content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Limit calculation without Lhopital's rule
Hi everybody, i have problems with solving these limits without using Lhopital's rule. Problems are in attachment.
Let's start from the limit... $\lim_{x \rightarrow 1} \frac{e^{x}-e}{\sin (x^{2}-1}$ (1) First we construct the Taylor expansions... $e^{x}-e= e\ (x-1)\ \{1 + \fr... | 5 | [
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0.0216064453125,
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0.0033416748046875,
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-0.034423828125,
0.02331542... | 1,800 | 1800 | |
SparkNotes: SAT Chemistry: Hess’s Law
9.1 Enthalpy 9.6 More About Entropy
9.2 Spontaneous Reactions 9.7 Gibb’s Free Energy
9.3 Heat Capacity and Specific Heat 9.8 Practice Questions
9.4 Enthalpies of Reactions 9.9 Explanations
9.5 Hess’s Law
Hess’s Law
The total enthal... | 4 | [
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0... | 1,801 | 1801 | |
Math Help
March 18th 2011, 02:48 PM #1
Junior Member
Joined
Mar 2011
Posts
34
polynomial
I'm asked to simplify
(x+2)^2 (x-1)^2 - (x-4)^2 (x+4)^2
something is wrong with this x^2 +4x +4 +x^2 - 1 -x^2 +16 +x^2 +8x +16
First, you are expanding out the individual terms, but you aren't multipl... | 4 | [
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0.010192871... | 1,802 | 1802 | |
Fluid Mechanics
Posted by Claire on Wednesday, November 3, 2010 at 6:02am.
A cylindrical tank 2m diameter and 4m long with its axis horizontal, is half filled with water and half filled with oil of density 800kg/m^3. Determine the magnitude and position of the net
hydrostatic force on one end of the tank.
The answers... | 5 | [
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Combining Ohm's Laws Formulas
Date: 04/12/2001 at 16:41:14
From: Tony
Subject: Algebraic formulas
I'm studying math for electronics, and we have two main formulas:
V = IR and P = VI. My problem is to combine them to get one formula.
I understand how to make one formula by dividing both sides by the
same letter, like... | 4 | [
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Bernoulli distribution
Suppose you perform an experiment with two possible outcomes: either success or failure. Success happens with probability, while failure happens with probability . A random variable that takes value
in case of success and in case of failure is called a Bernoulli random variable (alternatively, i... | 4 | [
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0.006500244140625,... | 1,805 | 1805 | |
prove or desprove by example
September 3rd 2011, 04:34 AM #16
MHF Contributor
Joined
Oct 2009
Posts
5,502
Thanks
765
Re: prove or desprove by example
I don't think so. Every function which is differentiable and has bounded derivative is uniformly continuous (Wikipedia), and it is possible to have a f... | 5 | [
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I need help solving this 3 variable equation
By solve I mean is there a solution, which I know there isn't, but i want to know how I can show that.
Solution to what? A problem has a solution, not an equation! I suspect that this is the same problem that was posted on another board- in which it was specified that the p... | 4 | [
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Measures of distribution shape
The principal measure of distribution shape used in statistics are skewness and kurtosis. The measures are functions of the 3rd and 4th powers of the difference between sample data values and the
distribution mean (the 3rd and 4th central moments). With sample data, outliers (extreme valu... | 4 | [
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-... | 1,808 | 1808 | |
Cancer dynamics for identical twin brothers
Abstract
In this paper, a new mathematical model is developed to represent the interaction between healthy and cancer cells in the human body, focusing on the role of environmental factors and quality of life
in the progression of cancer. We have investigated the dynamic eff... | 4 | [
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Definition of a Z-Module
August 2nd 2013, 07:20 PM
Bernhard
Definition of a Z-Module
On page 337 Dummit and Foote define a left R-Module (see attached) and then on page 339 they define and describe a $\mathbb{Z}$ module (see attached)
The definition of a $\mathbb{Z}$ module is as foillows:
Let R = $\ma... | 4 | [
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Homework Help
Posted by Imad on Thursday, April 8, 2010 at 12:17am.
Show that the curves (y= √2sinx) and (y=√2cosx) intersect at right angles at a certain point with 0<x<π/2
• calculus - Reiny, Thursday, April 8, 2010 at 12:26am
let's find their intersection points
√2sinx = √2cosx
sinx/cosx = 1
tan... | 5 | [
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Testing of the Difference
Hypothesis Testing of the Difference Between Two Population Proportions
This file is part of a program based on the Bio 4835 Biostatistics class taught at Kean University in Union, New Jersey. The course uses the following text... | 5 | [
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-0.125,
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0.0142211914... | 1,812 | 1812 | |
Quadratic problem
January 15th 2011, 08:29 PM #1
Senior Member
Joined
Jul 2009
From
Melbourne
Posts
272
Thanks
4
Quadratic problem
Thanks, that was pretty simple
Find two quadratic functions f and g such that $f (1) = 0, g(1) = 0$ and $f (0) = 10, g(0) = 10$ and both have a maximum value of ... | 4 | [
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0.048583984375,
-0.006134033203125,
0.01... | 1,813 | 1813 | |
Calculating the hour lines
This is one of a series of articles written for "Clocks" magazine by the late Noel Ta'bois, and reproduced with permission here as a memorial to him.
This article originally appeared in Clocks in April 1986
Geometrical methods of drawing the hour lines of a sundial are well covered in textb... | 5 | [
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0.005... | 1,814 | 1814 | |
Homework Help
Posted by m on Saturday, July 25, 2009 at 6:39am.
can you answer this question:
prove that a number 10^(3n+1), where n is a positive integer, cannot be represented as the sum of two cubes of positive integers.
with out using this method at all
.................................
We will examine the sum... | 4 | [
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0.018310546... | 1,815 | 1815 | |
GMAT question
January 17th 2007, 11:15 AM #1
Newbie
Joined
Jan 2007
Posts
19
GMAT question
Hi everyone,
So for several months I have been busy studying for the GMAT which I'll be taking this coming Saturday. Today I took a prep. test and I am just blown away by how hard it is. The prep test is much
... | 4 | [
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Algebraic
March 1st 2007, 02:45 PM #1
Algebraic
1. The sum of 5 and x divided by the difference of x and 8 and the result is 5.
2. The sum of a number and 7 is equal to twice the difference of the number and 1.
3. Six more than six times a number is 24.
I can't seem to make any of these p... | 4 | [
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0.022827148... | 1,817 | 1817 | |
Quotient or Factor Rings
December 17th 2012, 12:24 AM #1
Quotient or Factor Rings
Can someone help with the following exercise from Beachy and Blair Ch 5 - Commutative Algebra
Show that $Q[x]/ <x^2 - 2> \ \cong \ Q[x] / <x^2 + 4x + 2>$
Re: Quotient or Factor Rings
the ring on the left is better known a... | 5 | [
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How should I approach this problem?
February 19th 2008, 02:49 PM
FalconPUNCH!
How should I approach this problem?
We just started learning about Trigonometric Integrals and I was doing pretty good with the odd numbered ones, until I got to the even. I don't really know how to approach this problem.
$\int_{0... | 5 | [
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Arguments against Reductio ad Absurdum
up vote 1 down vote favorite
Could Reductio ad Absurdum not be consireded a valid proof method? Are there any compelling arguments against it, or at it's favor?
I feel like I am assuming some metamathematical hypothesis about my set of axioms that may not be true, when I use it.... | 4 | [
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0.012... | 1,820 | 1820 | |
Homework Help
Posted by Anonymous on Wednesday, October 29, 2008 at 1:46pm.
Consider the equation:
x^2 - 2xy + 4y^2 = 64
Write an expression of the slope of the curve at any point.
(y^p)= y prime
My work
2x - 2(xy^p + y) + 8yy^p = 0
2x -2xy^p - 2y + 8yy^p = 0
-2xy^p + 8yy^p = 2y -2x
factored out y^p and then d... | 4 | [
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Homework Help
Posted by Anonymous on Thursday, January 24, 2008 at 9:36pm.
The function V=4pir^2 describes the volume of a right circular cylinder of heigh 4ft and radius r feet. Find the (instantaneous) rate of change of the volume with respect to the radius when r=6.
Leave the answer in terms of pi.
• Calculus - ... | 4 | [
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Probability
May 17th 2009, 05:39 PM #1
Member
Joined
Jul 2008
Posts
212
Probability
a) X ~ N(10, 0.25)
Find P(
Find x such that P(
b) X ~ N(20.2, 4)
Find P(
Find x such that P(
If someone could do a) as an example I should be able to do b. Also the
Thanks in advance.
Y... | 5 | [
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Re: st: Pareto v. lognormal
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
Re: st: Pareto v. lognormal
From "Stas Kolenikov" <skolenik@gmail.com>
To statalist@hsphsun2.harvard.edu
Subject Re: st: Pareto v. lognormal
Date Wed, 7 Mar 2007 09:20:43 -0600
Well to be fair to the log... | 4 | [
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c
Divisibility Criteria for 7 and 11
In their exercises on reducing fractions, students are asked to notice that if a number is even it ends in an even digit and if it is divisible by 5 that it ends in a 0 or 5. Students are further
aske... | 4 | [
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Morse Theory and Floer Homology
Marston Morse and Andreas Floer: two major names in the discipline formed by intersecting geometric topology, algebraic topology, and dynamics. Morse was the architect of Morse theory, of course, a
subject whose main thrust is the effective analysis of geometric singularities (very broad... | 4 | [
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Relationships Between Variables, Part 3: Measures of Relationships
Next: Probability Up: Descriptive Statistics Previous: Relationships Between Variables, Part
In this section, we discuss measures of relationships between two variables X and Y. It is easiest to start with no relationship. What do we mean by no ... | 4 | [
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Homework Help
Posted by j on Saturday, December 3, 2011 at 9:38pm.
If the initial concentration of NH3(g) is 4.643 mol/L, calculate the % of NH3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kc at 773.0 K is
16.70. The initial concentration of the reaction product... | 4 | [
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0.07080078125,
-0.0296630859375,
... | 1,828 | 1828 | |
Math Help
Since the question says deduce, I'm not sure if a solution that involves induction is acceptable. Anyway, using induction, We will need to prove: $2\sqrt{n}+\frac{1}{\sqrt{n+1}}<2\sqrt{n+1}$ $\
Leftrightarrow 2\sqrt{n}<\frac{2(n+1)-1}{\sqrt{n+1}}$ $\Leftrightarrow 2\sqrt{n}\sqrt{n+1}<{2n+1}$ $\Leftrightarrow... | 4 | [
0.00970458984375,
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0.04296875,
0.0405273437... | 1,829 | 1829 | |
Summation Closed Forms
February 1st 2009, 01:34 PM #1
Newbie
Joined
Jan 2009
Posts
8
Summation Closed Forms
Find the closed form for:
$\sum_{i=-1}^{n}i$
It's given that the closed form $\sum_{i=1}^{n}i = (n(n+1))/2$ so we can write:
$\sum_{i=-1}^{n}i = (-1) + 0 + \sum_{i=1}^{n}i = (n(n+1))/2... | 4 | [
-0.0908203125,
0.0390625,
0.0859375,
0.04296875,
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0.0157470703125,
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0.02685546875,
0.044189453125,
-0.09033203125,... | 1,830 | 1830 | |
Re: st: passing optional arguments to functions in Mata
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: passing optional arguments to functions in Mata
From Stas Kolenikov <skolenik@gmail.com>
To statalist@hsphsun2.harvard.edu
Subject Re: st: passing optional arguments to fu... | 5 | [
-0.030029296875,
0.07568359375,
0.040771484375,
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0.07958984375,
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-0.051513671875,
0.004608154296... | 1,831 | 1831 | |
Homework Help
Posted by Anonymous on Tuesday, April 24, 2012 at 4:55pm.
Prove that if Sinx=5/13 and Siny=12/13, where x and y angles in Q1, then Sin(x+y)=1
• trig - Bosnian, Tuesday, April 24, 2012 at 5:13pm
sin ( x ) = 5 / 12
cos ( x ) = + OR - sqrt [ 1 - sin ^ 2 ( x ) ]
cos ( x ) = + OR - sqrt [ 1 ... | 4 | [
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... | 1,832 | 1832 | |
Homework Help
Posted by Jossie on Thursday, March 21, 2013 at 4:16am.
evaluate each of the following...sin 75-cos 105-sin 15+cos 15
• mathematics - Reiny, Thursday, March 21, 2013 at 9:49am
I assume you want "exact" answers for these, the usual kind of request for these types of questions.
All your given ... | 4 | [
-0.0751953125,
0.052001953125,
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0.03271484375,
0.05029296875,
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-0.048095703125,
0.0... | 1,833 | 1833 | |
Homework Help
Posted by timmy on Wednesday, September 22, 2010 at 8:48pm.
f(x)= xsquared -2x
for y= absolute value of f(x) does the derivitive exist at x=0 and explain why.
• Hard Calculus - MathMate, Wednesday, September 22, 2010 at 9:17pm
f(x)=|x²-2x|
=x²-2x (-∞,0]U[2,∞)
=-(x²-2x) (0,2)
f'(x)
... | 4 | [
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-0.15... | 1,834 | 1834 | |
Fibonacci: Great Italian Mathematician
The Middle Ages were generally a dark time for most cultural endeavors, but especially for mathematics. Fortunately, around the beginning of the 1200's an Italian by the name of Leonardo Pisano came
along to advanced mathematics significantly - he wrote many books on numerical top... | 4 | [
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0.06079101... | 1,835 | 1835 | |
y'=x-(y^2)sin(y) has unique solution?
March 25th 2009, 02:29 AM #1
Junior Member
Joined
Feb 2008
Posts
36
Thanks
1
y'=x-(y^2)sin(y) has unique solution?
My differential equations is rusted-to-the-point-of-useless, so here's a problem, what I did, and a question about it:
I'm staring at $y'=x-(y^... | 5 | [
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Vector of independent normal RV's - Very difficult for me
August 29th 2009, 05:50 AM #1
Newbie
Joined
Aug 2009
Posts
21
Vector of independent normal RV's - Very difficult for me
Let $X = (X_1,...,X_n)^T$ be a column vector of independent N(0,1) distributed random variables. Let A be an $n \times n$ ortho... | 4 | [
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E5 Lab 5
Upon completion of the lab you should be able to use MATLAB to
• solve linear systems of equations,
• perform iterations with "for" loops,
• simulate some physical systems,
• display simple animations.
At the end of the lab you will turn in a MATLAB script (.m file) with code in several cells (eithe... | 5 | [
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How to tell if three planes are parallel or not
June 3rd 2010, 10:17 PM #1
Senior Member
Joined
Feb 2008
Posts
297
How to tell if three planes are parallel or not
If I have three planes:
$a+3b+2c=5$
$2a+b-c=2$
$7a+11b+4c=13$
How do you determine if the planes are parallel.
And if t... | 5 | [
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-0.04077148... | 1,839 | 1839 | |
arithmetic sequence
September 27th 2008, 09:46 AM #1
Newbie
Joined
Sep 2008
Posts
1
arithmetic sequence
well it gives me a sequence 7,11,15,19 and say calculate the difference between the successive term then asks to determine the formula that generates the sequence. any idea on how to do it or an
ea... | 4 | [
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General solution of differential equation - question 2
August 8th 2011, 05:24 AM #1
Junior Member
Joined
Dec 2010
Posts
61
General solution of differential equation - question 2
I have the question
2) Find the general solution of the following differential equation:
>> dy/dx = y^2 -1/x
i h... | 5 | [
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-0.085... | 1,841 | 1841 | |
Limits of Trignometric Functions
Can someone answer this please. limit as x approaches pi/2 (cotx / (pi/2 - x)) Any help is appreciated thanx.
Have you learned l'hopital's rule? $\lim_{x \to \frac{\pi}{2}} \left(\frac{\cot x}{\frac{\pi}{2} - x}\right) = \left[\frac{0}{0}\right] = \lim_{x \to \frac{\pi}{2}} \left[ \fra... | 5 | [
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0.06445... | 1,842 | 1842 | |
Differential equation word problem
November 3rd 2010, 06:10 AM #1
Member
Joined
Apr 2010
Posts
156
Differential equation word problem
There are 500 students enrolled for a certain course. A rumour starts to spread
among these students that the next class test has been cancelled. Suppose that the rate... | 5 | [
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-... | 1,843 | 1843 | |
Finding horizontal tangent lines
October 15th 2009, 06:42 AM #1
Member
Joined
Oct 2009
Posts
79
Finding horizontal tangent lines
1. find each value of x at which $f(x) =x(2x-8)^3$ has a horizontal tangent line.
$y'=(2x-8)^3 + 6x(2x-8)^2$
set = to 0
$(2x-8)^3 + 6x(2x-8)^2=0$
factoring o... | 4 | [
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-0.030883789... | 1,844 | 1844 | |
Column Adsorption, contin
Column Adsorption, continued
A practical way to design an adsorption column is to experiment with a laboratory column. If it is roughly the same length as the length of a full size column and of sufficient diameter to minimize
wall effects, scale up is merely a matter of increasing the area t... | 4 | [
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0.0578613281... | 1,845 | 1845 | |
Plot condition number of Hilbert matrix against matrix size n.
March 16th 2009, 01:02 AM
adashiu
Plot condition number of Hilbert matrix against matrix size n.
Plot condition number of Hilbert matrix against matrix size n. Propose set of linear equations with Hilbert matrix of coefficients and with solution http... | 5 | [
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-0.0039978027343... | 1,846 | 1846 | |
Measurement Practice Problems
1. What will it cost to carpet a room with indoor/outdoor carpet if the room is 10 feet wide and 12 feet long? The carpet costs 12.51 per square yard.
A. $166.80
B. $175.90
C. $184.30
D. $189.90
E. $192.20
2. If the perimeter of a rectangular house is 44 yards, and the length is 36... | 4 | [
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0.056640625,... | 1,847 | 1847 | |
Word numbers, Part 3: Binary search
We return to ITA Software’s “word numbers” problem, continuing our work in part 1 and part 2. As before, you can download this post as a program.
{-# OPTIONS -W -fglasgow-exts #-}
module WordNumbers3 where
import WordNumbers1
import WordNumbers2
import Prelude h... | 5 | [
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-0.040283203125,
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-0.00341796875,
-0.0712890625,
-0.021... | 1,848 | 1848 | |
Homework Help
Posted by Abigail on Thursday, March 1, 2007 at 7:40pm.
How do you prove area of a circle?
Integrate an incremental area
dArea = r dr dTheta from r=0 to R, and Theta from zero to 2PI radians.
Area= INT INT dTheta rdr dTheta
Area= 2PI (1/2 R^2)= PI R^2
Related Questions
8th grade math - circle A has... | 4 | [
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0.004791259765625,
-0.0019378662109375,
-0.... | 1,849 | 1849 | |
Big O examples
August 1st 2010, 04:04 PM #1
Junior Member
Joined
Jul 2010
Posts
29
Big O examples
Hi didn't really know where this belongs so here goes...
show that $log_eN^c=O(N) \forall c \in \mathbb{R}\setminus{0}$
and
find O(f(x)) for $f(x) = x^4 + 2^x + log_en$
Thanks a lot for t... | 5 | [
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0.00567626953125,
-0.0859375,
-0.0030059814453125,
-0.052978515625,
0.017822... | 1,850 | 1850 | |
questionable questions
February 3rd 2010, 01:10 PM #1
Newbie
Joined
Feb 2010
Posts
12
questionable questions
Greetings and salutations!
I have some questions that I can't figure out.
1
the perimeter of a rectangular yard is 290 feet. If its length is 25 feet greater than its width, what are... | 4 | [
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0.11083984375,
-0.045654296875,
-0.0236816... | 1,851 | 1851 | |
Posts by
Total # Posts: 117
physics
How the spring is connected to the block?
Physics
Because Torque is a cross product of radius vector(r) and Force vector(F). If r =Ax+By+Cz & F = ax+by+cz (where x,y and z are unit vectors in x,y and z directions) then x-component of torque Tx is :
Tx = (Bc-Cb) = 3*0-3*4 = -12 The... | 5 | [
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-0.0634765625,
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0.0264892578125,
0.007568359375,
-0.01245... | 1,852 | 1852 | |
Prove that group of order 15 is cyclic
April 9th 2011, 06:47 AM #1
Junior Member
Joined
Feb 2010
Posts
45
Prove that group of order 15 is cyclic
Prove that a group of order 15 is abelian, and in fact cyclic.
Let $G$ be a group of order 15.
By Cauchy, $\exists a \in G$ such that period of $a = 3$... | 5 | [
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0.0556640625,
0.0341796875,
0.00970458984375,
0.0050... | 1,853 | 1853 | |
Population
October 17th 2009, 10:33 AM #1
Member
Joined
Nov 2006
From
San Francisco
Posts
145
Population
Hello, I am having trouble solving this problem exactly. I used a 20 population difference both ways at t=1 and t= -1 to approximate the answer but it is still not right. The answer is 484
rab... | 4 | [
0.0311279296875,
0.0242919921875,
0.07568359375,
0.04248046875,
-0.060791015625,
-0.03515625,
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0.0419921875,
0.0289306640625,
0.11328125,
0.1337890625,
0.006103515625,
0.025390625,
0.06982421875,
0.0277099609375,
0.025390625,
-0.0211181640625,
-0.06640625,
-0.0065... | 1,854 | 1854 | |
inverse laplace transform
How to show that $L^{-1} [\frac{6}{(s^2+2s+2)^2}]=3\exp(-t)sin(t)-3t\exp(-t)cos(t)$ where $L^{-1}[F(s)] = f(t)$ is the inverse laplace ? Ty
$\mathcal{L}\{3e^{-t}\sin t-3e^{-t}\cos t\}=3\mathcal{L}\{e^{-t}\sin t\}-3\mathcal{L}\{e^{-t}\cos t\}$ . Now use $\mathcal{L}\{e^{-at}\sin bt\}=\frac{b}{... | 5 | [
-0.05712890625,
0.0081787109375,
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0.0166015625,... | 1,855 | 1855 | |
Vertical Integration
October 16th 2010, 09:14 AM #1
Newbie
Joined
Oct 2010
Posts
9
Vertical Integration
Here is the problem:
To illustrate the double marginalization problem, let’s assume that a manufacturer, m, and a retailer, r, use linear pricing
Inverse demand: p = 10 - q
Marginal cost o... | 4 | [
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0.1279296875,
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0.09619140625,
0.0228271484375,
0.0639648437... | 1,856 | 1856 | |
Homework Help
Posted by ken on Friday, October 31, 2008 at 6:37pm.
suppose a pair of dice is rolled. Consider the sums of numbers on the top of the dice. Find the probabilities:
a) P(5, given that the sum are odd)
b) P(odd, given that the sum rolled is 5)
c) P(7, given that one of the dice rolled was odd)
• math... | 4 | [
-0.07080078125,
-0.0086669921875,
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-0.03125,
-0.050537109375,
-0.005218505859375,
-0.03173828125,
-0.054687... | 1,857 | 1857 | |
Homework Help
Posted by Nika on Thursday, November 11, 2010 at 9:05pm.
How many cubic units are in the volume of a cylinder whose height is four units and whose radius is five units?
What is the surface area of a cube whose volume is 27 cubic inches?
• Math - jai, Thursday, November 11, 2010 at 9:13pm
Volume ... | 4 | [
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Methods in Ecology and Evolution
You have free access to this content
Do not log-transform count data
1. Robert B. O’Hara^1,* and
2. D. Johan Kotze^2
Article first published online: 24 MAR 2010
DOI: 10.1111/j.2041-210X.2010.00021.x
Issue
Methods in Ecology and Evolution
Additional Information
How to Cite
O’H... | 4 | [
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First-order nonlinear ODE (approach is not clear to me)
October 18th 2010, 06:58 PM
Rafael Almeida
First-order nonlinear ODE (approach is not clear to me)
I've been given the following ODE to be solved:
$(yx^2)y' + (2y^2x + 3x^3) = 0$
But I don't really know how to start. A direct integration is (obvio... | 5 | [
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-0.00... | 1,860 | 1860 | |
or Linear Equations
Standard Form For Linear Equations
This page assume that the reader understands the following concepts:
1. The coordinate plane.
2. Graphing lines on the coordinate plane.
3. Slope and y-intercept for linear equations.
4. Slope-intercept form for linear equations, y = m x + b.
5. Point-Slope ... | 4 | [
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0.0319824... | 1,861 | 1861 | |
Which group modulo the additive reals is isomorphic to the multiplicative reals.
May 14th 2010, 01:40 AM
Kep
Which group modulo the additive reals is isomorphic to the multiplicative reals.
Hi There.
Simple question to pose, maybe not too easy to answer.
Let G be a group such that it's quotient over th... | 5 | [
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-0.061279296875,
0.06591796875,
0.0839843... | 1,862 | 1862 | |
Posts by
Total # Posts: 23,961
Trig
The angle is θ, where tanθ = (173-5)/50
statistics
75 is 5 std from the mean of 60, so 1 std must be 3.
Test and Measures
In that case, you need to review what the Z table means. Without that, you have no context. A Z score of zero means that the value is 0 std away from the mean... | 5 | [
0.00958251953125,
0.05224609375,
-0.08056640625,
-0.049072265625,
0.005126953125,
0.03662109375,
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0.0634765625,
-0.02001953125,
-0.01031494140625,
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-0.07275390625,
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0.034912109375,
-0.015625,
-0.033447265625,
-0.0286865234375,
-0.02624... | 1,863 | 1863 | |
Help with this separable differential equation problem
January 29th 2009, 07:31 AM #1
Junior Member
Joined
Sep 2008
Posts
42
Help with this separable differential equation problem
In the elementary chemical reaction, single molecules of two reactants A and B form a molecule of the product C: A + B -> C. ... | 4 | [
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-0.031982421875,
0.03393... | 1,864 | 1864 | |
Logarithms: The Early History of a Familiar Function - Joost Bürgi Introduces Logarithms
At about the same time in Switzerland, Joost Bürgi, a court clock maker by profession, grappled with the same issues of computation. Bürgi's key motivation was not only to facilitate computation, but
also to produce a single table ... | 5 | [
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-0.00738525390625,
-0.1689453125,
0.09... | 1,865 | 1865 | |
Ledyard Public Schools - Curriculum
Integrated Mathematics II
Unit 7: Surface Area and Volume
Abstract
This unit focuses on three-dimensional geom... | 4 | [
0.05078125,
-0.034423828125,
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-0.08154296875,
-0.017333984375,
0.057... | 1,866 | 1866 | |
Intersection of an arbirary plane and sphere
April 18th 2011, 09:07 PM #1
Member
Joined
Sep 2009
Posts
75
Thanks
1
Intersection of an arbirary plane and sphere
Hello,
Consider the following two equations:
1. ax + by + cz = 0.
2. x^2 + y^2 + z^2 = r^2
The curve of intersection is a ... | 5 | [
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... | 1,867 | 1867 | |
Characteristic subgroups are normal
December 9th 2011, 03:08 PM
Bernhard
Characteristic subgroups are normal
Can anyone please help with the following problem from Dummit and Foote:
================================================== =======================
Prove that characteristic subgroups are normal... | 5 | [
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0.05322265625,
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-0.0213623046875,
... | 1,868 | 1868 | |
2nd order differential equation problem
August 26th 2011, 12:17 PM #1
2nd order differential equation problem
I just wanted to confirm I did this right.
"Verify by substitution that the given function is a solution of the given differential equation."
Given:
x^2 y'' - xy' + 2y = 0
y = x*cos( ln(... | 5 | [
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... | 1,869 | 1869 | |
Volume of Water in a swimming pool
January 9th 2011, 05:48 PM #1
Member
Joined
Nov 2010
Posts
97
Volume of Water in a swimming pool
A rectangular swimming pool is 30 ft wide and 50 ft long. The table below shows the depth h(x) of the water at 5-ft intervals from one end of the pool to the other. Estimate... | 4 | [
-0.0458984375,
0.107421875,
0.029296875,
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0.033935546875,
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0.078125,
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0.03759765625,
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0.0220947265625,
-0.067871... | 1,870 | 1870 | |
Review
Review of Homogeneous and Particular Solutions
The method of undetermined coefficients
In E12 we will extend what you learned in E11, but it will be more general. We will look at linear, time-invariant, continuous time, continuous variable, lumped parameter, dynamic physical systems.
We will develop models for ... | 4 | [
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-0.1103515625,
0.013549804687... | 1,871 | 1871 | |
Solving 2D Poisson problem with single series solution.
March 18th 2010, 11:02 AM #1
Junior Member
Joined
Nov 2009
Posts
58
Solving 2D Poisson problem with single series solution.
Conventional solution of Poission’s equation involve solution $u(x,y)= \sum_{n=1}^{\infty} \sum_{m=1}^{\infty}E_{mn} sin(\fra... | 4 | [
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-0.0976... | 1,872 | 1872 | |
he Ba
┏━━━━━━━━━━━━━━━━━━━━┓
┃ ┃
┃ a... | 4 | [
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-0.018310546875,
0.1337890625... | 1,873 | 1873 | |
Implicit differentiation
March 2nd 2010, 05:37 AM #1
Newbie
Joined
Mar 2010
Posts
5
Hello people,
This question just doesnt help me at all!
4x^4 + 8xy - 16y = 14
using implicit differentiation,
I had (y+2x^2) / (x-2)
but the answer was different!!!
Help me out please
Tha... | 5 | [
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0.0400390625,
-0.0517578125,
-0.07226562... | 1,874 | 1874 | |
matrix multiplication help?
November 18th 2012, 04:42 PM #1
Junior Member
Joined
Sep 2012
From
halo
Posts
48
matrix multiplication help?
Let e[j] denote the jth unit column that contains a 1 in the jth
position and zeros everywhere else. For a general matrix A[n×n], describe the following product... | 5 | [
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0.0174560546875,
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-0.0079345703125,
-0.0113525390625,
0.10205078125,
-0.04296875,
0... | 1,875 | 1875 | |
Help with binomial distribution
November 17th 2012, 01:13 PM
Ceidon
Help with binomial distribution
In a particular city, it is believed that 30% of people who
are eligible to vote there, support the Liberal Democrat party.
If 31 people (who are eligible to vote there) are selected at random, what is
... | 5 | [
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-0.072265625,
0.0888671875,
0.0458984375,
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0.044677734375,
0.142578125,
0.01116943359375,
-0.046875,
-0.06738281... | 1,876 | 1876 | |
Critical Depth
Register to enable "Calculate" button.
Critical depth calculation is mobile-device-friendly as of October 30, 2013.
Units in critical depth calculation: cm=centim... | 4 | [
-0.083984375,
-0.099609375,
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-0.064453125,
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-0.0458984375,
-0.015869140625,
0.0194091796875,
-0.044921875,
-0.065429687... | 1,877 | 1877 | |
Closed line integral along a curve symmetric about the X and Y axes
April 8th 2010, 03:36 PM #1
Closed line integral along a curve symmetric about the X and Y axes
From the defintion of a closed Line Integral we know that if the F (vector) is conservative that the integral will = 0, and will always be indipendent... | 4 | [
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-0.06396484375,
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0.0098876953125,
-0.09375,
0.0263671875,
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0.046630859375,
-0.039794921875,
0.0537109375,
-0.091796875,
-0.0610351562... | 1,878 | 1878 | |
Homework Help
Posted by sara on Wednesday, October 17, 2007 at 9:49pm.
A conical tank( with vertex down) is 10 feet across the top and 18 feet deep. As the water flows into the tank, the change is the radius of the water at a rate of 2 feet per minute, find the rate of
change of the volume of the water when the radius... | 4 | [
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0.00921630859375,
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0.1171875,
0.004730224609375,
0.00872802734375,
-0.0732421875,
0.0537... | 1,879 | 1879 | |
HELP!? Vector Riddle, anybody up for solving this problem? I've given up.
June 18th 2010, 10:58 AM #1
This question involves 3 dimensions, but I will start in 2 dimension to get a better fit explaination. Its been bothering me for a couple days and I've been unsuccesful as getting an simple
answer (I am able t... | 5 | [
-0.0194091796875,
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0.0361328125,
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0.0089111328125,
-0.023193359375,
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0.036376953125,
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-0.0201416015625,
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-0.0076904296875,
-0.0234375,
... | 1,880 | 1880 | |
Fix columns for sumproduct
"Dougal Ross" <(E-Mail Removed)> wrote:
> I have 2 formulas I am using to look for conditions in my data.
> One to find when one of two criteria is met:
> =SUMPRODUCT((V4:V20>1.05)+(X4:X20>8.05))
>
> and one to find when BOTH criteria are met:
> =SUMPRODUCT(--(V4:V20>1.05),--(X4:X20>8.05))
>
... | 5 | [
-0.0235595703125,
0.031005859375,
0.0654296875,
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-0.00860595703125,
0.01336669921875,
0.06640625,
0.03515625,
-0.043701171875,
0.00531005859375,
0.0263671875,
-0.035400390625,
0.091796875,
0.0142822265625,
0.016357421875,... | 1,881 | 1881 | |
The natural logarithmic function and differentiation?
August 28th 2011, 08:03 AM #1
Senior Member
Joined
Dec 2010
From
CPT
Posts
302
The natural logarithmic function and differentiation?
Can anybody show me how to find the derivative of this function
((-square root(x^2+1))/((x))+ln((x+square roo... | 5 | [
-0.014892578125,
-0.032958984375,
0.08056640625,
0.008056640625,
0.0169677734375,
-0.07373046875,
-0.02490234375,
0.01153564453125,
0.05517578125,
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0.1416015625,
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0.006805419921875,
0.068359375,
-0.0830078125,
-0.0072021484375,
-0.076171875,
0.0011444... | 1,882 | 1882 | |
robability
Probability
Outcome Mutually Exclusive Events
Sample Space Addition Rule
Event Multiplication Rule
Relative Frequency Conditional Probability
Probability Law of Total Probability
Subjective Probability Bayes' Theorem
Independent Events
... | 4 | [
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-0.03564453125,
-0.04150390625,
0.0400390625,
-0.020751953125,
0.07861328125,
0.048095703125,
0.12890625,
0.06298828125,
0.048095703125,
-0.040283203125,
0.119140625,
-0.0211181640625,
0.0247802734375,
-0.04736328125,
0.0133056640625,
0.03295898437... | 1,883 | 1883 | |
Suppose Your Bank Account Will Be Worth 15 000 00 In One Year The Interest Rate Discount Rate That The Bank Pays Is 7 What Is The Present Value Of Your
•
the interest rate is 7 percent? What is the present value of these cash flows? Annuity Present Value You are looking into an investment that will pay you ... | 5 | [
-0.0106201171875,
0.07763671875,
-0.0216064453125,
-0.02587890625,
-0.0157470703125,
0.01141357421875,
0.06787109375,
0.0830078125,
0.028564453125,
0.0478515625,
-0.004180908203125,
-0.08251953125,
-0.016357421875,
0.056640625,
0.00104522705078125,
0.0341796875,
-0.064453125,
-0.01... | 1,884 | 1884 | |
AP CALCULUS PLEASE HELP DUE TOMORROW!
Posted by Adam on Sunday, December 12, 2010 at 8:59pm.
5. What are the dimensions of the lightest open-top right circular cylindrical can that will hold a volume of .8L?
• AP CALCULUS PLEASE HELP DUE TOMORROW! - drwls, Sunday, December 12, 2010 at 10:04pm
That depends upon... | 4 | [
0.0260009765625,
0.040771484375,
-0.0108642578125,
0.010986328125,
-0.00958251953125,
-0.040771484375,
-0.0101318359375,
0.10595703125,
-0.0257568359375,
0.01129150390625,
-0.0751953125,
-0.0059814453125,
0.06396484375,
0.0673828125,
0.00164794921875,
-0.0250244140625,
-0.05224609375... | 1,885 | 1885 | |
Wolfram Demonstrations Project
Gamow Model for Alpha Decay: The Geiger-Nuttall Law
Alpha emission is a radioactive process involving two nuclei X and Y, which has the form , the helium-4 nucleus being known as an alpha particle. All nuclei heavier than Pb () exhibit alpha
activity. Geiger and Nuttall (1911) found an e... | 4 | [
-0.046142578125,
-0.025146484375,
-0.055419921875,
0.05859375,
0.04248046875,
-0.00384521484375,
-0.0118408203125,
0.060791015625,
-0.039306640625,
0.10302734375,
0.04443359375,
0.01495361328125,
-0.0556640625,
0.02783203125,
0.021240234375,
-0.01708984375,
-0.01116943359375,
-0.11... | 1,886 | 1886 | |
Homework Help
Posted by Barb on Tuesday, March 26, 2013 at 11:41am.
Prove: If the hypotenuse and an acute angle of one triangle are congruent respectively to the hypotenuse and an acute angle of another right triangle, then the two triangles are congruent.
• Math - bobpursley, Tuesday, March 26, 2013 at 12:03pm
... | 4 | [
-0.119140625,
0.0654296875,
0.04052734375,
-0.044921875,
-0.0184326171875,
0.011474609375,
0.0115966796875,
0.0654296875,
0.004669189453125,
0.007537841796875,
0.04296875,
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0.00775146484375,
0.03173828125,
0.0732421875,
-0.0927734375,
-0.0927734375,
-0.047607421... | 1,887 | 1887 | |
SBMS
KL7UW
Worksheet for OVRO / SBMS EME Test
SBMS Announces negotiations with Owens Valley Radio Observatory for conducting
EME Test... | 4 | [
0.06982421875,
-0.053955078125,
-0.0225830078125,
0.049072265625,
-0.02734375,
-0.0791015625,
-0.04345703125,
-0.0079345703125,
-0.0216064453125,
-0.00035858154296875,
-0.045166015625,
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0.01611328125,
-0.033203125,
0.048828125,
0.032470703125,
0.115234375,
-0.091308... | 1,888 | 1888 | |
Math Help
if p and 8p-1 are prime, prove 8p+1 is composite.
Prime numbers are of the form p = 6k + 1 or p = 6k - 1. If p = 6k + 1, 8p + 1 = 48k + 9 = 3(16k + 3). Thus 8p + 1 has 3 as factor. 8p + 1 = 3 is a contradiction since p is prime. Couldn't figure out
p = 6k - 1 yet, but maybe you could do it this way? EDIT ED... | 4 | [
-0.051025390625,
-0.00823974609375,
0.05517578125,
0.033935546875,
0.0390625,
0.037353515625,
0.06396484375,
0.07470703125,
-0.040283203125,
-0.068359375,
-0.03955078125,
0.01397705078125,
0.1025390625,
0.001556396484375,
-0.05810546875,
-0.053466796875,
-0.06591796875,
0.024414062... | 1,889 | 1889 | |
Differential equation check?
May 19th 2009, 06:25 AM #1
Member
Joined
Sep 2007
Posts
76
Differential equation check?
COuld someone check this out for me and see if If done this right..
I'm worried incase I went wrong somewhere...
$<br /> \begin{gathered}<br /> 4\frac{{d^2 y}}<br /> {{dx^2 }} + 8... | 4 | [
-0.06689453125,
-0.00872802734375,
-0.0286865234375,
-0.0303955078125,
0.0011444091796875,
0.0087890625,
-0.0233154296875,
0.00628662109375,
0.0255126953125,
-0.019775390625,
0.09912109375,
-0.103515625,
-0.0146484375,
0.029541015625,
0.0439453125,
-0.0123291015625,
-0.06396484375,
... | 1,890 | 1890 | |
30 people, 365 days, birthday
November 22nd 2011, 03:25 AM #1
Member
Joined
Dec 2008
Posts
152
30 people, 365 days, birthday
There is 30 people in a group (29 + you).
What's the probabillity that one of them has the exact same birthday as you?
This is what I've got thus far. I have no idea how t... | 4 | [
0.04296875,
-0.0184326171875,
0.01025390625,
0.0240478515625,
-0.041015625,
-0.0703125,
0.0869140625,
-0.038818359375,
-0.0595703125,
0.0069580078125,
0.059326171875,
-0.12109375,
0.052490234375,
0.03173828125,
0.061767578125,
0.020263671875,
-0.08740234375,
0.0272216796875,
-0.0... | 1,891 | 1891 | |
Nonlinear dynamic systems in the geosciences
Kansas Geological Survey, Bulletin 233, p. 33-42
Nonlinear dynamic systems in the geosciences
... | 4 | [
-0.039306640625,
-0.01141357421875,
0.111328125,
0.044189453125,
-0.1513671875,
-0.09814453125,
-0.049072265625,
-0.02685546875,
0.07177734375,
0.0059814453125,
-0.052978515625,
-0.0478515625,
0.003631591796875,
-0.07373046875,
-0.02490234375,
-0.032958984375,
-0.07568359375,
-0.01... | 1,892 | 1892 | |
Convert 2nd order ode to first order ODES
May 30th 2010, 04:32 PM #1
Newbie
Joined
Aug 2009
Posts
21
Convert 2nd order ode to first order ODES
Hello,
I have the DE:
$y''(t) + y = 0$
with IC's:
$y'(0) = 1$hs
$y(0) = 0$
If I convert this to a system of 1st order ODES is it just... | 5 | [
-0.14453125,
-0.024658203125,
0.06005859375,
0.04248046875,
0.07177734375,
-0.019775390625,
-0.0556640625,
0.060546875,
0.041259765625,
-0.0220947265625,
0.1318359375,
-0.07763671875,
0.01068115234375,
-0.009521484375,
0.04638671875,
-0.01904296875,
-0.03076171875,
0.00582885742187... | 1,893 | 1893 | |
Math Help
April 18th 2008, 02:29 PM #1
Newbie
Joined
Apr 2008
Posts
12
Derivatives
Suppose that we have two functions, f(x) and g (x), and that
□ f (3) = 4,
□ g (3) = 5,
□ f '(3) = -4, and
□ g '(3) = 5.
Calculate the values of the following derivatives when x is equal to 3.
... | 5 | [
-0.06640625,
-0.058837890625,
0.036376953125,
-0.04296875,
-0.068359375,
-0.0830078125,
0.0120849609375,
-0.0196533203125,
0.049072265625,
0.07373046875,
0.07080078125,
-0.0693359375,
-0.01348876953125,
0.001861572265625,
0.006134033203125,
0.037109375,
-0.00970458984375,
0.1137695... | 1,894 | 1894 | |
Math Help
July 25th 2010, 06:19 AM #1
Newbie
Joined
Jul 2010
Posts
3
Help
y= ln x / x
Find dy/dx
Hence show (integral sign with e^2 at top and e at bottom) 1-ln x / x ln x = ln 2 - 1
Last edited by mr fantastic; July 25th 2010 at 12:40 PM. Reason: Restored deleted question.
Using the... | 5 | [
0.01422119140625,
0.030517578125,
0.11669921875,
-0.020751953125,
0.0703125,
-0.048828125,
-0.01904296875,
0.0076904296875,
-0.0400390625,
-0.0179443359375,
-0.019287109375,
-0.05615234375,
-0.01708984375,
0.0302734375,
-0.051513671875,
0.0380859375,
-0.04248046875,
-0.014099121093... | 1,895 | 1895 | |
preimage of a continous function is an interval
October 3rd 2013, 07:34 PM #1
Junior Member
Joined
May 2010
Posts
63
preimage of a continous function is an interval
To prove: a continuous real-valued function (f) defined on set S has an image (S') that is an interval then S must be an interval.
Tool... | 5 | [
0.00299072265625,
0.0306396484375,
-0.048583984375,
-0.03369140625,
-0.036865234375,
0.12109375,
-0.0277099609375,
0.07080078125,
-0.014404296875,
0.0159912109375,
-0.06494140625,
-0.0233154296875,
0.111328125,
0.053466796875,
0.0299072265625,
-0.017578125,
0.05126953125,
-0.026000... | 1,896 | 1896 | |
Sum of the series
September 7th 2012, 12:25 PM #1
Junior Member
Joined
Aug 2012
From
The Earth
Posts
71
Thanks
1
Sum of the series
∑_(r=1)^n▒2/r(r+1)(r+2)
∑_(r=1)^n▒r/((2r-1)(2r+1)(2r+3))
I first convert both to partial fraction.
Then i use the method of differences to cancel off ter... | 4 | [
-0.0830078125,
0.034423828125,
0.044921875,
0.03271484375,
0.06689453125,
-0.01531982421875,
-0.08984375,
0.0140380859375,
0.033447265625,
0.033935546875,
-0.07080078125,
-0.0859375,
-0.034912109375,
0.042236328125,
-0.0341796875,
-0.06982421875,
0.031005859375,
-0.047119140625,
... | 1,897 | 1897 | |
Statistics Psychology
Posted by Kailey on Tuesday, May 10, 2011 at 4:13pm.
I do not understand how to find the critical values of the test statistics.
I also need help understanding how to find the standard error as well.
Thank you!
• Statistics Psychology - MathGuru, Tuesday, May 10, 2011 at 5:32pm
You can ... | 4 | [
0.076171875,
0.05078125,
-0.00020599365234375,
0.031982421875,
-0.0228271484375,
-0.010986328125,
-0.041015625,
0.14453125,
-0.02880859375,
0.11767578125,
0.0030364990234375,
-0.10888671875,
0.0296630859375,
-0.0034942626953125,
0.046142578125,
-0.06787109375,
0.020263671875,
-0.07... | 1,898 | 1898 | |
st: Re: chi2 test for linear trend for repeated data
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
st: Re: chi2 test for linear trend for repeated data
From Joseph Coveney <jcoveney@bigplanet.com>
To Statalist <statalist@hsphsun2.harvard.edu>
Subject st: Re: chi2 test for linear ... | 4 | [
-0.04345703125,
-0.08642578125,
0.0089111328125,
0.002716064453125,
0.0079345703125,
0.09228515625,
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-0.04833984375,
-0.043701171875,
0.09228515625,
0.11279296875,
0.041259765625,
0.00049591064453125,
0.062255859375,
0.0859375,
-0.04443359375,
-0.045166015625,
0.0402... | 1,899 | 1899 |