
0.115234375,
0.1318359375,
-0.03759765625,
0.0537109375,
-0.0206298828125,
0.080078125,
0.057373046875,
-0.006195068359375,
0.047607421875,
-0.043212890625,
0.010009765625,
-0.0255126953125,
... | 21,285 | 21285 | |
Conformal Gravity and the Alcubierre Warp Drive Metric
ISRN Astronomy and Astrophysics
Volume 2013 (2013), Article ID 482734, 13 pages
http://dx.doi.org/10.1155/2013/482734
Research Article
Conformal Gravity and the Alcubierre Warp Drive Metric
Department of Physics, Loyola Marymount University, Los Angeles, CA 9004... | 4 | [
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Euler problems/81 to 90
From HaskellWiki
< Euler problems
(Difference between revisions)
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← Older edit Newer edit →
Line 185: ... | 5 | [
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Subgroup proof check
April 11th 2011, 12:22 PM #1
Subgroup proof check
Here's the problem:
Given that H, K, and N are subgroups of G with H < N, $H \cap K = K \cap N$ and HK = HK. Prove H = N.
Okay, here we go ladies and gents!
$K \cap N = H \cap K$
Since
$H(K \cap N) = HK \cap N$ <--From ... | 5 | [
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... | 21,288 | 21288 | |
Scaling Group Transformation for MHD Boundary Layer Slip Flow of a Nanofluid over a Convectively Heated Stretching Sheet with Heat Generation
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 934964, 20 pages
http://dx.doi.org/10.1155/2012/934964
Review Article
Scaling Group Transformation for MHD B... | 5 | [
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-0.16308... | 21,289 | 21289 | |
Series Solutions to 2nd Order DEs HELP!
November 23rd 2008, 01:42 PM
Happy Dancer
Series Solutions to 2nd Order DEs HELP!
x^2 y" + 2 x^2 y' -2y = 0
I need to find the indicial equation and find the values of k but I don't understand how to find po and qo.
Thanks
November 23rd 2008, 02:35 PM
shawsend
... | 4 | [
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0.0113525390625,
-0.0245361328125,
0.033935546875,
-0.02685546875,
-0.023... | 21,290 | 21290 | |
Hausdorff Dimension
Show that the graph of a Lipschitz function in $\mathbb{R}^{2}$ has Hausdorff dimension 1.
Clearly it suffices to check this for a Lipschitz function on a compact interval $[a,b]$. Denote by $M$ the Lipschitz constant fo $f$. Subdivide $[a,b]$ into $m$ intervals of length $(b-a)/m$, we use
these to... | 5 | [
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-0.07666015625,
-0.05126953125,
0.0478515625,
0.0771484375,
-0.03320312... | 21,291 | 21291 | |
Permutation Problem
October 20th 2008, 07:30 AM
skyskiers
Permutation Problem
Please help in the following problem...
There are 8 envelops and 8 corresponding letters. Find the probability that :-
a) At least 2 letters go to the wrong envelops.
b) None of the letters go in to the right envelop.
... | 5 | [
0.00122833251953125,
-0.044189453125,
0.09765625,
0.003173828125,
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0.0888671875,
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-0.02587890625,
-0.019775390625,
0.0654296875,
0.00421142578125,
-0.06494140625... | 21,292 | 21292 | |
How to solve a system of linear equations when there are less rows than variables?
September 22nd 2009, 01:56 PM #1
Newbie
Joined
Sep 2009
Posts
5
How to solve a system of linear equations when there are less rows than variables?
I took a year off from Math before deciding to major in it, so I'm a little... | 4 | [
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-0.020874023437... | 21,293 | 21293 | |
Linear programming (maximizing)
February 4th 2013, 10:21 AM #1
Newbie
Joined
Jan 2013
From
South Africa
Posts
14
Linear programming (maximizing)
I am not sure whether I have done this right or that my answer is correct. I have a strong feeling that tells me it is not right. Could you please check it ... | 4 | [
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Help with question mass/displacement
From the initial conditions we know that:
[itex]x(0)=0 m[/itex]
[itex]v(0)=1 m/s[/itex]
I'm going to keep using the notations v(t) and x(t) to try to remind you that v and x are functions of t, which is very important when doing calculus.
For a constant mass:
[itex]F(v(t))=ma=m\fr... | 5 | [
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-0.00029563903808... | 21,295 | 21295 | |
Patent US5491724 - Mean phase predictor for maximum a posteriori demodulator
STATEMENT REGARDING GOVERNMENTAL RIGHTS
The present invention was made with support from the United States Government under Contract Nos. NAS3-26959, NAS3-26391 awarded by the National Aeronautics and Space Administration (NASA). The
Governme... | 4 | [
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0.038818359375,
-0... | 21,296 | 21296 | |
Solving an inequality
Quote:
Why cant you cross multiply the denominator? Why cant |x|>-1 since |-3|>-1. |3|>-1, |0|>-1? (Wondering)
Quote:
For part(a), you should know you can't multiply either of the denominators like how an algebraic equation involving rational function is solved. First step, move... | 4 | [
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0.0027618408203... | 21,297 | 21297 | |
Well-Posedness by Perturbations of Generalized Mixed Variational Inequalities in Banach Spaces
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 194509, 38 pages
http://dx.doi.org/10.1155/2012/194509
Research Article
Well-Posedness by Perturbations of Generalized Mixed Variational Inequalities in Banach S... | 4 | [
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-0.017... | 21,298 | 21298 | |
Patent US7394792 - Multi-scale CDMA
BACKGROUND OF THE INVENTION
I. Field of the Invention
The present invention relates to CDMA (Code Division Multiple Access) cellular telephone for wireless wide area cellular networks WAN's, local area networks LAN's, personal area networks PAN's and
wireless data communications wi... | 4 | [
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