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A few pre calc questions! help appreciated
December 13th 2008, 08:28 PM #1
Junior Member
Joined
Dec 2008
Posts
31
A few pre calc questions! help appreciated
f(x) = 3x^2-5 and g(x) = 2/x. find the function of f(g(x)) and give the domain.
Solve equation with exact answers: -x^2-3x+10 = 0
f(x) = l... | 4 | [
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... | 31,500 | 31500 | |
Binary Recurrence Sequences.
sage: R = BinaryRecurrenceSequence(1,1) #the Fibonacci sequence
sage: R(137) #the 137th term of the Fibonacci sequence
19134702400093278081449423917
sage: R(137) == fibonacci(137)
True
sage: [R(i) % 4 for i in xrange(12)]
[0, 1, 1, 2, 3, 1, 0, 1, 1, 2, 3, 1]
sage: R.period(4) ... | 5 | [
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... | 31,501 | 31501 | |
-Vector Equilibrium Problems
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 509404, 4 pages
http://dx.doi.org/10.1155/2014/509404
Research Article
Optimality Conditions for ε-Vector Equilibrium Problems
^1School of Economics and Business Administration, Chongqing University, Chongqing 400030, China
^2R... | 5 | [
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Homework Help
Posted by anonymous on Thursday, October 28, 2010 at 11:02pm.
why does ln(1/x)= -1/x ?
• Calculus - jai, Thursday, October 28, 2010 at 11:05pm
is that the derivative? if it is,
ln(1/x) can be written as:
ln (x^-1) = -ln(x)
since the derivative of ln (x) is 1/x, then
derivative of ... | 4 | [
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tes
Introduction
This page includes simple formula for the calculation of the maximum stress and deflection for thin flat plates under a variety of support and loading conditons. The equations are only valid if the
deflection is small compared to the plate thickness. The plates are all assumed to be steel with a poiss... | 4 | [
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analysis of a proof
1. November 20th 2009, 03:26 PM #16
2. November 20th 2009, 04:06 PM #17
I think considering this is the university help section, it is fair to say this proof is not complicated. It just relies on the properties of the real numbers.
$x\leq |x|$ follows from the fact that the r... | 4 | [
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Need Help Using Complex Exponentials To Solve Differential Equation
October 28th 2007, 08:01 AM #1
Newbie
Joined
Sep 2007
Posts
3
Need Help Using Complex Exponentials To Solve Differential Equation
Hi,
Can someone help me with the following?
Use complex exponentials to find the solution of the ... | 4 | [
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... | 31,506 | 31506 | |
differential equation problem
March 20th 2009, 04:25 AM
swimmergirl
differential equation problem
I almost have the answer but I can't quite get there.
Differential equation is
dH/dt= (40-H)^2/100
I solved it through here:
H= 40 - 200/(2t + 5)
However, when I plug in a value t=5 I get the... | 5 | [
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TI-89 zeros, vertex and discriminant?
How do I solve zeros, vertex and discriminant? For the quadratic equations. I have a TI-89 Titanium. Y1=(x-4)^2-2 y2=x^2-2x-3
Hello, 1. I assume that you have entered the term at y1 and y2 in the (Y=)-editor. to y1: The equation of this parabola is in vertex form and you can get t... | 4 | [
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Determine Equation For Polynomial Function shown by Graph
September 16th 2013, 07:08 AM #1
Junior Member
Joined
Oct 2011
Posts
62
Thanks
2
Determine an equation in factored form for the polynomial represented by the graph.
Graph #1: Image - TinyPic - Free Image Hosting, Photo Sharing & Video Host... | 4 | [
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0.038818359375,
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Proof that sum^infty of 1/n^2 = ...
August 7th 2010, 11:34 AM #1
Member
Joined
Jun 2010
Posts
205
Thanks
1
Proof that sum^infty of 1/n^2 = ...
I am trying to prove $\frac{x^{2}}{2} = \pi x - \frac{\pi^{2}}{3} + 2\displaystyle \sum^{\infty}_{n = 1} \frac{cos(nx)}{n^{2}} for 0 \leq x \leq 2 \pi$. I've ... | 5 | [
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0... | 31,510 | 31510 | |
Calculus: Chain Rules and Implicit Differentiation
May 21st 2007, 03:35 PM #1
Newbie
Joined
May 2007
Posts
10
Calculus: Chain Rules and Implicit Differentiation
I've actually already done the first 2 problems I'm posting, but I'd like to see how someone else works them out because I'm not sure about my w... | 5 | [
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Math Help
March 15th 2010, 05:10 AM #1
Connectedness
Prove that any infinte set with co-finite topology is connected.
Does this question even make sense?
Let $(X,T)$ be an infinite space with co-finite topology.
Let $(U,V)$ be a two point discrete space where $U=\{0,1\}$.
Let $f: X \rightarrow... | 4 | [
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-... | 31,512 | 31512 | |
Straight forward ODE
February 5th 2011, 03:13 PM
VonNemo19
Straight forward ODE
Hi again. Here's one.
(a) Without solving, explain why the intitial value problem
$\frac{dy}{dx}=\sqrt{y},$$y(x_0)=y_0$
has no solution for $y_0<0$.
(b) Solve the initial value problem in part (a) for $y_0>0$ and ... | 5 | [
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Help Evaluating Algebraic Problem
September 22nd 2010, 06:19 AM #1
Junior Member
Joined
Sep 2010
Posts
68
Help Evaluating Algebraic Problem
Express x in terms of y for the expression:
$\frac {x-2y}{3}=\frac{y-2x}{2}$
and hence evaluate:
$\frac {7x-2y}{3x+y}$
So i express x in terms of... | 4 | [
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differencial equations
May 18th 2007, 12:16 PM #1
Junior Member
Joined
Mar 2007
Posts
63
differencial equations
1.A fruit fly population of 182 flies is in a closed container. The number of flies grows exponentially, reaching 340 in 18 days. Find the doubling time (time for the population to double) to t... | 5 | [
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Homework Help
Posted by Mickey on Friday, March 12, 2010 at 8:58pm.
If $1,000.00 is deposited into an account paying 3% interest compounded annually (at the end of each year), how much money is in the account after 5 years? (Round to the nearest cent.) I cannot
remeber the formula for this problem can you help
• ma... | 4 | [
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If y= log {x + (1 = x^2)^1/2} what is dy/dx?
September 28th 2007, 11:46 PM #1
Newbie
Joined
Sep 2007
Posts
5
If y= log {x + (1 + x^2)^1/2} what is dy/dx?
I hope someone can help me with this problem:
If y= log {x + (1 + x^2)^1/2} what is dy/dx?
apprantly the answer is dy/dx = (1 + x^2)^-1/2 , b... | 5 | [
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Solution of Nonlinear Elliptic Boundary Value Problems
and Its Iterative Construction
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 210325, 14 pages
http://dx.doi.org/10.1155/2012/210325
Research Article
Solution of Nonlinear Elliptic Boundary Value Problems and Its Iterative Construction
^1School of... | 5 | [
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... | 31,518 | 31518 | |
Showing the closest point in a set to a point outside the set is orthogonal to
October 1st 2008, 12:05 PM #1
Newbie
Joined
Sep 2008
Posts
7
Showing the closest point in a set to a point outside the set is orthogonal to
Hi everyone,
I have a bit of an algebra/convexity type problem. I've been asked t... | 5 | [
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Derivative With Natural Logs
February 17th 2010, 02:46 PM #1
Junior Member
Joined
Dec 2009
Posts
46
Derivative With Natural Logs
$(1+\ln x)^7$
I would have to use the general power rule rather than log properites correct . so the answer should be.
$\frac{7}{x} (1 + \ln x)^6$
You must use t... | 5 | [
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Homework Help
Posted by Erica on Tuesday, October 18, 2011 at 9:08pm.
Use either substitution or integration by parts to evaluate the integral:
∫(x+2)/(x²+2) dx
Thank you!!
• Calculus - Steve, Wednesday, October 19, 2011 at 5:44am
If x = √2 tan t,
x^2 = 2tan^2t
x^2 + 2 = 2sec^2t
dx = √2 sec^2t
... | 5 | [
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Homework Help
Posted by Kay on Thursday, June 23, 2011 at 8:25pm.
Can you help me with this? I did this many times and got different answers each time.
Find f.
f ''(x) = 3e^x + 3sin(x)
f(0) = 0
f(π) = 0
My work:
f ''(x) = 3e^x + 3sin(t)
f'(x) = 3e^x - 3cos(t) + C
f(x) = 3e^x -3sin(t) + Cx + D
0=f(0)= 3e^0 - 3... | 5 | [
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[SOLVED] Miscellaneous 6 OCR
November 26th 2007, 07:55 AM #1
james singh jagjit
Guest
Hi everyone, I am new in this forum
Find the value of k for the following equation which has 2 real roots
Kx^2 + kx + 2 = 0
Now I have found that: b^2 -4ac
k^2 - 4*k*2> 0
K^2 -8k > 0
I do not understan... | 4 | [
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Common Fixed Point Results for Four Mappings on Partial Metric Spaces
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 190862, 11 pages
http://dx.doi.org/10.1155/2012/190862
Research Article
Common Fixed Point Results for Four Mappings on Partial Metric Spaces
^1Faculty of Science and Arts, University of... | 5 | [
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Y' = ay-b*y^2-c*y*x; x'=d*y^2
Hi. I've compared Jacquelin's method against the numerical results although I avoided a value that would give X=0 since we're taking logs below. So I let:
[tex]a=1[/tex]
[tex]b=1[/tex]
[tex]c=2[/tex]
[tex]d=1[/tex]
[tex]x_0=1[/tex]
[tex]y_0=2[/tex]
I believe there is a mistake in th... | 5 | [
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MATHS CBSE class 9th Chapter 4 - Linear Equations in two variable
MATHS CBSE IX Chapter 4 -Exercise 4 :1 Linear Equations in two - Answer of question on Page 68 Answer Q1. Q2.
Question 1:
The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement.
(Take t... | 4 | [
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0.043701171875,
0.02294921875,
-0.01226806640625,
-0.1083984375,
-0.040... | 31,526 | 31526 | |
help with PDE
February 6th 2009, 04:00 PM #1
Member
Joined
Nov 2006
Posts
142
help with PDE
Can someone help me with this, it's slightly different from other separable equation PDE's I've done before:
Consider a thin rectangular plate (0 <= x <= pi, 0 <= y <= pi/2) with the following steady-state te... | 5 | [
-0.03759765625,
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-0.021484375,
-0.... | 31,527 | 31527 | |
Complex integration
September 19th 2009, 04:23 AM #1
Complex integration
Hey guys, quick question. How would I go about showing that this following equation:
$\int_{|z|=3}^{}tan(z).dz$
equals $-4\Pi i$
...I've tried breaking it down to $sin(z) / cos(z)$, then finding the residues using the singular... | 5 | [
0.002410888671875,
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0.045166015625,
0.044677734375,
-0.06494140625,
0.0498046875,
-0.00607299... | 31,528 | 31528 | |
Cardinality
December 7th 2010, 09:00 AM
worc3247
Cardinality
I'm stuck on this question:
Let A={1,2,3....,n}. What is the cardinality of the set:
{(a,S) : a $\in$S, S $\in$P(A)}.
I feel like its going to be related to 2^n, but i'm not sure. Could someone point me in the right direction?
December 7t... | 4 | [
-0.005035400390625,
-0.005767822265625,
-0.01226806640625,
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0.044677734375,
-0.068359375,
0.01373291015625,
-0.0185546875,
-0.0041198730... | 31,529 | 31529 | |
Producing permutations, part five
Last time on FAIC I showed how you could produce the mth permutation of n elements, where m is a number between zero and n!-1 that chooses from the n! possible permutations. There’s a very
interesting way to represent numbers that are always less than n! for a given n that I thought I... | 4 | [
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0.1108... | 31,530 | 31530 | |
Help setting integral limits for P(X1 <X3 -X2)
July 4th 2012, 11:35 PM #1
Member
Joined
Mar 2008
Posts
93
Thanks
1
Help setting integral limits for P(X1 <X3 -X2)
Let (X1 ,X2, X3) be i.i.d. r.v.'s with common probability density function
f(x)= e^(-x), 0 <x and 0 otherwise
Find P(X1 <X3 -X2)
... | 4 | [
0.007476806640625,
-0.01092529296875,
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0.0225830078125,
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0.00823974609375,
0.1064453125,
-0.05029296875,
0.0361328125,
-0.0... | 31,531 | 31531 | |
Basic Electronics and Robotics Training Course: Part 2
Resistances in Parallel
When resistors are placed in parallel, they behave differently than they do when they are in series. So, if you have a resistor of a certain value and you place other resistors in parallel with it,
the overall resistance will decrease inste... | 4 | [
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-0.05908203125,
0.078125,
-0... | 31,532 | 31532 | |
Circle in Triangle
October 27th 2009, 11:08 AM #1
Member
Joined
Apr 2009
Posts
190
Circle in Triangle
Hi I have attached the question as a word file. I have worked through it, and need help with the last bit.
I do not understand how to show the relationship between A and B in ii)
he first time ... | 4 | [
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0.140625,
-0.0888671875,
-0.0698... | 31,533 | 31533 | |
Homework Help
Posted by lee on Sunday, November 18, 2012 at 10:19am.
what are the real or imaginary solutios of the polynomial equation
x^3-8=0
I came up with 1+i sgrt 3 and 1-i sgrt 3
could some see if I'm right
• algebra - Bosnian, Sunday, November 18, 2012 at 12:33pm
First byou must find real solution.
... | 4 | [
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... | 31,534 | 31534 | |
A Note on Closed-Form Representation of Fibonacci Numbers Using Fibonacci Trees
ISRN Discrete Mathematics
Volume 2014 (2014), Article ID 132925, 3 pages
http://dx.doi.org/10.1155/2014/132925
Research Article
A Note on Closed-Form Representation of Fibonacci Numbers Using Fibonacci Trees
School of Information Technol... | 5 | [
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0... | 31,535 | 31535 | |
Group Homomorphism
October 26th 2012, 11:10 PM #1
Junior Member
Joined
Sep 2012
From
Singapore
Posts
32
Group Homomorphism
Hi anyone knows how to solve this? My answer was 3. Is it correct?
Question:
If f:S[3]-> Z[2 ]given by
f(a) = 1 if a is a 2-cycle
f(a) = 0 otherwise is a group h... | 5 | [
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MathGroup Archive: March 2003 [00641]
[Date Index] [Thread Index] [Author Index]
Re: Need a nice way to do the "left count"
• To: mathgroup at smc.vnet.net
• Subject: [mg40302] Re: Need a nice way to do the "left count"
• From: Selwyn... | 4 | [
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Latin American applied research
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versión impresa ISSN 0327-0793
Lat. Am. appl. res. vol.41 no.1 Bahía Blanca ene. 2011
... | 4 | [
0.044677734375,
-0.038818359375,
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0.105468... | 31,538 | 31538 | |
el
Sort by:
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Now showing results 1-10 of 17
This collection of 103 individual sets of math problems derives from images and data generated by NASA remote sensing technology. Whether used as a challenge activity, enrichment activity and/or a
formative assessment, the problems allow students to... (View More)... | 4 | [
0.0101318359375,
0.0361328125,
0.05517578125,
-0.01080322265625,
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0.03515625,
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0.087890625,
0.0262451171875,
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0.040283203125,
-0.037109375,
0.0234... | 31,539 | 31539 | |
Homework Help
Posted by Daniel on Thursday, December 4, 2008 at 6:45pm.
Find the solution subject to the initial conditions.
dP/dt = -2P P(0)=1
dP/-2P = dt
then do i take the antiderivative? what would i do next??
• Calculus - drwls, Thursday, December 4, 2008 at 6:51pm
Yes.
ln P = -2 t + C
P = e^(-... | 5 | [
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0.00194549560546875,
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-0.00885009765625,
-0.03271484375,
-0... | 31,540 | 31540 | |
Trig identities
June 5th 2010, 05:19 AM #1
Member
Joined
Mar 2010
Posts
78
Trig identities
14. a) Which equations are not identities? Justify your answers.
b) For those equations that are identities, state any restrictions on the variables.
i) $(1 - cos^2x)(1 - tan^2x) = \frac{sin^2x - 2sin^4x}{... | 4 | [
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0.034912109375,
0.0157470703125,
-0.039306640625,
-0.00933837890625,
-0.0154418945312... | 31,541 | 31541 | |
-Dimensional Sawada-Kotera Equation
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 767254, 5 pages
http://dx.doi.org/10.1155/2013/767254
Research Article
The Multisoliton Solutions for the -Dimensional Sawada-Kotera Equation
^1Applied Technology College, Southwest University of Science and Technology, ... | 5 | [
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-0.12060546875... | 31,542 | 31542 | |
Practical data mining of vague and uncertain data
Databases are developed to store data, but more important is the ability to query the data after it has been stored. Database management systems, such as those based around relational models (that
is, Structured Query Language (SQL)-based), document models (such as Mong... | 4 | [
0.039794921875,
0.01055908203125,
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0.078125,
0.0306396484375,
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0.0189208984375,
0.0167236328125,
0.... | 31,543 | 31543 | |
symmetric transpose matrix
November 19th 2009, 06:07 PM
ecc5
symmetric transpose matrix
I am stuck on this problem. Let A be an arbitrary mxn matrix. Show that A transpose times A is symmetric. My teacher has been doing proofs using i and j to denote entries of the matrix, so if you
could use that notation w... | 4 | [
-0.10498046875,
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0.004852294921875,
-0.01519775390625,
0.10400390625,
0.035400390625,
0.087... | 31,544 | 31544 | |
Perfect Numbers
January 24th 2009, 02:31 AM #1
Newbie
Joined
Jan 2009
From
Italy
Posts
1
Hi, I'm new here and so I first want to say "Hi, everybody"!!
I've got a little problem with Euclid's method to find perfect numbers.
The question is, how to prove that any number like p^n, where p is a pr... | 5 | [
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-0.06396484375,
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-0.0235595703125,
0.009765625,
0.... | 31,545 | 31545 | |
Evaluate the definite integral of the algebraic function
December 3rd 2012, 06:51 AM #1
Senior Member
Joined
Nov 2012
From
Hawaii
Posts
260
Thanks
2
Evaluate the definite integral of the algebraic function
If you integrate the square root of 2/x does it come out to just 2x because when i rewrite ... | 5 | [
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-0.0164794921875,
-0.031982421875... | 31,546 | 31546 | |
Proof by contradiction.
October 5th 2011, 07:52 PM
Aquameatwad
Proof by contradiction.
Someone PLEASE help me!
I'm trying to write a contradiction to the statement:
If three positive real numbers x,y,z are chose between 0 and 1 with 0<x<y<z<1, then the distance from x to y is less than .5 or the distance... | 4 | [
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-0.0339355... | 31,547 | 31547 | |
Kadomtsev-Petviashvili equation
From Scholarpedia
Gino Biondini and Dmitry Pelinovsky (2008), Scholarpedia, 3(10):6539. doi:10.4249/scholarpedia.6539 revision #91398 [link to/cite this article]
The Kadomtsev-Petviashvili equation (or simply the KP equation) is a nonlinear partial differential equation in two spatia... | 4 | [
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-0.024291992... | 31,548 | 31548 | |
Formula of a summation
April 19th 2009, 08:42 PM #1
Junior Member
Joined
Feb 2009
Posts
57
Formula of a summation
Hi all... I am having alot of trouble finding a guide on how to solve this. I have been told that I can compute the first few terms to get the formula but have no idea where to start. Thanks ... | 4 | [
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0.09912109375,... | 31,549 | 31549 | |
AIME I Question
The number $\sqrt{104\sqrt{6}+468\sqrt{10}+144\sqrt{15}+2006}$ can be written as $a\sqrt{2}+b\sqrt{3}+c\sqrt{5}$, where a,b, and c are positive integers. Find a*b*c. Any hints?
Quote: Originally Posted by Jameson $104\sqrt{6}+468\sqrt{10}+144\sqrt{15}+2006=(a\sqrt {2}+b\sqrt{3}+c\sqrt{5})^2$ Open paran... | 5 | [
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0.0126... | 31,550 | 31550 | |
Graph theory proof
May 6th 2010, 05:27 AM #1
Newbie
Joined
Oct 2008
Posts
6
Graph theory proof
I just received an assignment back and was told that my proof to the following was not valid; I'm not sure why. Would appreciate if someone could point out my errors.
Prove that if G is a graph with no cyc... | 4 | [
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... | 31,551 | 31551 | |
Logarithms
October 12th 2010, 07:29 AM
rtblue
Logarithms
Hello everyone, I had a question about a problem involving some logs:
$5log_32+2log_910=?$
I'm not quite sure where to start with this problem, any suggestions would be appreciated.
October 12th 2010, 07:36 AM
TheEmptySet
Quote:
A go... | 4 | [
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... | 31,552 | 31552 | |
ew
Quote:
Ahh, k so basically an i/o board that is easily integrated with a pc. Most controllers I have seen are PID. Sounds like you've got lots of work ahead hehe (fun project btw).
Shouldn't take long at all.
I just ordered the McMasterCarr parts, btw.
Quote:
The step response is probably a good place to begin,... | 4 | [
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On Energy Conditions for Electromagnetic Diffraction by Apertures
ISRN Mathematical Physics
Volume 2012 (2012), Article ID 983809, 25 pages
http://dx.doi.org/10.5402/2012/983809
Research Article
On Energy Conditions for Electromagnetic Diffraction by Apertures
^1Beuth Hochschule für Technik Berlin, Fachbereich II-Ma... | 4 | [
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0.049072265625,
0.0186767578125,
0.040283203125,
-0.002227783203125,
-0.0174560546875,
0.0126953125,
0.021240234375,
0.00872802734375,
-0.052978515625,
-0.046630859375,
-0.0869140625... | 31,554 | 31554 | |
Numbers that are comprised of all 1's in binary expansion
July 3rd 2010, 09:01 PM #1
Newbie
Joined
Jun 2010
Posts
8
Numbers that are comprised of all 1's in binary expansion
I have to find a number that is made of 1's only (i.e. 111, 1111, 1111111, not 1010, 11101, 1101010, etc) that is a multiple of 17.... | 5 | [
0.0025634765625,
0.04296875,
0.0198974609375,
-0.052490234375,
0.080078125,
-0.07861328125,
0.0361328125,
0.0211181640625,
-0.10205078125,
0.020263671875,
-0.080078125,
-0.056884765625,
0.0556640625,
0.0390625,
-0.044921875,
-0.008544921875,
-0.02734375,
0.00347900390625,
0.06396... | 31,555 | 31555 | |
Coupled difference equations - Change of coordinates problem
September 10th 2009, 03:25 AM #1
Coupled difference equations - Change of coordinates problem
The setup is:
Consider the coupled system of difference equations generated by a Leslie model with $b_{1}=1, b_{2}=4, d_{1}=0.5$
$x_{n+1}=x_{n}+4y_{n... | 5 | [
-0.11279296875,
-0.007232666015625,
0.041015625,
-0.040771484375,
-0.01275634765625,
0.00555419921875,
-0.021728515625,
-0.01275634765625,
0.050537109375,
-0.01519775390625,
0.041015625,
-0.035400390625,
-0.033935546875,
-0.06591796875,
-0.014892578125,
0.11279296875,
-0.036376953125... | 31,556 | 31556 | |
questions in physics
January 4th 2011, 07:59 AM
r-soy
questions in physics
questions :
1 ) A person notices a mild shock if the current along a path through the thumb and index finger exceeds 78 ľA.?
Compare the maximum possible voltage without shock across the thumb and index finger with a dry-skin res... | 4 | [
-0.0279541015625,
0.044189453125,
0.039306640625,
-0.0010528564453125,
0.056640625,
-0.021484375,
0.06591796875,
0.10986328125,
-0.0947265625,
0.0400390625,
0.087890625,
-0.05810546875,
0.040771484375,
0.1611328125,
-0.00189971923828125,
-0.0159912109375,
-0.0198974609375,
0.043457... | 31,557 | 31557 | |
Physics: Motion problem
No Calculus allowed. I need some help. I'm really stuck... Thank You.
no calculus, huh? since $\Delta y = 0$ $0 = v_{yo}t - \frac{1}{2}gt^2$ $0 = t\left(v_{yo} - \frac{1}{2}gt\right)$ $v_{yo} = \frac{1}{2}gt$ $t = \frac{2v_{yo}}{g} = \frac{2v_o\sin{\theta}}{g}$ $\Delta
x = v_x \cdot t$ $\Delta ... | 4 | [
-0.000946044921875,
0.0216064453125,
0.03515625,
-0.06201171875,
0.00567626953125,
-0.04931640625,
-0.060546875,
0.03173828125,
-0.00726318359375,
0.02001953125,
0.068359375,
0.01019287109375,
-0.07958984375,
0.006378173828125,
0.0341796875,
0.06396484375,
0.01007080078125,
0.05346... | 31,558 | 31558 | |
Function homework help
September 27th 2012, 01:40 PM #1
Newbie
Joined
Sep 2012
From
Ny
Posts
17
Function homework help
Let f be the function given by f(x)= 2x/sqrt(x^2 + x + 1)
A) find the domain and justify
B) write an equation for each horizontal asymptote
C) does the graph cross any ho... | 4 | [
-0.03466796875,
-0.0155029296875,
0.004638671875,
-0.005035400390625,
0.0185546875,
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0.036376953125,
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0.0771484375,
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0.02734375,
0.06103515625,
-0.0031890869140625,
0.037109375,
-0.00787353515625,
-0.0463... | 31,559 | 31559 | |
a body is coasting to a stop and the only force acting on it is a resistance
March 26th 2010, 04:27 PM #1
Senior Member
Joined
Apr 2009
Posts
253
a body is coasting to a stop and the only force acting on it is a resistance
A body is coasting to a stop and the only force acting on it is a resistance propo... | 5 | [
-0.03564453125,
0.02294921875,
0.04296875,
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0.0172119140625,
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0.09912109375,
0.06591796875,
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0.04931640625,
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0.029296875,
0.06640625,
0.03564453125,
-0.059082... | 31,560 | 31560 | |
equations of lines
February 21st 2007, 07:27 AM #1
Newbie
Joined
Oct 2006
Posts
12
equations of lines
Write the slope of a line that is parellel to each line
y=2x - 5
3x+y = 10
Write an Equation for the line containing the point (6,-2)
Parrell to the line 2x + y = 5
If you rearrange... | 4 | [
-0.1728515625,
-0.045166015625,
-0.033935546875,
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0.0255126953125,
0.083984375,
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0.08251953125,
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0.017822265625,
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-0.00007390975952148438,
0.035400390625,
-0.1708984375,
0.07324... | 31,561 | 31561 | |
Cauchy's Integral formula for Derivatives
February 17th 2011, 12:22 PM #1
Newbie
Joined
Feb 2011
Posts
2
Cauchy's Integral formula for Derivatives
Higuys, I'm having a bit of trouble showing this.
Any help is much appreciated
$\displaystyle(\frac{1}{2i\pi})\oint_{C} (\frac{e^{tz}}{z^{n+1}}) dz =... | 4 | [
-0.054443359375,
0.0966796875,
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0.00011205673217773438,
0.0234375,
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-0.043701171875,
-0.035888671875,
-0.05126953125,
-0.00704956054... | 31,562 | 31562 | |
Bifurcation Analysis in a Delayed Diffusive Leslie-Gower Model
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 170501, 11 pages
http://dx.doi.org/10.1155/2013/170501
Research Article
Bifurcation Analysis in a Delayed Diffusive Leslie-Gower Model
College of Mathematics and Information Science, ... | 5 | [
-0.0025634765625,
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0.1171875,
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-0.01116943359375,
-0.12353... | 31,563 | 31563 | |
algebra help
Solve for m and n: 2m-n=3 mē - mn+nē =3
Here is one way, by substitution. 2m -n = 3 ------(1) mē -mn +nē = 3 ---------(2) From (1), 2m -3 = n, or, n = 2m -3 Substitute that into (2) m^2 -m(2m -3) +(2m -3)^2 = 3 m^2 -(2m^2 -3m) +(4m^2 -12m
+9) = 3 m^2 -2m^2 +3m +4m^2 -12m +9 -3 = 0 Collect like terms, (m^2... | 4 | [
-0.0252685546875,
0.054443359375,
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0.0380859375,
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0.041259765625,
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0.058349609375,
-0.000843048095703125,
0.004974365234375,
0.015869140625,
-0.0402832031... | 31,564 | 31564 | |
Homework Help
Posted by jack on Tuesday, January 25, 2011 at 11:02am.
If line g passes through point (2, 2) and is perpendicular to the line h, then what is the equation of line g? With h passing through two points (1, 2) and (3, 6)
• Math - Reiny, Tuesday, January 25, 2011 at 12:09pm
slope of line through the... | 4 | [
-0.138671875,
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0.11083984375,
-0.07861328125,
-0... | 31,565 | 31565 | |
Directional Derivatives and Gradient Vectors
March 14th 2011, 07:14 AM #1
Junior Member
Joined
Feb 2011
Posts
26
Directional Derivatives and Gradient Vectors
I would appreciate any help on the following problem:
Suppose I am descending a mountain, and for every 3 meters I travel NW, I climb 1/2 a me... | 5 | [
-0.01373291015625,
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0.0283203125,
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0.0191650390625,
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0.04541015625,
0.0262451171875,
0.038818359375,
0.03125,
0.057861328125,
-0.01025390625,
0.0703125,
-0.01953125,
0.09375,
-0.00698852... | 31,566 | 31566 | |
Holomorphic extension of Dirichlet Series
April 26th 2010, 02:43 PM #16
Define $L : \{s \in \mathbb{C}| Re(s) > 0\} \rightarrow \mathbb{C}$ by $L(s) = \sum_{n=0}^\infty \frac{(-1)^n}{(2n+1)^s}$.
Note that $L(s) = \frac{1}{\Gamma(s)} \int_0^\infty \frac{t^{s-1}}{e^t+e^{-t}}dt$
Show that L can be extended... | 4 | [
-0.095703125,
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0.0133056640625,
0.09765625,
0.095703125,
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0.061767578125,
-0.0191650390625,
0.0115966796875,
0.0615234375,
0.0615234375,
0.0000286102294921875,
-0.032470703125,
-0.060791015625,
-0.0546875,
0.02099609375,
-0.06884765625,
... | 31,567 | 31567 | |
derivative of a function
December 2nd 2009, 12:00 PM #1
Newbie
Joined
Nov 2009
Posts
9
derivative of a function
$f(x) = \left\{ {\begin{array}{rl} {0,} & {x \in \mathbb{Q}} \\ {x^2 - x^4 ,} & {x otin \mathbb{Q}} \\ \end{array} } \right.$
I'm trying to find $f'(x)$. I think the function f is not cont... | 5 | [
0.037109375,
0.01080322265625,
-0.01019287109375,
0.011962890625,
-0.064453125,
0.00848388671875,
0.0260009765625,
-0.01324462890625,
0.03369140625,
-0.021240234375,
0.11376953125,
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0.033935546875,
0.11376953125,
-0.09912109375,
0.0164794921875,
-0.002716064453125,
... | 31,568 | 31568 | |
Conjecture
June 28th 2009, 11:48 AM
Bruno J.
Conjecture
I posted this on another forum a while back but nobody was able to prove or disprove this conjecture of mine. I have empirical reasons to believe that it is true.
Let $A \subset \mathbb{N}$ be an infinite subset of the positive integers. Define
$f... | 5 | [
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0.056640625,
0.006195068359375,
-0.01544189453125,
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0.028076171875,
0.00958251953125,
0.068359375,
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0.0791015625,
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0.0225830078125,
-0.0115966796875,
-0.023681640625,
-0.... | 31,569 | 31569 | |
find convergent set of the power series
find the convergent set of the power series. heres the equation for problem2: http://img297.imageshack.us/img297/6606/untitledoy2.jpg
Use the ratio test, $\frac{n+2}{n+1}\to 1$ Thus, the radius of convergence is the reciprocal of that, namely, 1. Thus, $|x|<1$ Is absolute conver... | 5 | [
-0.03955078125,
0.019287109375,
0.034912109375,
0.037353515625,
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0.044677734375,
0.032470703125,
-0.040771484375,
0.0133056640625,
-0.06201171875,
0.0186767578125,
-0.0260009765625,
-0.054443359375,
-0.06494140625,
0.032958984375,
-0... | 31,570 | 31570 | |
Microbial Growth
Chapter 2 Biofilm Growth and Development
Section 2 Biofilm Growth and Development
Page 2 Microbial Growth
Copyright © Alfred B. Cunningham, John E. Lennox, and Rockford J. Ross, Eds. 2001-2010
Microbial Growth
As discussed in the blue/green levels of this chapter microbial cells use nutrients for ... | 4 | [
-0.07421875,
-0.0301513671875,
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0.046875,
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0.0810546875,
-0.11669921875,
0.034423828125,
0.0281982421875,
0.0495605468... | 31,571 | 31571 | |
Intersection of 3 planes
September 13th 2009, 07:18 AM #1
Senior Member
Joined
Nov 2008
Posts
425
Intersection of 3 planes
Find the intersection of pi1, pi2, pi3, and describe geometrically in each case.
a) pi1: x-y+2z=7
pi2: 2x+y-z=3
pi3: x+y+z=9
b) pi1: x+y-z=3
pi2: 2x-y+z=5
p... | 5 | [
-0.0654296875,
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-0.064453125,
-0.048828125,
-0.02587890625,
0.035400390625,
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-0.0189208984375,
0.004425048828125,
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0.007598876953125,
-0.010498046875,
-0.0439453125,
-0.049560546875,
-0.042236328125,
-0.0... | 31,572 | 31572 | |
At what quantity is the total revenue maximised?
January 1st 2008, 04:51 AM #1
Newbie
Joined
Dec 2007
Posts
17
At what quantity is the total revenue maximised?
A firm has a demand function P = 32 – Q
At what quantity is the total revenue maximised?
All i think about this question is to change i... | 4 | [
0.061279296875,
0.033203125,
-0.03466796875,
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0.036376953125,
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0.076171875,
0.044189453125,
0.03125,
0.0084228515625,
0.0159912109375,
... | 31,573 | 31573 | |
Data Reduction in Low Powered Wireless Sensor Networks
1. Introduction
A Wireless sensor network (WSN) [1] is a special kind of a peer to peer network where the nodes communicate with the sink wirelessly to transmit the sensed information. In contemporary world, a WSN
utilizes different technological advancements in l... | 4 | [
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0.052978515625,
-0.007415771484375,
-0.0... | 31,574 | 31574 | |
percent increase over years
August 4th 2010, 07:24 AM
sfspitfire23
percent increase over years
Given ‘y’ is the cost of an article. If the cost of the article increases by ‘x%’ every year from 1945 to 1990, then what is the formula for its cost after 45 years?
A. x {1 + (y/100)} ^ 45
B. y {1 + (x/100)} ... | 4 | [
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0.0439453125,
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0.11279296875,
-0.11181640625,
... | 31,575 | 31575 | |
Trig Function Derivs.
February 29th 2008, 08:30 AM #1
Member
Joined
Nov 2007
Posts
112
Trig Function Derivs.
Find the derivative of the function below. Remember to use pi for π.
g(x) = sin^2(10x) - pix
alright just need to know how to do this problem.
could some one show me in steps how to g... | 5 | [
-0.06982421875,
0.04052734375,
0.02783203125,
-0.024658203125,
-0.0179443359375,
0.07373046875,
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0.0125732421875,
-0.0322265625,
0.006866455078125,
0.099609375,
0.030517578125,
0.0625,
0.0302734375,
0.048095703125,
-0.0196533203125,
0.00244140625,
0.09521484375,
-0... | 31,576 | 31576 | |
integral bessel function
July 1st 2013, 09:03 AM #1
Newbie
Joined
Apr 2008
Posts
24
integral bessel function
Dear members,
I have a problem with the summation for computing this integral.(see attached pdf file)
I downloaded it from the intenet.
My problem is shown on the pdf file.
Tha... | 4 | [
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0.047607421875,
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0.03759765625,
-0.05322265625,
... | 31,577 | 31577 | |
order t (mod p)
March 15th 2009, 08:23 AM #1
Junior Member
Joined
May 2008
Posts
55
If $a,$ a not equal to 1 has $order t (mod p)$,
show that
$a^(t-1) + a^(t-2) + .......+1=0 (mod p).$
$a^t \equiv 1 \pmod{p} \Leftrightarrow a^t - 1 \equiv 0 \pmod{p}$
Can you factorise $a^t - 1$?
Sim... | 5 | [
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0.06494140625,
0.08154296875,
-0.027587890625,
0.07373046875,
-0.02294921875,
0.045654296875,
0.04833984375,
0.00116729736328125,
0.05029296875,
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0.078125,
0.050048828125,
0.053955078125,
-0.07861328125,
-0.023193359375,
-0.0634765625,
0.0015869140... | 31,578 | 31578 | |
Trigonometric Limit
Can anyone help me out with this question; Find the limit (as x approaches 0) of $\frac{1 - \cos2x}{x^2}$.
Using the identity $cos(2x) = cos^2(x) - sin^2(x)$ $\lim_{x\to 0} \frac{1-cos(2x)}{x^2}$ $=\lim_{x\to 0} \frac{1-cos^2(x)+sin^2(x)}{x^2}$ $=\lim_{x\to 0} \frac{sin^2(x)+sin^2(x)}{x^2}$ $=2\lim... | 5 | [
0.009765625,
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0.0927734375,
0.000591278076171875,
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-0.035400390625,
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-0.0177001953125,
0.017578125,
0.0286865234375,
-0.00360107421875,
0.048583... | 31,579 | 31579 | |
Find a differentiable function with the given properties
April 15th 2009, 01:30 PM #1
Junior Member
Joined
Apr 2009
Posts
29
Find a differentiable function with the given properties
hello, need your help
find all function $f$ differentiable over $\mathbb{R}$
$- (\forall x\in \mathbb{R}) : \big(f... | 5 | [
0.0162353515625,
-0.06005859375,
0.048583984375,
0.06787109375,
-0.04345703125,
0.0135498046875,
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0.056640625,
-0.0177001953125,
0.044921875,
0.1044921875,
-0.0654296875,
-0.01544189453125,
0.06591796875,
-0.06005859375,
-0.051025390625,
-0.046630859375,
-0.0454101... | 31,580 | 31580 | |
modular arithmetic
March 16th 2010, 10:53 PM #1
modular arithmetic
How would you go about proving that
$(a+b)\,\mbox{mod}\,n = a\,\mbox{mod}\,n + b\,\mbox{mod}\,n?$
We know by the D.A. that $a = nq + a',\, 0 \leq a' < n$
and $b = nq' + b',\,0 \leq b' < n$
These equations imply that
$a' = ... | 4 | [
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Reserve Bank of India
Indrajit Roy*
Abstract:
In this paper we use high-frequency multivariate data and attempt to model the joint distribution (dependence structure) of daily exchange rate returns of four major foreign curre... | 4 | [
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-... | 31,582 | 31582 | |
If x and y are perfect squares, then which one of the
Author Message
TAGS:
If x and y are perfect squares, then which one of the [#permalink] 05 Jun 2012, 02:48
... | 4 | [
0.09716796875,
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maxima minima problem HELP!
November 11th 2010, 07:16 PM
choward
maxima minima problem HELP!
the problem is f(x)=(x^3-3x)/(x^2-2)
I don't even know how to start I have to find the y and x intercepts first can someone tell me how i do that?
Then i tried to find the derivative but i don't think it was righ... | 4 | [
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Math Probability
Posted by Antonio on Monday, April 16, 2012 at 2:03pm.
If the probability that event A will happen is 1/4 and the probability of A not happening is 3/4, find the probability that event A happens 3 times out of 7 experiments
• Math Probability - MathMate, Monday, April 16, 2012 at 3:23pm
A bino... | 4 | [
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Create sum expression from algebraic expression
December 14th 2011, 07:23 AM
silver163
Create sum expression from algebraic expression
Hello,
I am trying to create a summation equation from this algebra equation, would it be possible?
x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x
If so can anyone help me?
De... | 4 | [
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0... | 31,586 | 31586 | |
binomial identities
November 7th 2009, 10:08 AM #1
$\binom{2n}{n} = \sum_{r=0}^{n}\binom{n}{r}^{2}$
Can somebody start me on this? I have the identities in front of me, but I just make a mess. No clue. Like what does:
$\sum_{r=0}^{n}\binom{n}{r}^{2}$
become?
It will help if you think of it this... | 4 | [
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0.0... | 31,587 | 31587 | |
ACT Question - cos and tan
October 13th 2009, 07:00 PM #1
Newbie
Joined
Oct 2009
Posts
5
ACT Question - cos and tan
Hello, I am preparing for the ACT and stumbled upon a question that I don't understand.
It says, "If tan x and cot x are defined, what is the value of (tan2x)(cot2x)?" (the 2 represent... | 4 | [
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Positive Almost Periodic Solution for a Model of Hematopoiesis with Infinite Time Delays and a Nonlinear Harvesting Term
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 146729, 6 pages
http://dx.doi.org/10.1155/2013/146729
Research Article
Positive Almost Periodic Solution for a Model of Hematopoiesis wi... | 5 | [
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-Metric Spaces
International Journal of Analysis
Volume 2013 (2013), Article ID 917158, 6 pages
http://dx.doi.org/10.1155/2013/917158
Research Article
Remarks on -Metric Spaces
^1Department of Mathematics, King Saud University, Saudi Arabia
^2Dipartimento di Matematica e Informatica, Università degli Studi di Palerm... | 5 | [
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-0.... | 31,590 | 31590 | |
Math Help
September 17th 2007, 08:33 AM #1
Newbie
Joined
Sep 2007
Posts
8
Please can you explain how do I do the following:
1. logN1 = log(N0 multiplied by 2^n)
Make n the subject?
All logarithms must be kept to the base 10.
Formula: Growth rate (k)
k = logN1 - logN0 / tlog2
... | 4 | [
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Does the independence of P = NP imply existence of arbitrarily good super-polynomial upper bound for SAT?
up vote 1 down vote favorite
2
Let me first define what "super-polynomial" means.
Definition. We call a function f super-polynomial if for all k, there exists a constant n such that for all x ≥ n, f(x) > x^k.
No... | 5 | [
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Trig Problem
November 20th 2008, 10:55 PM #1
Senior Member
Joined
Jul 2008
Posts
347
Trig Problem
(a) Explain why AP = 2cosθ.
(b) Find a similar expression for BP in terms of θ.
(c) Explain why the coordinates of pt P is (cos2θ, sin2θ).
(d) Prove that triangle APQ is similar to triang... | 4 | [
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Vectors in the Plane
April 25th 2010, 12:34 AM #1
Junior Member
Joined
Feb 2010
Posts
52
I'm having trouble with the algebra of this word problem.
Resultant Force: Find the angle between the forces given the magnitude of their resultant. Force 1 is a vector in the direction of the positive x-axis and... | 4 | [
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... | 31,594 | 31594 | |
Volume Integral
October 15th 2011, 08:04 AM #1
Junior Member
Joined
Mar 2011
Posts
68
Volume Integral
Question:
The volume V between
$z = \frac{5{x}^{2} + 3{y}^{2}}{R}$
And the x, y plane (z = xy?)
What is the volume of this region?
Thoughts?
$\iiint dV = \iiint dx dy dz$
G... | 5 | [
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Learn about Non Arithmetic Sequences
Learn about Non-Arithmetic Sequences Now let's learn about non-arithmetic sequences. The problem says for us to identify the pattern in the following sequence and then find the missing terms. The
sequence given to us is 45, 46, 43, 44, 41, blank and blank. We have to find the blank ... | 4 | [
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A Physical System :particularly hard lol
August 8th 2007, 10:13 AM #1
Newbie
Joined
Aug 2007
Posts
9
A Physical System :particularly hard lol
a really hard one here. would appreciate if you could start me off:
a physical system is governed by the following:
curl E = $-\frac{\partial B}{\partia... | 5 | [
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Finding eigenvectors
April 15th 2011, 09:53 AM #1
Junior Member
Joined
Apr 2011
Posts
30
Finding eigenvectors
Just out of my exam there and I it went fine except for one question. Getting the eigenvalues and eigenvectors of
1 0 8
4 3 12
0 0 7
I got eigenvalues of 1,3 and 7. However when... | 4 | [
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Construct Elliptic Curves as Jacobians
An elliptic curve is a genus one curve with a designated point. The Jacobian of a genus-one curve can be defined as the set of line bundles on the curve, and is isomorphic to the original genus-one
curve. It is also an elliptic curve with the trivial line bundle as designated poi... | 5 | [
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