content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Numerical solution to equations with log?
Based on the Matlab code sent in your PM, I played around and have the following comments:
1. My guess is that the Matlab code freezes because Nqw1 or Nqw2 become negative, which is illegal because of the log function. You might want to put a check in your code for that.
2. T... | 4 | [
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-0.03063... | 18,500 | 18500 | |
Setting Up Epidemic SIR Model
October 1st 2011, 05:04 PM
Len
Setting Up Epidemic SIR Model
Question:
Model a daycare that measles spreads when a sick child comes in. In this daycare, we have 100 susceptible children, and there is a recruitment rate of 5 new kids per year. The rate at which
measles is tr... | 4 | [
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Patent US5657350 - Audio coder/decoder with recursive determination of prediction coefficients based on reflection coefficients derived from correlation coefficients
RELATED APPLICATION
This application is related to concurrently filed co-pending application Ser. No. 08/362,515, filed on Jan. 5, 1995, of the same inve... | 4 | [
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Finding asymptotes to the curve.
Find all the Asymptotes to the curve $(2x+3)y = (x-1)^2$
1. The equation of the vertical asymptote $x = {\text{const}}$ of $y = \frac{{\left( {x - 1} \right)^2 }}{{2x + 3}}$: $2x + 3 = 0{\text{ }} \Leftrightarrow {\text{ }}2x = - 3{\text{ }} \
Leftrightarrow {\text{ }}x = - \frac{3}{2}... | 5 | [
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linear algebra problem: consequences of im(T)=ker(T) ?
November 18th 2007, 05:40 AM
mongrel73
linear algebra problem: consequences of im(T)=ker(T) ?
I can't work out how to do this proof.
V is a vector space of dimension n where n >/= 1.
T: V --> V is a linear transformation.
You need to show that t... | 4 | [
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Solving an integral equation by iteration
January 31st 2013, 02:35 AM #1
Newbie
Joined
Jan 2013
From
Israel
Posts
1
Solving an integral equation by iteration
Hello guys!
I was given a Volterra integral equation y(x)=1/2*x^2+integral(0--->x) [t(t-x)y(t)]dt to solve using iteration. I have no idea... | 4 | [
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Application of first order differential equation-tomorrow test
May 29th 2009, 08:17 AM #1
Junior Member
Joined
Sep 2008
From
Australia
Posts
72
Application of first order differential equation-tomorrow test
I have a problem of this type of question.
An object thrown into a large body of water coo... | 5 | [
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Integration - Unfamiliar
October 1st 2009, 11:59 PM #1
Integration - Unfamiliar
How could this be integrated?
$\int {\sqrt {{e^{2t}} + {e^{ - 2t}} + 2} } dt$
I vaguely remember using logs to help integrate (or maybe differentiate), but I'm at a loss here.
Any help will be appreciated.
$\int \s... | 4 | [
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Writing a recursive definition for Sn
February 14th 2013, 12:57 PM
njuice8
Writing a recursive definition for Sn
Find a formula for tn, the nth term of the series. Then give a recursive definition for Sn, the sum of n terms of the series.
1) 8+12+18+27+....
2) 50+47+44+41+....
I know how to find t... | 4 | [
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Brevet US6006316 - Performing SIMD shift and arithmetic operation in non-SIMD architecture by operation on packed data of sub-operands and carry over-correction
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to data registers in microprocessor circuitry and more particularly to... | 4 | [
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Patente US6961680 - Synthesized high speed digital filters
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a synthesized digital filter made from analog components or optical components.
2. Description of Related Art
The basic function of digital filters is to manipulate a sam... | 4 | [
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Earth ellipsoid due to rotation
Ulrich
The formula [itex]h≈r^4 w^2/(2 G M - r^3 w^2) [/itex] is a good approximation for small h.
No, it is not. First, just drop that [itex]r^3\omega^2[/itex] term of yours. It's tiny, less about 0.1% of GM. There's no reason to carry around a 0.1% correction term when you're off by... | 4 | [
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On the Variational Problems without Having Desired Variational Symmetries
Journal of Mathematics
Volume 2013 (2013), Article ID 685212, 4 pages
http://dx.doi.org/10.1155/2013/685212
Research Article
On the Variational Problems without Having Desired Variational Symmetries
School of Mathematics, Iran University of Sc... | 5 | [
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Property of Logs
May 20th 2007, 10:38 PM #1
Newbie
Joined
May 2007
Posts
2
Property of Logs
This question has been bugging me lately
If a>0, use the functional equation for the logarithm to prove that log (a^r) = r log a for every rational number r.
Earboth only proved it for positive integers.... | 4 | [
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Trigonometric equation
July 17th 2010, 02:04 PM #1
Newbie
Joined
Jul 2010
Posts
12
Trigonometric equation
Can anybody help me with this equation? I am staring to think there is a mistake there....
I tried to factor it, but it does not seem right...
2sin^2(x) - 6sin(x)- 3=0
Last edited by An... | 4 | [
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Patent US6831944 - Reduced computation in joint detection
This application claims priority to U.S. Provisional Patent Application No. 60/153,801, filed on Sep. 14, 1999.
BACKGROUND
The invention generally relates to wireless communication systems. In particular, the invention relates to joint detection of multiple us... | 4 | [
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Hypoteneuse of an isosceles right triangle
June 23rd 2011, 11:51 AM
KingNathan
Hypoteneuse of an isosceles right triangle
I am studying for the GMAT, and I have hit a snag. This is the question and answer.
The perimeter of an isosceles right triangle is 16+16 sqr root(2). What is the length of the hypoteneu... | 4 | [
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Average Rate of Change of a Function
July 3rd 2007, 01:55 PM #1
Member
Joined
Jul 2007
Posts
90
Average Rate of Change of a Function
I will take Jhevon's advice and ask as many questions as I want. I am having trouble with a problem. The problem is:
What is the average rate of change of the functio... | 4 | [
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graph equations
February 20th 2010, 11:16 PM #1
Junior Member
Joined
Jun 2008
Posts
53
graph equations
the curve, C has the equation:
$4(x+1)^2 - (y-1)^2 =1$
Find the greatest value of k, where k is a positive integer, for which the curve $y=ln(x+k)$ cuts C at only one point.
what i tried ... | 5 | [
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Trigonometry/Derivative of Cosine
To find the derivative of cos(θ).
$\frac{d}{d\theta} \cos(\theta) = \lim_{h \rightarrow 0} \frac{\cos(\theta+h)-\cos(\theta)}{h} = -\lim_{h \rightarrow 0} \frac{2\sin(\theta+\frac{h}{2})\sin(\frac{h}{2})}{h} = -\lim_{h \
rightarrow 0} {\left(\sin\left(\theta+\frac{h}{2}\right)... | 5 | [
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Divergence Theorem
April 26th 2009, 09:04 PM #1
Member
Joined
Oct 2008
Posts
124
Divergence Theorem
Use the Divergence Theorem to find the flux of F across the surface sigma with outward orientation.
F(x,y,z) = 2xzi + yzj + z^2k, where sigma is the surface of the solid bounded above by z = sqrt(a^2-... | 5 | [
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can anyone solve...2(2x-4)=9-2(x+1)
can anyone solve...2(2x-4)=9-2(x+1) I keep gettin different answers...can someone show me what im doing wrong? My finals are tommorow!
Last edited by mr fantastic; March 11th 2009 at 05:59 PM. Reason: Copied thread title into the question
$2(2x-4)=9-2(x+1)$ First step is to multipl... | 4 | [
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IR question _Two Part Analysis
Author Message
debabrata44 IR question _Two Part Analysis [#permalink] 02 Jul 2012, 14:58
Intern
Joined: 05 Dec 2011
Please explain me how ... | 4 | [
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Patent US7433413 - Data transmission apparatus and method in an OFDM communication system
PRIORITY
This application claims priority under 35 U.S.C. § 119 to an application entitled “Data Transmission Apparatus and Method in an OFDM Communication System” filed in the Korean Intellectual Property
Office on Dec. 24, 2003... | 4 | [
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How far will sound wave travel in 2 minutes?
December 8th 2010, 05:36 PM #1
Newbie
Joined
Dec 2010
Posts
1
How far will sound wave travel in 2 minutes?
How would I explain and answer this please?
The speed of sound is 331.6 meters per second. in miles how far will sound travel in 2 minutes?
Las... | 4 | [
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Average force on an electron in a wire
January 26th 2011, 12:35 PM #1
Hey, just did a 25 question multiple choice paper and this was the only one that I got wrong. Was hoping someone could enlighten me.
AQA PHYA4/1 Jan 2010
A current of $8.0\, A$ is passed through a conductor of length $0.40 \,m$ and cr... | 4 | [
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Maxwell Lagrangian
P: 7 Hello,
Where can I find a good explanation (book) of the derivation via Noether's theorem of the three momentum and angular momentum operators of the usual maxwell
lagrangian ?
Thank you!
Sci Advisor ... | 4 | [
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hard double integral
May 7th 2008, 01:08 AM #1
Junior Member
Joined
Feb 2006
From
Victoria, Australia
Posts
36
hard double integral
Im stuck on this double integral, i cant see how it can be done!
Outer limit 0 - pi/2 inner limit x - pi/2
siny/y dydx
also this one
Outer limit 0 -... | 5 | [
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-0.0556640625,
-0.02... | 18,527 | 18527 | |
Epsilon nr 2
February 14th 2013, 04:31 AM
Petrus
Epsilon nr 2
Hello this is almost same problem like last one. (ima try my best with latex)
for the limit
lim x-> -infinty $\frac{\sqrt{4x^2+1}}{x+1}=-2$*
illustrade Defination 8 by finding values of N that correspond to $\varepsilon=0.5$ and $\varepsil... | 5 | [
0.0027313232421875,
0.0198974609375,
0.095703125,
0.016357421875,
0.0205078125,
-0.052490234375,
0.0250244140625,
0.10205078125,
0.08056640625,
-0.08203125,
0.1103515625,
-0.0927734375,
0.068359375,
0.0771484375,
-0.0810546875,
0.004302978515625,
0.03515625,
-0.037841796875,
-0.0... | 18,528 | 18528 | |
Probability Problem
January 6th 2009, 11:38 PM
zorro
Probability Problem
If one bag contains 4 white and 2 black balls; another contains 3 white and 5 black balls. If one ball is drawn from each bag
find the probability that
i) both are white
ii) one is white and one is black.
January 7th 2009, 02:4... | 4 | [
0.04150390625,
0.03759765625,
-0.017822265625,
0.0162353515625,
0.04541015625,
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0.019287109375,
-0.00174713134765625,
0.035888671875,
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-0.023681640625,
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0.0947265625,
0.0693359375,
-0.017578125,
0.0947265625,
-0.015869140625,
-0.0520019... | 18,529 | 18529 | |
Brevet US7526518 - Galois field multiplication system and method
FIELD OF THE INVENTION
This invention relates to the field of computational systems. In particular, the present invention relates to a Galois field multiplication system and method.
BACKGROUND OF THE INVENTION
Electronic systems and circuits have made ... | 4 | [
-0.0034332275390625,
0.03125,
-0.06591796875,
-0.08837890625,
-0.0869140625,
-0.06494140625,
0.0322265625,
0.0380859375,
0.034423828125,
-0.031494140625,
0.01348876953125,
0.006591796875,
0.054931640625,
-0.040283203125,
-0.02734375,
0.04296875,
-0.1337890625,
0.050537109375,
-0.... | 18,530 | 18530 | |
Components of a magnetic field in a uniform wire
I have been working on it for the past hour or so, and seem to have come up with some sort of solution, but it isn't the most elegant one.
I looked at the case of the magnetic field inside just one of the wires (say, in this case, the one to the right, centred at (α,β) ... | 4 | [
-0.11279296875,
0.05224609375,
-0.05224609375,
-0.04443359375,
0.07177734375,
0.043212890625,
0.061279296875,
-0.0196533203125,
0.0162353515625,
0.017822265625,
0.031982421875,
-0.00787353515625,
0.04638671875,
0.05078125,
-0.0289306640625,
0.07861328125,
-0.0272216796875,
-0.04541... | 18,531 | 18531 | |
Laurent Series
April 25th 2010, 06:03 PM #1
Newbie
Joined
Apr 2010
Posts
1
Laurent Series
Hi guys,
I need help with a problem. we need to find the Laurent series in this problem.
we have the partial fraction
f(z) = 4/z((1/1+z) + (1/2-z). Now it says, for 0 < |z| < 1, we expand each of the ... | 5 | [
-0.048095703125,
0.03271484375,
0.0341796875,
0.08447265625,
0.035888671875,
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0.05078125,
-0.0172119140625,
0.009765625,
-0.04345703125,
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0.06396484375,
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0.000484466552734375,
0.0291748046875,
-0.07958984... | 18,532 | 18532 | |
An interesting poker probabilty question
June 20th 2010, 03:04 PM #1
Newbie
Joined
Mar 2010
Posts
15
An interesting poker probabilty question
I've been wondering how to compute this one for a while, and I've done some initial work but it seems to be going nowhere.
Find the probability of holding a R... | 5 | [
-0.0260009765625,
0.04345703125,
0.048583984375,
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-0.0830078125,
-0.0074462890625,
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0.033935546875,
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0.05712890625,
-0.11083984375,
-0.0390625,
-0.0634765625,
0.00421142578125,
-0.004913330078125,
0.0245361328125,
0.0208740234375,
-0.... | 18,533 | 18533 | |
Prime Numbers
Author Message
TAGS:
00:00
B
C
maheshsrini D
Manager ... | 4 | [
0.0108642578125,
0.0341796875,
-0.01171875,
-0.048828125,
-0.0673828125,
0.039306640625,
0.10693359375,
0.07080078125,
-0.045166015625,
0.053466796875,
-0.061279296875,
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0.0615234375,
-0.08837890625,
-0.037841796875,
0.0146484375,
-0.0576171875,
-0.06494140625,
... | 18,534 | 18534 | |
Distribution-Free Continuous Review Inventory Model with Controllable Lead Time and Setup Cost in the Presence of a Service Level Constraint
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 867847, 16 pages
http://dx.doi.org/10.1155/2012/867847
Research Article
Distribution-Free Continuous Review I... | 5 | [
-0.0185546875,
0.028076171875,
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0.038330078125,
0.043701171875,
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-0.00421142578125,
-0.0322265625,
-0.0849609375,
0.032470703125,
-0.125,
-0... | 18,535 | 18535 | |
Patent US7327846 - Secure cryptographic key exchange and verifiable digital signature
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to cryptography and, more particularly, to exchanging cryptographic keys between two cryptographic units for a single cryptographic sessio... | 4 | [
-0.0947265625,
0.0498046875,
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-0.04736328125,
0.05859375,
... | 18,536 | 18536 | |
Wheel Trig Problem
November 19th 2007, 08:39 AM #1
Member
Joined
May 2007
Posts
150
Wheel Trig Problem
A pebble is wedged in the bottom of a tire. The horizontal distance of the pebble from the left-most edge of the tire varies sinusoidally with the distance you have traveled. Diameter is 5pi
inches
... | 5 | [
-0.01495361328125,
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0.057373046875,
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0.052001953125,
-0.036865234375,
-0.0072... | 18,537 | 18537 | |
Set Theory/Relations
From Wikibooks, open books for an open world
Ordered pairs[edit]
To define relations on sets we must have a concept of an ordered pair, as opposed to the unordered pairs the axiom of pair gives. To have a rigorous definition of ordered pair, we aim to satisfy one
important property, namely, for s... | 4 | [
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0.0228271484... | 18,538 | 18538 | |
Matlab Exercises 1
MATLAB EXERCISES 1
There are hints, answers and links to how to do the more complex exercises below - try NOT to look at them unless you really need to - try and figure things out using the helpdesk and experimentation
first.
Create an array a
a = [2 4 6 8 10];
and plot the values of a
plot(a)
... | 4 | [
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0.05224609375,
0.0634765625,
-0.1015625,
0.0002613067626... | 18,539 | 18539 | |
height of a traingle
May 13th 2008, 01:19 AM #1
Newbie
Joined
May 2008
Posts
2
height of a traingle
Hi, i have a question where as it tells me that i need to find the area, i know to find the area of a traingle its half the base times the height, just i don't have the height and don't know how
to fin... | 4 | [
0.0032958984375,
0.09228515625,
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0.033935546875,
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0.15625,
-0.07421875,
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0.051025390625,
0.004669189453125,
0.0206298828125,
0.0390625,
-0.0152587890625,
0.07421875,
0.0034942626953125,
0.076171875,
-0.... | 18,540 | 18540 | |
counting
Question Stats:
56%44% (02:20)based on 9 sessions
AkritiMehta wrote:
Choosing 2 vowels out of five with repetitions = 5*5
choosing 2 consonants out of 20 (26-5 vowels-Q) =20*20
and since we need different arrangements we need to divide by 2!*2!
=5*5*20*20/2!*2!= 2500
You might look at your calculation ju... | 4 | [
0.015380859375,
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0.09375,
-0.03564453125,
-0.052490234375,
... | 18,541 | 18541 | |
Math Help
April 2nd 2009, 08:16 AM #1
Junior Member
Joined
Jul 2008
Posts
26
Help
If a1,a2,...an are in A.P. where ai>0 then value of
1/(sq root a1+sq root a2) + 1/(sq root a2+sq root a3) +.......... 1/sq root an-1 + sq root an = ??
I did not knw how to write it in proper form but hope u under... | 4 | [
-0.052734375,
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0.0086669921875,
0.00848388671875,
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0.0013885498046875,
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0.06103515625,
-0.0224609375,
-0.03784179... | 18,542 | 18542 | |
Geodesics in a constant gravitational field
I worked on something similar a while back and this is what I found.
By the equivalence principle, a constant "gravitational" field would be the same as with constant acceleration, so we can just use SR for an accelerating observer. With Rindler or for a ship of
observers ac... | 5 | [
-0.05712890625,
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0.07958984375,
0.08935546875... | 18,543 | 18543 | |
amount of work
June 6th 2007, 02:53 AM #1
Junior Member
Joined
Mar 2007
Posts
63
amount of work
If water is pumped in through the bottom of the tank in the picture, how much work is done to fill the tank:
a. To a depth of 2 feet?
b. From a depth of 4 feet to a depth of 6 feet?
Here's what I ... | 5 | [
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0.03125,
-0.060791015625,
0.0104980... | 18,544 | 18544 | |
Set Theory problem
February 24th 2008, 02:35 PM #1
Newbie
Joined
Jan 2008
Posts
11
Set Theory problem
Hey, can anyone please help me with this problem:
For all sets A, B, C, prove
If $A-C = \emptyset$ then $(A \cup B) - (B \cap C) = (A-B) \cup (B-C)$
This is what I have done so far, but I s... | 4 | [
0.047119140625,
0.02783203125,
0.06494140625,
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0.042724609375,
0.053955078125,
0.041259765625,
0.0556640625,
-0.0059... | 18,545 | 18545 | |
continuety parameter question..
i tried to solve it but i didnt get any parameter value ?? http://img403.imageshack.us/img403/5...9192yz6.th.gif
Look carefully... the definition $x^m \sin \frac1{x}$ holds only for $x eq 0$. You cant simply substitute 0 in the place of x to check for continuity. Thus your problem for m... | 5 | [
0.0020599365234375,
0.0361328125,
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0.07470703125,
0.01806640625,
0.044921875,
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0.017822265625,
0.09326171875,
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0.0164794921875,
0.058349609375,
0.01324462890625,
0.07763671875,
0.017578125,
-0.066894531... | 18,546 | 18546 | |
Proof of the Frenet-Serret formulae
micromass
It's weird that you need to use the chain rule. But first, what is the definition of [itex]\kappa[/itex]??
[itex] \kappa [/itex] is the rate of change of the tangent vector of a curve with respect to arc length, ie a measure of how much the tangent vector changes in mag... | 4 | [
-0.05517578125,
0.01123046875,
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0.087890625,
0.0693359375,
0.0166015625,
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-0.041259765625,
-0.037841796875,
-0.07373046875,
0.06591796875,
0.020... | 18,547 | 18547 | |
circular permutation
January 7th 2010, 05:55 AM #1
circular permutation
Suppose there are $n$ families with $5$ people in each family for a total of $5n$ people arranged around a circular table. How many ways are there to seat the people such that each person sits
next to another member of his family?
So... | 4 | [
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0.0194091... | 18,548 | 18548 | |
Patent US6366854 - Method and apparatus for measuring displacement of object using GPS
FIELD OF THE INVENTION
The present invention relates to a displacement measuring method and apparatus that install a GPS receiver in, for example, a floating body floating on the sea surface to detect the position of this
floating b... | 4 | [
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-0.0654296875,
0.032470703125,
... | 18,549 | 18549 | |
Gcd, Euclidean Algorithm, Polynomials
October 21st 2006, 02:14 PM #1
Junior Member
Joined
Jul 2006
Posts
43
Gcd, Euclidean Algorithm, Polynomials
Find the GCD using the Euclidean Algorithm of
(4x^4)+(2x^3)+(6x^2)+4x+5
and
(3x^3)+(5x^2)+6x
in Z7[x].
So I divided the polynomials and ke... | 5 | [
-0.07373046875,
-0.00799560546875,
-0.095703125,
0.036865234375,
0.022216796875,
-0.08984375,
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0.0189208984375,
-0.0595703125,
0.00946044921875,
-0.021240234375,
0.005981... | 18,550 | 18550 | |
Confused with notation
LagrangeEuler
Yes just that. Strange. And how to write ##\sum_{i<j}## if you have vectors ##\vec{i},\vec{j}##?
Yeah, it doesn't make sense if you think of i,j as vectors. The upshot is that you don't have to - the indices are just supposed to label all sites. As long as your system has finite... | 4 | [
0.025390625,
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0.061279296875,
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0.038330078125,
-0.050537109375,
-0.00244140625,
0.036865234375,
0.0498046875,... | 18,551 | 18551 | |
Spinning around a cylinder with a person inside
Mathman23
Hi and thanks for Your answer.
Then the forces acting on the person and cylinder must be [itex]f_{s} = \mu_{s} \cdot n[/itex] , [itex]F_{g} = m \cdot g[/itex] , [itex]F_{z} = m \cdot a[/itex]
You didn't observe that the normal force the wall applies on the pe... | 5 | [
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0.060546875,
0.0419921875,
-0.03369140625,
-0.00726318359375,
-0.01263427734375,
... | 18,552 | 18552 | |
A box contains 10 light bulbs, fewer than half of which are
Author Message
TAGS:
A box contains 10 light bulbs, fewer than half of which are [#permalink] 12 Jan 2008, 01:54
... | 4 | [
0.051513671875,
0.076171875,
0.05810546875,
0.0213623046875,
0.0140380859375,
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0.00433349609375,
-0.031982421875,
0.0164794921875,
-0.07568359375,
... | 18,553 | 18553 | |
Can someone help me prove these two identities?
April 5th 2010, 01:14 PM #1
Newbie
Joined
Apr 2010
Posts
6
Can someone help me prove these two identities?
Can someone help me prove these two identities?
I have to prove these two identities and they're really giving me a hard time :/
I need to se... | 4 | [
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0.049560546875,
0.060546875,
0.0556640625,
0.0140380859375,
0.0289306640625,
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0.002532958984375,
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0.044677734375,
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0.00537109375,
0.01300048828125,
0.02331... | 18,554 | 18554 | |
Countable set
October 7th 2012, 01:20 PM
jackie
Countable set
Could someone give me a hand on this problem?
Let $X \subset R^n$ such that for every $x \in X$ there exists a neighborhood $N_r(x)$ such that $N_r(x) \bigcap X$ is at most countable. Prove that $X$ is at most countable.
October 7th 2012, 04:52 P... | 5 | [
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-0.025146484375,
0.0005645751953125,
0.037353515625,
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0.09765625,
-0.0208740234375,
-0.047607421875,
0.021728515625,
-0.0664062... | 18,555 | 18555 | |
Operations Research/The Simplex Method
We can solve two variables$(x_2,s_2)$ LP models easily using the graphical method outlined in the previous section but what should we do in case of three variable problems, i.e. when our company
makes three products we have to make decisions about. What about four or five variable... | 5 | [
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Need Help with Trig Integrals
October 7th 2009, 08:27 PM #1
Newbie
Joined
Sep 2009
Posts
9
Need Help with Trig Integrals
Out of a number of trig integrals I have been working on, there are a few I'm having trouble with. I have the answers for them but am unsure of how to proceed to reach that point.
... | 5 | [
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0.009460449... | 18,557 | 18557 | |
n+1 th derivative
September 30th 2008, 12:40 AM #1
Newbie
Joined
Sep 2008
Posts
3
Hi,
can someone please help me with the derivative of the following equation.
f^(n).(x) = −[(2n)!/4n.n!.(2n − 1)].{(1 − x)^1/2−n}
I kind of know the answer for this but just don't know how to get there.(need s... | 5 | [
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0.0... | 18,558 | 18558 | |
Bernoulli and Conditional Convergence
July 10th 2010, 07:33 AM #1
Newbie
Joined
Jun 2010
Posts
18
Bernoulli and Conditional Convergence
The following problem is under the Bernoulli chapter in my book and it's about conditional convergence.
A hospital obtains its flu vaccines:
40% from A
50% f... | 4 | [
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Convex Function Proof
January 27th 2011, 12:24 PM #1
Member
Joined
Mar 2010
Posts
98
Convex Function Proof
Hey all,
Let f be a positive function on (0, 1) such that $f(x) \to \infty$ as $x\to 0$. Must there exist a convex function g such that $g(x)\le f(x)$ with $g(x) \to \infty$ as $x \to 0$? Prove... | 5 | [
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How many factors does 36^2 have?
Author Message
TAGS:
How many factors does 36^2 have? [#permalink] 22 Jan 2012, 15:48
4
Thi... | 4 | [
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User:Michiexile/MATH198/Lecture 1
From HaskellWiki
< User:Michiexile | MATH198
(Difference between revisions)
← Older edit Newer edit →
Line 1: ... | 4 | [
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Inflection Point Problem; Revenue Problem
May 9th 2011, 03:25 PM #1
Newbie
Joined
May 2011
Posts
2
Inflection Point Problem; Revenue Problem
I would greatly appreciate it if I could get some feedback on these Calculus questions. Answer one or all, any help would be appreciated. THANKS!
Question:
... | 4 | [
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Looking for formula for curved distribution
December 26th 2009, 03:18 AM #1
Newbie
Joined
Dec 2009
Posts
2
Looking for formula for curved distribution
I'm not sure what category this would fall under, but I'm assuming Applied Mathematics would fit. Apologies if it's not the correct forum.
I'm trying... | 5 | [
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De.
Hello, Given is $y^{4}+4y=0$ Who can I solove this? Who can do this step by step? Greets Thanks .
By the title "DE", is this a differential equation? Does your equation mean y''''+4y=0?
Quote: Originally Posted by Bert It should it be $y^{(4)}+4y=0$ --- If, $y^{(4)}+4y=0$ The charachteristic equation is, $k^4+4=0... | 5 | [
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Maxwell's Demon revisited
Ken G
I think the basic idea can be understood if we imagine a situation where you have a bunch of coins on a floor that can shake. First you shake the coins and get, let's say, 50 heads and 50 tails. You
register which ones are which, and glue down all the heads, and shake the floor again.... | 4 | [
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Derivative Questions?
How do I solve these problems?????--to find the derivative 1. y=(x+1)^2(x^2+2x) 2. y=x/x+1
Hi there montenegro3, welcome to MHF! To differentiate this function you must employ the product rule. It states that if $y = u\times v \Rightarrow y' = vu'+uv'$ in your case make $u = (x+1)^2$ and
$v = x^2... | 5 | [
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On the Angular Density of Three Dimensional Scattering Resonances
ISRN Mathematical Physics
Volume 2014 (2014), Article ID 460741, 5 pages
http://dx.doi.org/10.1155/2014/460741
Research Article
On the Angular Density of Three Dimensional Scattering Resonances
Department of Mathematics, National Chung Cheng Universit... | 4 | [
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Solving Log
October 21st 2011, 03:28 PM
brian890
Solving Log
Given that log2=r, and log3=s, express the following in terms of r and s.
log18 and log15
I think I did the first one right, but I'm not sure
=log(3x3x2)
=log3+log3+log2
=s+s+r
=2s+r
But I'm not sure how to do the second o... | 4 | [
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Patent US6292817 - Discrete cosine transformation circuit
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a discrete cosine transform circuit which can be used in compression/extension processing of digital voice data in a digital voice recording and reproduction devices.
2. De... | 4 | [
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Patent US7006564 - Adaptive equalizer
TECHNICAL FIELD
This invention relates to an adaptive equalizer for data communications.
BACKGROUND
Information may be transmitted from a transmitter to a receiver over a communication channel, such as a satellite link, a fiber optic cable, or a copper cable. The information may... | 4 | [
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Approximation Error and Tough Integral
February 19th 2013, 08:12 PM
EliteAndoy
Approximation Error and Tough Integral
Hello Everyone! Today We are asked to find $\int_{1}^{2} e^\frac{1}{x}dx$. We are given two option. First is by evaluating the definite integral itself or we can do numerical approximation using
... | 5 | [
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[Haskell-cafe] assistance with using haskell to calculate the
determinant
[Haskell-cafe] assistance with using haskell to calculate the determinant
Henning Thielemann lemming at henning-thielemann.de
Tue Mar 29 06:54:46 EST 2005
On Sun, 27 Mar 2005, Carter Tazio Schonwald wrote:
> I've written a simple program to c... | 4 | [
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Mass distribution and gravitational field
Newton's law of gravity in its familiar form gives the gravitational force between two point mass objects (or two uniform spheres which act as point objects). However, it can be cast in a form that
handles non-spherical masses. Just treat a non-spherical mass as a collection of... | 4 | [
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Too easy?
November 2nd 2007, 01:43 PM
Rocher
Too easy?
Please help me on these ones guys. I'm not as smart as you! :P
Simplify the following expressions and express the result with positive indices. All letters given represent non-zero numbers.
1. $b^ {-\frac{2}{3}}$
2. $c^{-1\frac{1}{4}}$
3. $... | 4 | [
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Physics Forums - Finding point where slope of line equals curve
fran1942 Mar29-12 04:35 PM
finding point where slope of line equals curve
1 Attachment(s)
1. The problem statement, all variables and given/known data
At what point on the curve y=2(x-cosx) is the tangent parallel to the line 3x-y=5.
3. The attem... | 5 | [
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Ultraviolet Catastrophe
gsingh2011
OK, so pretty much Planck's equation only worked when energy was quantized. And the original problem was that scientists believed that the higher the frequency went the more energy it had (according
to their equations), which wasn't the case. So did there equations also say that bl... | 4 | [
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log rule for integration confusion
July 15th 2011, 08:17 AM #1
Member
Joined
Oct 2009
Posts
195
Thanks
1
log rule for integration confusion
If I have a function:
f(x) = 1 / (x+1), and I want to find it's indefinite integral, I can apply the log rule and get:
F(x) = ln |x+1| + C
If, how... | 4 | [
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... | 18,578 | 18578 | |
sequence of functions
November 15th 2011, 06:26 PM #1
Newbie
Joined
Oct 2011
Posts
23
sequence of functions
**Problem:**
prove that the sequence of functions $\left \{ f_{n} \right \}$ defined by:
$f_{n}\left ( x \right )= n\sin\sqrt{4\pi ^{2}n^{2}+x^{2}}$ converges uniformly on $\left [ 0,\alph... | 5 | [
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Difficulty Calculating the Principal Unit Normal Vector.
October 20th 2011, 06:47 PM #1
Junior Member
Joined
Apr 2011
Posts
43
Difficulty Calculating the Principal Unit Normal Vector.
Hi,
I am having difficulties find the principal unit normal vector N(t) for the vector function
$\\r(t)=(t,4-t^... | 5 | [
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Components of Christoffel symbol
latentcorpse
[itex]\Gamma^2{}_{12}=r^3[/itex]
[itex]\Gamma^2{}_{21}=r^3[/itex]
[itex]\Gamma^2{}_{33}=-\frac{1}{2}r^4 \sin{2 \theta}[/itex]
You seem to be missing a factor of [itex]1/r^4[/itex]
[itex]\Gamma^3{}_{13}=r^3 \sin^4{\theta}[/itex]
[itex]\Gamma^3{}_{23}=r^4 \sin^3{\theta} ... | 4 | [
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0.050048... | 18,581 | 18581 | |
Balloon's growth speed
November 16th 2009, 02:32 PM #1
Junior Member
Joined
Nov 2009
Posts
29
Balloon's growth speed
Need help with this task =/
Dad is blowing up a balloon for his son so that the volume of the balloon is growing 1 litre per second. How fast is the ball growing, when
a) the ball... | 4 | [
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... | 18,582 | 18582 | |
Circular or spherical data, and density estimation
March 17, 2011
By arthur charpentier
I few years ago, while I was working on kernel based density estimation on compact support distribution (like copulas) I went through a series of papers on circular distributions. By that time, I
thought it was something for math... | 4 | [
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vector question 3
October 24th 2009, 09:27 AM #1
Newbie
Joined
Oct 2009
Posts
22
vector question 3
Show that if vectors a, b, c and d lie in the same plane, then (a´ b)´ (c ´ d) = 0.
Hello, daphnewoon!
I have an "eyeball" proof . . .
Show that if vectors $\vec{a}, \vec{b}, \vec{c},\vec{d}$... | 5 | [
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... | 18,584 | 18584 | |
Proof of L^2 Norm Property
August 9th 2010, 06:07 PM
ragnar
Proof of L^2 Norm Property
I am trying to prove that, if $\displaystyle \lim_{n \rightarrow \infty}||f_{n} - f|| = 0$ and $\lim_{n \rightarrow \infty} f_{n}(x) = g(x)$ almost everywhere on the I, for all functions in L^2
(I), then $f(x) = g(x)$ almo... | 4 | [
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Tensor Operators
previous home next PDF
Tensor Operators
Michael Fowler, 1/13/08
Introduction: Cartesian Vectors and Tensors
Physics is full of vectors: [] and so on. Classically, a (three-dimensional) vector is defined by its properties under rotation: the three components corresponding to the Cartesian x, y,... | 4 | [
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Matrix division/inverse problem
Edmonton’s mayor is getting nervous about the upcoming municipal elections and wants to send a private message to his counsellors. One of his interns is taking linear algebra and helps him set up
a matrix 𝑀 where each letter in the message is replaced by the number of its positi... | 5 | [
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... | 18,587 | 18587 | |
S^1 (the circle) is not homeomorphic to any interval of the the real line.
October 20th 2011, 12:26 PM #1
Member
Joined
Feb 2011
Posts
83
Thanks
2
S^1 (the circle) is not homeomorphic to any interval of the the real line.
I can sort of see how this works.
We can wrap the interval around itself t... | 5 | [
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Forces Concerning a Rectangular Prism
haruspex
I feel it will become clearer if you just go ahead and develop the usual equations.
Alright.
The torque due to the component of gravity perpendicular to the radius is [itex]mgL\sin{θ}[/itex]. Since [itex]\sin{θ}=\frac{w}{\sqrt{w^2+h^2}}[/itex] and [itex]L=\frac{\sqrt{... | 5 | [
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0.0... | 18,589 | 18589 | |
Turning point
Dear Sir, I would be most grateful if some friends can help to solve the attached question. Thanks
Hello, kingman! I'm coming up with a strange result . . . Quote: A curve has the equation: . $y \:=\:\dfrac{2x^2+px+2}{x+1}$ where $p$ is a constant. By considering $\dfrac{dy}{dx}$ . . . . I don't
see how ... | 4 | [
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Determine ON-base of the column space of matrix
November 1st 2010, 07:56 AM
maria88
Determine ON-base of the column space of matrix
1 3 1 2 2
-2 1 3 3 -2
1 2 1 1 1
1 2 2 1 0
3 1 2 -2 -1
Gauss elimination gives me the pivot positions in colonn number 1,2 and 3.
I think i have to use a no... | 5 | [
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Math Help
December 2nd 2010, 01:57 AM #1
Senior Member
Joined
Dec 2008
Posts
288
test
we have $\displaystyle\lim_{x\to\infty} ( \frac{16x}{16x+5})^{9x}$
re-writing this as $\displaystyle\lim_{x\to\infty}exp^[\ln(( \frac{16x}{16x+5})^{9x})]$
$\displaystyle\lim_{x\to\infty}exp^{9x}[\ln\( \frac{1... | 5 | [
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Radicals
Introduction
Equations involving radicals abound in the various fields of engineering. Students of engineering must therefore gain confidence and competence in solving equations that include radical expressions.
In this module, several different applications that involve the use of radicals to solve engineeri... | 4 | [
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Risk Maps for the Spread of Highly Pathogenic Avian Influenza in Poultry
Abstract
Devastating epidemics of highly contagious animal diseases such as avian influenza, classical swine fever, and foot-and-mouth disease underline the need for improved understanding of the factors
promoting the spread of these pathogens. H... | 4 | [
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Express Integral as a Riemann Sum and solve
June 13th 2009, 06:56 AM
Robb
Express Integral as a Riemann Sum and solve
Hello MHF,
I have been able to process this question a little bit, but got a bit stuck when i got to a certain point..
Express the integral as a limit of sums;
$\int_{0}^{\pi}\sin5x ... | 5 | [
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simplifying expressions
September 29th 2007, 05:39 AM #1
Newbie
Joined
Sep 2007
Posts
9
simplifying expressions
can someone please help me simplify these three expressions if possible
...and if possible please show working out so i can understand better thanks
(a) (x+1)^3 -3x (x+1)
(b) y(2y... | 4 | [
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Questions about semiconductors
Question 1:
1. The problem statement, all variables and given/known data
If E[f]=E[v] find the probability of a state being empty at E=E[v]-KT
F(E)=1 Divided by 1+(exp(E-E[f])/KT)
k=8.62*10^-5 eV/k
2. Relevant equations
3. The attempt at a solution
when i used this equation to find the ... | 5 | [
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Comparison of the Finite Volume and Lattice Boltzmann Methods for Solving Natural Convection Heat Transfer Problems inside Cavities and Enclosures
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 762184, 15 pages
http://dx.doi.org/10.1155/2014/762184
Research Article
Comparison of the Finite Volume and La... | 4 | [
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Today's calculation of integral #8
let $a_n = \frac {n^n}{n!}$ and note that the root test will give the same result as the ratio test. that is, we will use the fact that: $\lim |a_n|^{1/n} = \lim \left| \frac {a_{n + 1}}{a_n} \right|
$ Now compute $\lim \left| \frac {a_{n + 1}}{a_n} \right|$ if i did not make a mistak... | 5 | [
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