content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
problem with first-order nonlinear ordinary differential equation
January 22nd 2010, 03:50 PM #1
Junior Member
Joined
Jan 2010
Posts
49
problem with first-order nonlinear ordinary differential equation
i have problem to find the solution for : $(3x^3y+2xy+y^3)+(x^2+y^2)dy/dx=0$
i have tried the exac... | 5 | [
-0.037109375,
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0.0299072265625,
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0.1494140625,
-0.06103515625,
-0.05517578125,
-0.037353515625,
0.0830078125,
0.00022029876708984375,
-0.05517578125... | 34,200 | 34200 | |
Quadratic Functions
December 7th 2008, 09:41 AM #1
Junior Member
Joined
Oct 2007
Posts
68
Hello, I was given a 30-question worksheet on quadratic equation problems. I have about 4 questions I can't solve. I'll post up one for now. Help is greatly appreciated. Thank you!
Pizza Unlimited has the follow... | 4 | [
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0.0037078857421875,
0.048828125,
-0.00781... | 34,201 | 34201 | |
Complex problem Z=z^2
December 5th 2010, 02:09 AM #1
Junior Member
Joined
Sep 2010
Posts
32
Complex problem Z=z^2
For what values a and b is the complex number z = a + bi a solution to z=z^2 ?
I tried this in many different ways and il post one of my solutions but i dont know if its correct.
(a+... | 4 | [
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Homework Help
Posted by G0al on Tuesday, April 30, 2013 at 10:55pm.
I need help:
If vector u has a magnitude of 4 meters and a direction of 17 degrees and vector v has a magnitude of 6 meters and a direction of 133 degrees. Find the magnitude of the resultant vector of u + 3v.
• Trigonometry - Reiny, Wednesday, Ma... | 4 | [
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Homework Help
Posted by Alexus on Monday, July 16, 2012 at 9:24pm.
1) A light bulb producing company states that its lights will last an average of 1200 hours with a standard deviation of 200 hours. A sample of 100 light bulbs from the company were tested and the
researcher found that the average life of each light bu... | 4 | [
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How To Count A Black Hole
Imagine you are tasked to build the ultimate computer memory. You are provided with an unlimited budget and all the resources you need.
How big a memory capacity could you build?
You decide to put it to a test. Being a clever cookie, you don't just order a huge pile of computer memory chip... | 4 | [
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Proposition 29
Lemma 1.
To find two square numbers such that their sum is also square.
Set out two numbers AB and BC, and let them be either both even or both odd. Then since, whether an even number is subtracted from an even number, or an odd number from an odd number, the remainder
is even, therefore the remainder... | 5 | [
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0.... | 34,206 | 34206 | |
Probability pdf
July 4th 2008, 07:53 PM #1
Junior Member
Joined
Jun 2008
Posts
53
Probability pdf
Hey all. Here's another I can't get.
The life, X in years of a car part had pdf:
f(x)= 3x² / 7³ * e^-(x/7)³ ; 0 < x < infinity
a) probability that this regulator will last at least 7 years?
... | 5 | [
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Set theory question
November 2nd 2005, 12:06 PM #1
Newbie
Joined
Nov 2005
Posts
12
Set theory question
Hi all,
As a homework, I've been asked to find whether there is or not an infinite group such that all of its proper subgroups are finite.
I've been told to consider {m/2^n, m,n integers, 0<=m... | 5 | [
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A Constraint Programming Method for Advanced Planning and Scheduling System with Multilevel Structured Products
Discrete Dynamics in Nature and Society
Volume 2014 (2014), Article ID 917685, 7 pages
http://dx.doi.org/10.1155/2014/917685
Research Article
A Constraint Programming Method for Advanced Planning and Schedu... | 4 | [
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Combination question
June 19th 2013, 03:33 AM
downthesun01
Combination question
In a poker hand of 5 cards from an ordinary deck of 52 cards, find the probability of getting a full house. Note: a full house is a hand that consists of 3 of one rank and 2 of another.
My solution:
$\frac{13{{4}\choose{3}}... | 4 | [
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-... | 34,210 | 34210 | |
fourier coefficients
February 23rd 2008, 05:26 AM #1
Member
Joined
Jan 2008
Posts
114
fourier coefficients
Find the Fourier cosine coefficients of $e^x$
$e^x = \frac{1}{2}a_0 + \displaystyle\sum_{n=1}^\infty a_n cos \frac{n \pi x}{L}$
Differentiating yields:
$e^x = - \displaystyle\sum_{n=... | 4 | [
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Solving an equation in powers of 10
$10^{(x+1)(3x+4)} - 2*10^{(x+1)(x+2)} = 10^{1-x-x^2}$ $10^{3x^2+7x+4} - 2*10^{x^2+3x+2} = 10^{-x^2-x+1}$ Multiply both sides by $10^{x^2 + x}$: $10^{4x^2+8x+4} - 2*10^{2x^2+4x+2} = 10$ $10^{2(2x^
2+4x+2)} - 2*10^{2x^2+4x+2} = 10$ Let $w = 10^{2x^2+4x+2}$: $w^2 - 2w = 10$ $w^2 - 2w - ... | 5 | [
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non homogeneous recurrence relations :(
April 24th 2013, 06:11 PM
ineedalottahelp
non homogeneous recurrence relations :(
So I have an assignment and i'm having trouble doing it. The question in hand.
1. a) Solve the recurrence relation:
a[n] = 4a[n-1] + 5a[n-2 ]+ (-1)^n(36n - 6) + ( (-1)^n(11n - 10) / ... | 4 | [
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Homework Help
Posted by Claire on Friday, March 25, 2011 at 3:18pm.
Looking for some guidance please, I need to find the initial-value problem for dy/dx = 1+2cos^2x / y. y = 1 when x = 0.
any help is much appricated
• maths - Reiny, Friday, March 25, 2011 at 5:14pm
the hard part is to integrate the cos^2x
... | 5 | [
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the encyclopedic entry of solar constant
The
solar luminosity
,
$L_odot$
, is a unit of
luminosity
(
power
emitted in the form of
photons
) conventionally used by
astronomers
to give the luminosities of
stars
. It is equal to the current accepted luminosity of the
Sun
, which is 3.839 × 10
^26 W
, or ... | 4 | [
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2 Conics Questions I don't get!
May 24th 2009, 06:27 PM #1
Super Member
Joined
Nov 2008
Posts
597
2 Conics Questions I don't get!
Can someone please explain the last two questions of my homework please because I really don't get it.
Any help would be greatly appreciated!
Thanks in advance!
... | 4 | [
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Legendre symbol
May 6th 2008, 02:18 PM
Rakesh
Legendre symbol
Determine the values of
47/37 and
3/43
stating any properties of the legendre symbol used.
is there just one method to solve all of these or are there different methods to solve depending on the numbers.
May 6th 2008, 06:19 PM
Th... | 5 | [
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How would I do this? I have the answer and most steps but....
March 10th 2011, 02:29 AM
twittytwitter
How would I do this? I have the answer and most steps but....
Let A be a positive number and define a curve parametrically by
x(t)=t^3-t and y(t)=A/(1+t^2).
Note that there is one value of A for which th... | 4 | [
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Calculating Variable ffrom Derivative of a Triangle
April 11th 2012, 01:57 PM #1
Member
Joined
Jul 2011
Posts
140
Calculating Variable ffrom Derivative of a Triangle
(i) is already solved for & answers are provided separately.
I'm using a method for differentiation from a text book that should yield... | 5 | [
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Differential Equations - At A Glance
Topics
Introduction to Differential Equations - At A Glance:
Things to remember about Euler's Method:
• Euler's Method gives only approximate values unless the function happens to be a straight line, in which case Euler's Method gives exact values of the function.
• Euler's m... | 4 | [
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solving this
December 4th 2006, 12:48 PM #1
Newbie
Joined
Dec 2006
Posts
3
solving this
my first puzzle,,,,let's play with puzzles
The figure below is a number pyramid. The number in each square is the sum of the numbers in the two squares on which it rests (except for the squares in the bottom row)... | 5 | [
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stuck on two mathematical induction problems
March 12th 2012, 07:38 PM #1
Newbie
Joined
Mar 2012
From
San diego
Posts
1
stuck on two mathematical induction problems
Hello,
I have been trying to solve this problem for the last hour and haven't gotten anywhere. Got any ideas?
#1
(1 - 1/2)... | 4 | [
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... | 34,222 | 34222 | |
First, we'll learn how to make a coefficient matrix. We'll start with the following examples:
x + 4y = 6
2x – 3y = 9
This is all fine and dandy, we know all about coefficients. The first equation has a -4, while the second equations has a 2 and a -3. But what's the coefficient in front of the first x? That's right;
... | 4 | [
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... | 34,223 | 34223 | |
sums with lnx
April 21st 2008, 12:53 PM #1
sums with lnx
I'm having trouble trying to figure out what to do for convergence and divergence for a series that has lnx in it
for example
$\sum\frac{lnk}{e^{k}}$ and $\sum\frac{lnk}{k^{2}}$
Hello,
I think ratio test can work too...
$\ln (n) \le... | 4 | [
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0.053222... | 34,224 | 34224 | |
Probability
October 18th 2007, 03:55 PM
peachgal
Probability
Probability
Sandra's music bag contains:
3 cds of country music
6 cds of rock and roll
4 cds of rap music
5 cassette tapes of country music
1 cassette tape of rock and roll
3 cassette tapes of rap music
a) As Sandra d... | 4 | [
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An introduction to neural networks
According to a simplified account, the human brain consists of about ten billion neurons -- and a neuron is, on average, connected to several thousand other neurons. By way of these connections,
neurons both send and receive varying quantities of energy. One very important feature of ... | 4 | [
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Rectangle in an isosceles triangle
October 30th 2010, 01:17 AM #1
Rectangle in an isosceles triangle
There is a rectangle inside an isosceles triangle. One side of the rectangle is on the base of the isosceles triangle. The 2 corners on the other side of the rectangle are touching the equal
lengths of the 2 i... | 4 | [
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-0.021240234375,
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0.038330078125,
0.0054931640625,
-0.0147705078125,
0.0703125,
-0.0167236328125,
0.0986328125,
-0.01080322265625,
0.0065612792968... | 34,227 | 34227 | |
Find simple expression for f28
For the functions f1(x)=(2x-1)/(x+1) f(n+1)(x)=f1(fn(x)) for n>=1 it can be shown that f35=f5.Find the simple expression for f28.
If $f_{35} = f_5$ then $f_1$ composed with itself 35 times is the same as $f_1$ composed with itself 5 times. So $f_1$ composed with itself 30 times must be t... | 4 | [
-0.0306396484375,
0.01300048828125,
0.0191650390625,
0.044189453125,
-0.039306640625,
-0.030517578125,
0.0625,
0.060546875,
-0.0220947265625,
0.015625,
-0.019287109375,
-0.09716796875,
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-0.01708984375,
-0.040771484375,
-0.03466796875,
-0.07958984375,
0.004577636718... | 34,228 | 34228 | |
Building a better Guinea and Feather
The Guinea and Feather is one of the most important experiments in classical physics and it is still performed today as a lecture demonstration for thousands of introductory physics students. It
shows that the Earth's gravity accelerates all objects equally, regardless of mass i.e. ... | 4 | [
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0.04248046875,
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-0.08203125,
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0.08593... | 34,229 | 34229 | |
statistics problem
February 27th 2009, 09:30 AM #1
Newbie
Joined
Feb 2009
Posts
11
statistics problem
Would someone please help me in the solving and checking my following question and an another solution--
Q1. Let X equal the number of people selected at random that you must ask in order to find som... | 5 | [
0.053466796875,
0.06884765625,
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-0.0... | 34,230 | 34230 | |
Math Help
August 18th 2009, 07:33 AM #1
Junior Member
Joined
Aug 2009
Posts
62
Functions
Hi everyone,
I am asked to determine all functions f continious in $\mathbb{R}$ such as:
${f(2009)=2009^{2008}\atop (\forall(x;t)\in \mathbb{R}^2) f(x+t)=f(x)+f(t)}$
I don't know how to start?
Ca... | 5 | [
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0.053955078125,
0.07275390625,
0.039306640625,
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0.01422119140625,
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-0.03955078125,
-0.10107421875,
-0.0981445... | 34,231 | 34231 | |
I will use a 'g' for delta and a small 'e' for episilon to find delta
September 29th 2009, 04:56 AM #1
Junior Member
Joined
Apr 2009
Posts
37
I will use a 'g' for delta and a small 'e' for episilon to find delta
I must find the value of 'g'>0 such that |f(x) - L| < 'e' when 0 < |x-a| < 'g' lim x-> 9 (squ... | 4 | [
0.0128173828125,
0.0115966796875,
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0.05029296875,
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-0.0023956298828125,
-... | 34,232 | 34232 | |
Homework Help
Posted by Aless on Sunday, August 22, 2010 at 2:37pm.
Use the quadratic formula to find the real solutions:
2x/x-3 + 2/x = 3
I know I multiply both sides by x(x-3), but I don't know how to do that.
• Algebra - Reiny, Sunday, August 22, 2010 at 3:36pm
rewrite the equation as ...
[2x/(x-3)](x... | 4 | [
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... | 34,233 | 34233 | |
vector problem- trouble with angles
September 2nd 2009, 03:29 PM #1
Junior Member
Joined
Mar 2009
Posts
41
vector problem- trouble with angles
A car is driven east for a distance of 45 km, then north for 29 km, and then in a direction 29° east of north for 27 km. Determine (a) the magnitude (in km) of th... | 4 | [
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0.034912109375... | 34,234 | 34234 | |
Math - Linear Algebra
Posted by Mary on Sunday, December 8, 2013 at 7:01pm.
Let S be the plane defined by x−4y−3z = −18, and let T be the plane defined by −2x+8y+7z = 41. Find the vector equation for the line where S and T intersect.
x 0 0
y = 0 + t0
z 0 0
• Math - Linear Algebra - Reiny, Sunday, December 8, 201... | 4 | [
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the encyclopedic entry of no growth
The
Exogenous growth model
, also known as the
Neo-classical growth model
or
Solow growth model
is a term used to sum up the contributions of various authors to a
model
of long-run
economic growth
within the framework of
neoclassical economics
.
Development of the model
... | 4 | [
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-0.125,
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... | 34,236 | 34236 | |
Another Small Problem
March 13th 2009, 03:43 AM #1
Newbie
Joined
Feb 2009
Posts
6
Another Small Problem
Hello there, I have met another small problem that I need some help
Suppose you have an 40-card deck. 3 of the cards are marked. You draw 6 cards. What are the chances of having 1 of these marked ... | 4 | [
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0.04296875,
0.0027770... | 34,237 | 34237 | |
Need help with trig identities
October 26th 2009, 05:40 PM #1
Newbie
Joined
Oct 2009
Posts
19
Need help with trig identities
If you could go step by step it would be helpful!
cotx+tanx = secxcscx
sin^4x - cos^4x = 2sin^2x - 1
cot^2x-1/1+cot^2x = 1-2sin^2x
Thanks!
Wait, how do ... | 4 | [
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0.05029296875,... | 34,238 | 34238 | |
property of logarithms
Proving is a process - property of logarithms
The purpose of this article is to talk about proving. Many kids fear proving and just cannot do it. This may stem from several reasons. Remember that proving a math thing is like solving a problem:
it is a process. It many times is a process of tria... | 4 | [
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0.048339843... | 34,239 | 34239 | |
Help with 2-d arrays, tough problem
June 11th, 2012, 08:36 PM
aesguitar
Help with 2-d arrays, tough problem
The problem I'm attempting is fairly complicated in solving as there may be many ways to solve it, I just can't figure out a way. Here it goes. In a 2x2 grid, there are 6 possible paths from the
top le... | 5 | [
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0.00... | 34,240 | 34240 | |
Grover's search algorithm
Grover's algorithm is a quantum algorithm for searching an unsorted database with N entries in O(N^1/2) time and using O(logN) storage space (see big O notation). It was invented by Lov Grover in
1996.
Introduction
Classically, searching an unsorted database requires a linear search, which i... | 4 | [
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-0.... | 34,241 | 34241 | |
How do I Create the Identity Matrix in R?
June 27, 2012
By Isomorphismes
I googled for this once upon a time and nothing came up. Hopefully this saves someone ten minutes of digging about in the documentation.
You make identity matrices with the keyword diag, and the number of dimensions in parentheses.
> diag(3)
... | 5 | [
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0.078613... | 34,242 | 34242 | |
solution combinations
December 22nd 2008, 12:41 PM #1
Newbie
Joined
Dec 2008
Posts
2
solution combinations
I will have 7 numbers from 1 to 39. They can be any 7 numbers of 1 to 39. So how many parts i have to divide of those numbers. Example it can be 1,6,9,23,33,35,37 or other differents number. So
... | 4 | [
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-0.03955078125,
-0.001121520... | 34,243 | 34243 | |
Determining Linear Independence
February 9th 2011, 04:15 PM #1
Newbie
Joined
Mar 2009
Posts
20
Determining Linear Independence
[Solved, thanks]
Hi. My Linear Algebra with Applications, 4th Ed. by Otto Bretscher (Pearson International Edition) poses the following exercise:
Consider linearly ind... | 4 | [
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0... | 34,244 | 34244 | |
Problem help - Orthogonal Bases
June 12th 2010, 11:19 AM #1
Newbie
Joined
Jun 2010
Posts
7
Problem help - Orthogonal Bases
Consider the following Subspace on R3:
U={(x1,x2,x3) € R3: x1-2x2+x3=0}
Which of the following group of vectors is an orthogonal basis of U?
A - {(1,-2,1), (-1,0,1)}
... | 4 | [
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-0.067871... | 34,245 | 34245 | |
Poisson process question
June 21st 2011, 06:35 AM #1
Newbie
Joined
Jun 2011
Posts
1
Poisson process question
Given a poisson process Z(t) with a given rate lamda, k and m nonnegative integers and t and c real and positive numbers, calculate the probability:
P(Z(t-c)=m | Z(t)=k)
thank you
Re: Po... | 5 | [
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-0... | 34,246 | 34246 | |
Predicate Logic HELP.
February 15th 2010, 12:48 PM
XDemonoid
Predicate Logic HELP.
Ok, I need to convert an English sentence to predicate logic.
The domain is C , the set of Olympic competitors.
f(x,y) = x is faster than y
s(x,y) = x is the same person as y.
b(x,y) = x beats y
w(x) = x is t... | 5 | [
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... | 34,247 | 34247 | |
Qualitative Analysis of Coating Flows on a Rotating Horizontal Cylinder
International Journal of Differential Equations
Volume 2012 (2012), Article ID 570283, 30 pages
http://dx.doi.org/10.1155/2012/570283
Research Article
Qualitative Analysis of Coating Flows on a Rotating Horizontal Cylinder
^1School of Mathematic... | 4 | [
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0.005310... | 34,248 | 34248 | |
Show that all non integral solutions lie on exactly two lines
May 20th 2009, 09:08 PM #1
Show that all non integral solutions lie on exactly two lines
Consider the equation $\lfloor x \rfloor \lfloor y \rfloor = x + y$.
Show that all non-integral solutions of this equation lie on exactly two lines.
The ... | 4 | [
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-0.0654296875,
-0.04370... | 34,249 | 34249 | |
Homework Help
Posted by Ben on Saturday, June 4, 2011 at 2:15am.
Find the distance between the points (12, 8) and (4, 2).
100 units
14 units
10 units
–10 units
Find the midpoint of the points (3, 1) and (7, –5).
(1, 6)
(2, 1)
(2, –3)
(5, –2)
Find the vertex and focus of the parabola whose equation is 4y = x2... | 5 | [
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0.09228515625,
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-0.0... | 34,250 | 34250 | |
Approximable and Cumulatively Enumerable Distributions
Next: TM-Induced Distributions and Convergence Up: Measures and Probability Distributions Previous: Universal Cumulatively Enumerable Measure
To deal with infinite x, we will now extend the treatment of semimeasures on B^* in the previous subsection by discu... | 4 | [
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0.0057373046875,... | 34,251 | 34251 | |
Physics Forums - View Single Post - Zeroes at the end of a FACTORIAL
SteveRives
Your question is the same as finding out how often 5 is a prime factor on the natural numbers.
So I am guessing that 100! has 20 zeros, because in counting by fives, we get to 100 after 20 steps.
You are WRONG, SteveRives.
24 zeros is ... | 4 | [
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0.002... | 34,252 | 34252 | |
Vector space problem (lin. algebra)
April 17th 2007, 10:37 AM #1
Junior Member
Joined
Dec 2006
Posts
43
Vector space problem (lin. algebra)
If anyone could explain how the following problem is done, I would really appreciate it!
Here is a vector candidate. The set is R, and we define scalar multipli... | 4 | [
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0.06396484375,
-0.007598876... | 34,253 | 34253 | |
2nd Order Differential Equations
February 16th 2009, 08:46 AM #1
Member
Joined
Nov 2008
Posts
92
2nd Order Differential Equations
Hello,
Second order differential equation:
y'' - y = exp[x]
Solving for the complementary function, y_c:
m^2 - 1 = 0
-> m = 1 and m = 0
:. y_c = A... | 5 | [
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0.0324707... | 34,254 | 34254 | |
Homework Help
Posted by ana on Saturday, September 29, 2012 at 8:44pm.
Draw and label the following: segment AB intersects segment CD at point M. M is the midpoint of both segments. If AM = x2 + 8x + 17 and MB = 12x + 14, find AB.
• geometry - Reiny, Saturday, September 29, 2012 at 8:50pm
So x^2 + 8x + 17 = 12... | 4 | [
-0.00634765625,
0.11083984375,
-0.0150146484375,
-0.099609375,
-0.00982666015625,
0.00714111328125,
0.08056640625,
0.05615234375,
-0.0081787109375,
0.01446533203125,
0.048828125,
-0.06640625,
0.08349609375,
0.016357421875,
0.0400390625,
0.0654296875,
-0.010498046875,
-0.06298828125... | 34,255 | 34255 | |
Homework Help
Posted by kim on Thursday, January 2, 2014 at 1:51pm.
51.A sequence t is defined where the first term is –4. Each successive term is 3 more than the term before it.
(a)Write an explicit formula for the sequence t.
(b)A second function is defined as s(n) = 2 + 2n. Compare the rates of change of t(n) and... | 4 | [
-0.038330078125,
0.021484375,
-0.00087738037109375,
-0.087890625,
-0.041015625,
0.0257568359375,
-0.03271484375,
0.06494140625,
0.06591796875,
0.0260009765625,
0.005096435546875,
-0.04736328125,
-0.04150390625,
0.00040435791015625,
-0.03173828125,
-0.042236328125,
-0.031005859375,
... | 34,256 | 34256 | |
Wording of a question: Inequalities
January 18th 2010, 01:34 PM #1
Newbie
Joined
Jan 2010
Posts
10
Wording of a question: Inequalities
Hi All,
I have an issue with a wording of a question: It says 2 parts:
a) Sketch the graph of y = |2x-1|
This is easy enough but the next part:
b) solv... | 4 | [
-0.0294189453125,
0.0185546875,
0.01806640625,
-0.044921875,
-0.03466796875,
-0.01275634765625,
-0.0177001953125,
0.043212890625,
-0.064453125,
-0.005859375,
-0.023681640625,
-0.039306640625,
0.1201171875,
0.0478515625,
0.029052734375,
0.059814453125,
0.0286865234375,
-0.1201171875... | 34,257 | 34257 | |
Tricky complex numbers question
1. The problem statement, all variables and given/known data
Harder: given that
√(−15 − 8i) = ±(1 − 4i) obtain the two solutions of the equation
z² + (−3 + 2i)z + 5 − i = 0
2. Relevant equations
I can easily prove √(−15 − 8i) = ±(1 − 4i) but that's not important
3. The attempt at a s... | 4 | [
-0.15625,
0.06103515625,
0.048828125,
0.00119781494140625,
-0.0201416015625,
-0.04248046875,
0.0181884765625,
0.044189453125,
0.01446533203125,
-0.00701904296875,
0.06396484375,
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0.06005859375,
0.111328125,
-0.017333984375,
0.00150299072265625,
-0.0022125244140625,
-0.... | 34,258 | 34258 | |
trigonometric and hyperbolic substitution
June 1st 2008, 11:00 PM #1
Junior Member
Joined
Mar 2008
Posts
45
trigonometric and hyperbolic substitution
Hi all,
My apologises to angel.white, i completely typed the incorrect question and i would like to thank Isomorphism
Using an appropriate trigon... | 5 | [
0.10009765625,
0.0009765625,
0.08935546875,
0.0263671875,
-0.0211181640625,
-0.03955078125,
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-0.006591796875,
0.033447265625,
-0.05908203125,
0.03271484375,
-0.07666015625,
-0.024169921875,
0.021484375,
-0.038818359375,
0.04736328125,
0.06884765625,
-0.0031890869140625... | 34,259 | 34259 | |
Ring homomorphism
May 6th 2009, 03:05 AM
Maccaman
Ring homomorphism
Let $f : \mathbb{Z}/3\mathbb{Z} \rightarrow \ \mathbb{Z}/6\mathbb{Z}$ be defined by $f(x) = 4x$ Is $f$ a well-defined ring homomorphism? If so, find its kernel and image.
May 6th 2009, 03:14 AM
NonCommAlg
Quote:
yes it is and the ke... | 5 | [
0.01336669921875,
0.018798828125,
-0.11767578125,
-0.0400390625,
0.01495361328125,
-0.04248046875,
0.037109375,
-0.01104736328125,
-0.0478515625,
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0.0986328125,
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-0.0186767578125,
-0.0194091796875,
0.0205078125,
0.037353515625,
-0.0791015625,
0.0267333... | 34,260 | 34260 | |
Logarithmic expression
November 25th 2008, 01:13 PM #1
Junior Member
Joined
Sep 2008
Posts
30
Logarithmic expression
Hello guys!
Could someone help me with this problem? Coz Ive been trying to solve this already for an hour but still I dont get it.
Heres the question, FInd the exact value of th... | 4 | [
0.001983642578125,
0.052978515625,
0.06494140625,
0.0152587890625,
-0.0036773681640625,
-0.021240234375,
0.057373046875,
-0.00677490234375,
-0.007232666015625,
0.06640625,
0.011962890625,
-0.0302734375,
0.018798828125,
0.003509521484375,
0.0546875,
0.15234375,
-0.1513671875,
0.0327... | 34,261 | 34261 | |
triple integral in given region
November 16th 2009, 08:03 PM #1
Member
Joined
Sep 2009
Posts
129
triple integral in given region
Evaluate the triple integral
what are the limit of z,y and x to integrate?
I got
$-sqrt(1-y^2) \leq z \leq sqrt(1-y^2)$
$-1 \leq y \leq 1$
$0 \leq x \leq ... | 5 | [
0.006500244140625,
0.0035552978515625,
-0.01141357421875,
-0.08935546875,
0.01519775390625,
-0.0703125,
-0.05859375,
0.1171875,
-0.06689453125,
-0.0289306640625,
-0.0859375,
0.08740234375,
0.023681640625,
0.107421875,
-0.0034637451171875,
-0.055419921875,
-0.0390625,
-0.05615234375... | 34,262 | 34262 | |
L'Hospital's questions
April 9th 2013, 07:31 PM
Alucard2487
L'Hospital's questions
I've done a bunch of practice for my quiz tomorrow. However, I can't seem to find the answers to one of the worksheets so i can check my answers.
1. lim x->0 1-cox/x^2. My answer 1/2
2. lim x-> infinity ln(x)^2/x. My ans... | 5 | [
0.0167236328125,
-0.0255126953125,
0.019775390625,
0.042724609375,
0.06787109375,
0.0064697265625,
0.00457763671875,
0.004791259765625,
0.058349609375,
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0.09130859375,
-0.03466796875,
0.0286865234375,
0.048583984375,
-0.06982421875,
-0.01446533203125,
-0.042236328125,... | 34,263 | 34263 | |
Rotation by 45 degrees
January 19th 2011, 01:53 PM #1
MHF Contributor
Joined
Mar 2010
From
Florida
Posts
3,093
Thanks
5
Rotation by 45 degrees
I don't need help with the problem just with how do I do a rotation of the axes by $\pm\frac{\pi}{4}$.
$u_{xx}-u_{yy}=0$
$u_{xy}=0$
Thanks.... | 5 | [
0.0045166015625,
0.05126953125,
-0.017822265625,
-0.1201171875,
0.024658203125,
0.031982421875,
-0.004150390625,
-0.0654296875,
0.0096435546875,
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0.10107421875,
0.00421142578125,
-0.05712890625,
0.0025787353515625,
0.031982421875,
0.06591796875,
-0.134765625,
0.01818... | 34,264 | 34264 | |
Appendix B. Using SUDAAN and Other Software for the Analysis of the 2002 National Transportation Availability and Use Survey
Using SUDAAN and Other Software for the Analysis of the 2002 National Transportation Availability and Use Survey
Variance estimation procedures have been developed to account for complex samp... | 5 | [
-0.01373291015625,
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0.06005859375,
0.0267333984375,
-0.012939453125,
-0.020751953125,
-0.055908203125,
0.044921875,
0.01483154296875,
-0.0091552734375,
-0.045654296875,
0.0302734375,
0.0439453125,
-0.0380859375,
-0.0322265625,
-0.035400390625,
0.06396484375,
0.02758... | 34,265 | 34265 | |
Newton method help
May 20th 2008, 09:20 PM #1
Newton method help
I have an exam on Tuesday 27th. I need to know well the bisection method, secant method, newton method and a lot more.
I have a sheet of around 25 exercises. I could do some pretty easy, but others are too hard for me.
I have a lot of questi... | 5 | [
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-0.064453125,
0.060546875,
-0.000835418701171875,
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0.00958251953125,
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0.055908203125,
0.0026397705078125,
0.07958984375,
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0.04443359375,
-0.00433349609375,
-0.05810546875,
-0.01165771484375,
0.015869140625,
-0.0417480468... | 34,266 | 34266 | |
Wolfram Demonstrations Project
Probability Density for a Classical Harmonic Oscillator
A classical harmonic oscillator with mass and spring constant has a total energy , dependent on its amplitude . We determine the probability density as the position varies between and , making use
of its oscillation frequency (or pe... | 4 | [
-0.06640625,
0.07177734375,
0.0284423828125,
0.021240234375,
-0.062255859375,
0.0234375,
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0.025390625,
0.0218505859375,
0.0361328125,
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0.0517578125,
-0.040771484375,
0.006561279296875,
-0.0272216796875,
0.01165771484375,
0.00830078... | 34,267 | 34267 | |
Integration
Let $I = \int_0^{\frac{\pi}{2}} e^{4y} \sin (3y) dy$ Use integration by parts twice. For the first round, use: $u = e^{4y}$ and $dv =\sin (3y) dy$ To get: $I = -\frac{1}{3}e^{4y}\cos (3y) \bigg|_0^{\
frac{\pi}{2}} + \frac{4}{3} {\color{blue}\int_0^{\frac{\pi}{2}} e^{4y} \cos (3y) dy}$ Use integrationg by pa... | 5 | [
0.0107421875,
0.0260009765625,
-0.036376953125,
-0.1103515625,
0.068359375,
-0.06201171875,
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0.0126953125,
-0.037353515625,
0.00250244140625,
-0.000530242919921875,
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-0.000957489013671875,
0.000858306884765625,
0.115234375,
-0.0537109375,
-0.0859375,
... | 34,268 | 34268 | |
Math-Gr.11 urgent
Posted by Mae on Sunday, January 4, 2009 at 10:58pm.
The 10th term of an arithmetic series is 34, and the sum of the first 20 terms is 710. Determine the 25th term.
Can someone please explain how to do this? I don't know which formula to use. TIA
• Math-Gr.11 urgent - Reiny, Sunday, January 4, 20... | 4 | [
-0.09423828125,
0.023681640625,
0.06201171875,
-0.07958984375,
0.00537109375,
0.072265625,
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0.044189453125,
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0.07080078125,
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-0.0064697265625,
-0.078125,
-0.099609375,
-0.08642578125,
-0.0111083984375,... | 34,269 | 34269 | |
Some probability problems
April 19th 2010, 07:36 AM #1
Newbie
Joined
Dec 2009
Posts
15
Some probability problems
Hello everybody!
I don't have right answers for the problems below, so I would really appreciate if someone could check my answers. I'm not sure if any of this is right.
1. We have ... | 4 | [
0.006378173828125,
-0.0267333984375,
0.08203125,
-0.0634765625,
-0.0147705078125,
0.046142578125,
0.12353515625,
0.037353515625,
-0.05224609375,
0.041748046875,
0.0211181640625,
-0.053466796875,
0.06396484375,
0.00038909912109375,
-0.0026397705078125,
0.09814453125,
0.027099609375,
... | 34,270 | 34270 | |
II: H
Sacred Texts Legends and Sagas England Index Previous Next
Stonehenge and Other British Stone Monument... | 5 | [
0.037353515625,
0.09423828125,
0.0791015625,
-0.01220703125,
-0.02294921875,
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-0.046875,
-0.0732421875,
0.01544189453125,
-0.0830078125,
0.08544921875,
... | 34,271 | 34271 | |
-Quasi-Cauchy Sequences
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 836970, 4 pages
http://dx.doi.org/10.1155/2013/836970
Research Article
A Study on -Quasi-Cauchy Sequences
^1Maltepe University, Department of Mathematics, Faculty of Arts and Science, Marmara Eğitim Köyü, Maltepe, 34857 Istanbul, Tu... | 5 | [
-0.12353515625,
-0.029541015625,
-0.017333984375,
-0.06884765625,
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0.0771484375,
0.00933837890625,
-0.050048828125,
0.06640625,
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0.037353515625,
0.053955078125,
0.033935546875,
0.00933837890625,
-0.02734375,
-0.07861328125,
0.00555419921875,
-0.0388... | 34,272 | 34272 | |
Computing Derivatives - At A Glance
Topics
Introduction to Computing Derivatives - At A Glance:
A power function is any function of the form f(x) = x^a, where a is any real number.
Sample Problem
The following are all power functions:
Sample Problem
The following are all power functions, written deceptively.The f... | 4 | [
0.0277099609375,
-0.0390625,
0.005035400390625,
0.119140625,
-0.028076171875,
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0.00604248046875,
-0.030029296875,
0.05908203125,
0.083984375,
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0.021728515625,
0.0023651123046875,
0.08447265625,
-0.022705078125,
0.052734375,
-0.107421875,
0.06396484375... | 34,273 | 34273 | |
Rate of Change - Volume and Surface Area of Cylinder
September 29th 2007, 11:57 AM #1
Junior Member
Joined
Sep 2007
Posts
29
Rate of Change - Volume and Surface Area of Cylinder
We have a special type of cylinder whose height, h, is always twice its radius r. What is the rate of change of its volume V wi... | 5 | [
0.0322265625,
0.05322265625,
0.0064697265625,
-0.019775390625,
0.0294189453125,
0.00677490234375,
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0.06201171875,
-0.0020294189453125,
-0.010009765625,
-0.0303955078125,
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0.0252685546875,
0.095703125,
0.035888671875,
-0.0147705078125,
-0.0238037109375,
... | 34,274 | 34274 | |
The Binomial Distribution errors?
February 16th 2011, 11:25 AM #1
Junior Member
Joined
Jul 2009
Posts
49
The Binomial Distribution errors?
just thought i would go on a few sites and pratice some Binomial Distribution questions
i found these on tutorvista , is it me or are all the answers given wrong
... | 4 | [
0.0654296875,
-0.02685546875,
-0.0294189453125,
-0.04541015625,
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0.12890625,
0.018798828125,
0.05859375,
0.1015625,
-0.004669189453125,
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0.031982421875,
0.0260009765625,
0.011962890625,
0.006317138671875,
-0.00396728515625,
-0.0319... | 34,275 | 34275 | |
Homework Help
Posted by jarlee on Sunday, October 17, 2010 at 4:20am.
one side of a right triangle is 8 cm.the hypotenuse is 3 cm.more than twice of the other side.what is the measure of the other side?illustrate using the pythagorian theorem
• math - drwls, Sunday, October 17, 2010 at 6:56am
Let the "other si... | 4 | [
0.012451171875,
0.119140625,
-0.0498046875,
0.036865234375,
-0.0400390625,
0.034423828125,
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0.033203125,
0.01434326171875,
-0.037353515625,
0.003326416015625,
0.00274658203125,
0.00872802734375,
0.00927734375,
0.005157470703125,
-0.05224609375,
-0.07568359375,
0.005... | 34,276 | 34276 | |
Homework Help
Posted by lila on Wednesday, January 2, 2013 at 12:46pm.
I have a few questions I need help with. They are to help review for our exam.
4) Without graphing, is each system independent, dependent, or inconsistent?
-x-3y=0
x-y=4
(i believe dependent)
dependent
independent
inconsistent
6) Which matr... | 4 | [
-0.08642578125,
-0.00701904296875,
-0.09375,
-0.028564453125,
0.0245361328125,
-0.05126953125,
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-0.0203857421875,
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0.014892578125,
0.11376953125,
0.00250244140625,
0.042724609375,
0.057861328125,
-0.008056640625,
0.00616455078125,
-0.11328125,
-0.08... | 34,277 | 34277 | |
Galois group
Does anyone know how to find the Galois group of x^3-3 over the finite field F_13?
Thanks- I had worked out that the degree of the splitting field is three, but what does this tell me? Since the polynomial is not separable, presumably it's not the case that the size of the Galois
group is 3. (But that 3 d... | 5 | [
0.0223388671875,
-0.031982421875,
-0.07666015625,
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0.0247802734375,
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-0.0157470703125,
-0.0947265625,
... | 34,278 | 34278 | |
Finding the Change of Basis Matrix
September 8th 2009, 04:38 AM
2legit2quit
Finding the Change of Basis Matrix
Well this question has been driving me crazy.
Let B = {[v1,v2]} and C = {[u1,u2]}.
$v_1$ = $\begin{array}{cc}1\\0\\1\end{array}$ , $v_2$ = $\begin{array}{cc}1\\1\\1\end{array}$
$u_1$ = $... | 5 | [
-0.0050048828125,
-0.0240478515625,
-0.1240234375,
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0.05322265625,
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-0.07177734375,
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-0.04052734375,
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-0.0308837890625,
-0.01092529296875,
0.00927734375,
-0.025634765625,
-0.051513671875,
-... | 34,279 | 34279 | |
cylinder sphere problem
August 4th 2005, 07:49 AM #1
Member
Joined
Jul 2005
Posts
187
Is this radius right ?
Look at drawing and say is it right or not.
First of all. The bigger circle on the drawing is a cylinder. Three smaller circles are spheres. And they are situated as you can see on the drawin... | 4 | [
-0.018310546875,
-0.002288818359375,
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0.047607421875,
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0.053955078125,
0.037109375,
0.0103759765625,
-0.04052734375,
-0.0673828125,
-0.... | 34,280 | 34280 | |
Derivatives of log function!
February 19th 2009, 10:31 PM
katieeej
Derivatives of log function!
The problem is f(x)=(ln x^2)^2
I looked at the answer key and the answer is 4(ln x)^2/x
I do not get how the numerator can be squared.
I only got 4(ln x).
and how the denominator becomes x, instead of ... | 5 | [
0.0595703125,
-0.06787109375,
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0.03662109375,
0.0390625,
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0.0157470703125,
0.0018463134765625,
-0.0225830078125,
0.06787109375,
-0.05810546875,
-0.0065612... | 34,281 | 34281 | |
Derivative of a matrix inverse and matrix determinant
February 24th 2011, 12:14 AM #1
Newbie
Joined
Mar 2007
Posts
24
Derivative of a matrix inverse and matrix determinant
Hi,
my multivariate statistics course strikes again with unproven linear algebra results!
This time, there's a calculation ... | 5 | [
-0.024169921875,
-0.0947265625,
0.0712890625,
-0.0223388671875,
-0.0322265625,
-0.032470703125,
0.0286865234375,
0.025634765625,
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0.1318359375,
0.08154296875,
0.03369140625,
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-0.0274658203125,
-0.0264892578125,
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Luminosity and
Luminosity and how far away things are
In this class, we will describe how bright a star or galaxy really is by its luminosity.
The luminosity is how much energy is coming from the per second. The units are watts (W).
Astronomers often use another measure, absolute magnitude. Absolute magnitude is ba... | 4 | [
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Equivalence Relations
August 26th 2009, 07:49 AM #1
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Posts
7
Equivalence Relations
I need help to get started with proving the 'only if' part of the following claim:
Let r be a relation. Define ~ to be the intersection of all equivalence relations containing r (So ~ is an equiv... | 4 | [
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... | 34,284 | 34284 | |
Probability on numbers
January 5th 2011, 01:44 PM #1
Newbie
Joined
Jan 2011
Posts
21
Probability on numbers
We randomly select 4 prime numbers without replacement from the first 17 prime numbers. What is the probability that the sum of the four selected numbers is odd? Express answer in common
fracti... | 4 | [
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Journal of the Brazilian Society of Mechanical Sciences and Engineering
Services on Demand
Article
Indicators
Related links
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Print version ISSN 1678-5878
J. Braz. Soc. Mech. Sci. & Eng. vol.34 no.1 Rio de Janeiro Jan./Mar. 2012
http://dx.doi.org/10.1590/S1678-58782012000100013
... | 4 | [
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MathGroup Archive: March 2007 [00912]
[Date Index] [Thread Index] [Author Index]
Re: Definite Integration in Mathematica
• To: mathgroup at smc.vnet.net
• Subject: [mg74656] Re: Definite Integration in Mathematica
• From: "David W.Can... | 5 | [
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Help with a distance problem
December 13th 2012, 07:09 AM #1
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Oct 2012
From
Canada
Posts
15
Help with a distance problem
Dahlai walks from home to school at 2km/h. After school she jogs back home at 6km/h and saves 15 mins. How far away is her house from school? I don't even know how to ... | 4 | [
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Homework Help
Posted by cara on Tuesday, April 19, 2011 at 4:32pm.
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 12 in 9.0 . Assume the merry-go-round is a uniform disk of radius 2.2 and
has a mass of 650 , and two children (each with a ma... | 4 | [
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A question regarding A(S) from baby Herstein
September 21st 2011, 10:49 AM #1
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10
A question regarding A(S) from baby Herstein
I just wanna know if my argument could be written down on my final exam paper as a correct formal argument.
This is the problem: If m<n, show tha... | 5 | [
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3 problems from Calculus
February 26th 2009, 02:22 AM #1
Junior Member
Joined
Feb 2009
Posts
29
3 problems from Calculus
I'm been having some problems with these and I really need the help
1) The number of inflection points for the graph of
y=2x+cos(x^2) in the interval 0≤x≤5 is
the answer... | 5 | [
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Math Help
prove this : $[(1+itg \alpha ) /(1-itg\alpha)]^n=(1+itg (n\alpha))/(1-itg(n\alpha))$ $i$ is for complex numbers
Hi $\left[\frac{1+itg \alpha}{1-itg\alpha}\right]^n=\left[\frac{1+i\frac{\sin\alpha}{\cos\alpha}}{1-i\frac{\sin\alpha}{\cos\alpha}}\right]^n = \left[\frac{\cos\alpha+i\sin\alpha}{\cos\alpha-i\sin\... | 5 | [
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Help Understanding MGFs and Transformations
October 6th 2008, 08:28 PM #1
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Posts
5
I need some help in understanding moment generating functions and transformations of continuous random variables. I've found various webpages that provide pieces of the puzzle, but I can't find
any... | 5 | [
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the encyclopedic entry of thermal radiation
Thermal radiation is electromagnetic radiation emitted from the surface of an object which is due to the object's temperature. Infrared radiation from a common household radiator or electric heater
is an example of thermal radiation, as is the light emitted by a glowing incan... | 4 | [
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Homework Help
Posted by Queta on Tuesday, September 17, 2013 at 12:02pm.
1. Determine the equation of g (x) that results from translating the function f(x)=x^2+5 upward 8 units.
A. g (x)= (x +13)^2
B. g (x)= ( x+8 )^2 +5
C. g (x)= x^2 -3
D. g (x)= x^2+13
I think (D.) is my answer please check over for me.
2. Det... | 4 | [
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search results
Expand all Collapse all Results 1 - 3 of 3
1. CJM 2003 (vol 55 pp. 1100)
Polar Homology
For complex projective manifolds we introduce polar homology groups, which are holomorphic analogues of the homology groups in topology. The polar $k$-chains are subvarieties of complex dimension
$k$ with... | 4 | [
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Numerical Method Using Cubic Trigonometric B-Spline Technique for Nonclassical Diffusion Problems
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 849682, 11 pages
http://dx.doi.org/10.1155/2014/849682
Research Article
Numerical Method Using Cubic Trigonometric B-Spline Technique for Nonclassical Diffusio... | 5 | [
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Equations of tangents through point (curve)
June 17th 2008, 12:52 AM
theowne
Equations of tangents through point (curve)
Determine the exact equations of the tangents to the curve which pass through point P
curve = (8-x)^(1/2)
point = 5,2
I'd like to see how you would solve this. What I tried to do... | 5 | [
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Continued fraction expansion
September 19th 2011, 08:12 AM #1
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Sep 2011
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2
Continued fraction expansion
Hello everyboby.
I am very new here, so please excuse me, if I'm doing something wrong. But I need your help anyway.
There is a dissertation:
http://etd.library.pitt.e... | 5 | [
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