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Evgeny.Makarov
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Today,
21:33
MarkFL
replied to a thread
15.1.25 Evaluate the following double integral over the region R
in
Calculus
The region $R$ is a rectangle having the vertices: (0,1),\,(1,1),\,(1,-1),\,(0,-1) One way we can compute the volume is: ...
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4 replies | 53 view(s)
Today,
19:41
MarkFL
replied to a thread
logs
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Pre-Algebra and Algebra
Okay, we are given: \ln\left(x-\frac{1}{x}-3\right)=2 Converting from logarithmic to exponential form, we have: x-\frac{1}{x}-3=e^2 ...
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1 replies | 15 view(s)
Today,
15:26
MarkFL
replied to a thread
15.1.25 Evaluate the following double integral over the region R
in
Calculus
As for the $\LaTeX$, look under the "Calculus/Analysis" section of our Quick $\LaTeX$ tool. You will find it, which gives the code: ...
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4 replies | 53 view(s)
Today,
10:48
MarkFL
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The Fonz and Geometry
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Yes, and I was just pointing out that there can be other reasons a student fails besides lack of innate ability to understand the material, or an...
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5 replies | 63 view(s)
Today,
10:18
MarkFL
replied to a thread
The Fonz and Geometry
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If a child's parents consistently put a child down, then I think this can have negative consequences on the child. I think there are a great many...
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5 replies | 63 view(s)
Yesterday,
23:08
MarkFL
replied to a thread
Students Fear Word Problems
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I disagree with this...I think it is the societal attitude that it's okay to fail at math that is part of the problem. Someone says to their friends,...
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9 replies | 94 view(s)
Yesterday,
22:23
MarkFL
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Probability of 3 people ending up on same team?
in
Basic Probability and Statistics
If we have 2000 people, 300 of which are women, then the probability that all 300 women will be on the same team is given by: P(A)=\frac{{1700...
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5 replies | 51 view(s)
Yesterday,
22:01
MarkFL
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Probability of 3 people ending up on same team?
in
Basic Probability and Statistics
I think your second method is correct. Suppose we call the teams $X$ and $Y$...and now we need only look at one team, so let's look at team $X$. If...
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5 replies | 51 view(s)
Yesterday,
19:04
MarkFL
replied to a thread
Solar Eclipse 2017
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Yesterday during the big event, we had pervasive heavy cloud cover and intermittent rain. Today, sunny and clear all day. Story of my life...(Giggle)
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8 replies | 233 view(s)
August 21st, 2017,
23:30
Peter
replied to a thread
Limits of Sequences ... Bartle and Shebert, Example 3.4.3 (b) ...
in
Analysis
Thanks Opalg ... but ... can you indicate how we prove that z_n \gt 1 ... ? Peter
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4 replies | 70 view(s)
August 21st, 2017,
06:40
Peter
started a thread
Limits of Sequences ... Bartle and Shebert, Example 3.4.3 (b) ...
in
Analysis
I am reading "Introduction to Real Analysis" (Fourth Edition) b Robert G Bartle and Donald R Sherbert ... I am focused on Chapter 2: Sequences and...
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4 replies | 70 view(s)
August 20th, 2017,
01:29
MarkFL
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Hey Peter! (Wave) I edited your post to remove the duplicate content. Sorry for the late reply, I was busy "powering through" a tedious 3 hour...
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August 20th, 2017,
00:43
Peter
replied to a thread
Ordering on the Set of Real Numbers ... Sohrab, Exercise 2.1.10 (c) ...
in
Analysis
Thanks for the help, Euge ... An attempt to follow your advice follows ... To show that n \in \mathbb{N} \Longrightarrow n \gt 0 ... ... ......
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3 replies | 80 view(s)
August 20th, 2017,
00:15
Peter
replied to a thread
Ordering on the Set of Real Numbers ... Sohrab, Exercise 2.1.10 (b) ...
in
Analysis
Hmm ... you are right, of course ... and, indeed, the solution using Part (a) seems obvious ... ... ... don't know how I missed it ... :(... ...
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5 replies | 96 view(s)
August 19th, 2017,
06:33
evinda
replied to a thread
Check if N is composite
in
Number Theory
(Nod) Oh yes, that's what I meant. I wrote the time complexity when using the repeated squaring trick. I understand... (Smile)
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18 replies | 383 view(s)
August 19th, 2017,
05:18
Peter
replied to a thread
Ordering on the Set of Real Numbers ... Sohrab, Exercise 2.1.10 (b) ...
in
Analysis
Thanks for the help, Euge ... I now have a way now to prove that 1 \gt 0 but I am concerned because it involves what Sohrab lists as a subsequent...
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5 replies | 96 view(s)
August 18th, 2017,
05:06
Peter
started a thread
Ordering on the Set of Real Numbers ... Sohrab, Exercise 2.1.10 (c) ...
in
Analysis
I am reading Houshang H. Sohrab's book: "Basic Real Analysis" (Second Edition). I am focused on Chapter 2: Sequences and Series of Real Numbers...
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3 replies | 80 view(s)
August 18th, 2017,
03:11
Peter
started a thread
Ordering on the Set of Real Numbers ... Sohrab, Exercise 2.1.10 (b) ...
in
Analysis
I am reading Houshang H. Sohrab's book: "Basic Real Analysis" (Second Edition). I am focused on Chapter 2: Sequences and Series of Real Numbers...
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5 replies | 96 view(s)
August 18th, 2017,
02:51
Peter
replied to a thread
Ordering on the Set of Real Numbers ... Sohrab, Exercise 2.1.12 ...
in
Analysis
I think I have made some progress with showing that \frac{a}{2} \gt 0 ... We have 2 \gt 0 (can we say this? How is this justified?) and so...
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2 replies | 47 view(s)
August 18th, 2017,
00:25
Peter
replied to a thread
Ordering on the Set of Real Numbers ... Sohrab, Exercise 2.1.10 (1) ...
in
Analysis
After a little reflection ... I have come to the following solution ... To show that a \in \mathbb{R} \ \{ 0 \} \Longrightarrow a^2 \gt 0 ......
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2 replies | 63 view(s)
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August 18th, 2017
07:52 -
Evgeny.Makarov
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Re: How do I merge two age groups per 10k from an abortion rate table?
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I like Serena
However, I am not sure...
August 17th, 2017
13:52 -
lfdahl
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Re: How do I merge two age groups per 10k from an abortion rate table?
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Evgeny.Makarov
Let us introduce some...
11:57 -
I like Serena
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Re: How do I merge two age groups per 10k from an abortion rate table?
by
Evgeny.Makarov
Let us introduce some...
August 16th, 2017
03:03 -
Peter
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Re: Open Sets - Unions and Intersections -
by
Evgeny.Makarov
For n \gt 0 where n \in...
August 15th, 2017
18:13 -
Peter
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Re: Limits of Sequences ... Sohrab Exercise 2.2.7
by
Evgeny.Makarov
To show \text{lim } (...
11:17 -
Opalg
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Re: Limits of Sequences ... Sohrab Exercise 2.2.7
by
Evgeny.Makarov
To show \text{lim } (...
04:50 -
Peter
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Re: Closed Sets - Sohrab Exercise 2.2.4 - Part 2
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Evgeny.Makarov
We want to show that \[...
04:49 -
Peter
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Re: Closed Sets - Sohrab Exercise 2.2.4 - Part 2
by
Evgeny.Makarov
For n = 1, the interval...
August 14th, 2017
21:28 -
Peter
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Re: Open Sets - Unions and Intersections -
by
Evgeny.Makarov
Your proof that...
09:27 -
Ackbach
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Re: Closed Sets - Sohrab Exercise 2.2.4 - Part 2
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Evgeny.Makarov
For n = 1, the interval...
August 13th, 2017
20:10 -
Peter
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Re: Open Sets - Unions and Intersections -
by
Evgeny.Makarov
After some reflection I...
August 8th, 2017
21:20 -
Peter
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Re: The AM-GM Inequality - Sohrab Proposition 2.1.25 ...
by
Evgeny.Makarov
This is standard...
August 7th, 2017
14:30 -
lfdahl
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Re: true or false statement
by
Evgeny.Makarov
Another example is...
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Albert
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Re: true or false statement
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Another example is...
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I like Serena
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Re: true or false statement
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Another example is...
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MarkFL
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Re: true or false statement
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Evgeny.Makarov
Another example is...
August 5th, 2017
11:58 -
Fantini
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Re: TiKZ Question on Plotting a Parabola
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Evgeny.Makarov
The figure environment...
August 4th, 2017
09:24 -
Peter
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Re: The Integers as an Ordered Integral Domain ... Bloch Theorem 1.4.6 ...
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Evgeny.Makarov
If natural numbers are...
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Peter
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Re: The Integers as an Ordered Integral Domain ... Bloch Theorem 1.4.6 ...
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Evgeny.Makarov
What exactly is the...
August 3rd, 2017
01:42 -
Ackbach
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Re: TiKZ Question on Plotting a Parabola
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