Tab Content
• Today, 01:16
Here is this week's POTW: ----- If $n$ is a positive integer, evaluate $$\int_{0}^\infty \frac{dx}{1 + x^n}$$ ----- Remember to read...
0 replies | 26 view(s)
• Today, 01:01
No one answered this week's problem. You can read my solution below. The map $\Bbb Z \times \Bbb R \to \Bbb C$, $(z,r) \mapsto zr$ is a $\Bbb... 2 replies | 120 view(s) • Yesterday, 06:59 Hello and welcome to MHB! (Wave) We ask that our users show their progress (work thus far or thoughts on how to begin) when posting questions.... 1 replies | 33 view(s) • Yesterday, 02:52 Thanks GJA ... Appreciate your help ... Peter 3 replies | 45 view(s) • Yesterday, 01:55 MarkFL replied to a thread Domain...2 in Pre-Calculus No factor in the denominator can be zero, and nothing under a square root radical can be negative...so this leads to: t-1\ne0 0<t What do... 1 replies | 27 view(s) • Yesterday, 01:47 I would write: y=\frac{2x}{x-1}=\frac{2x-2+2}{x-1}=\frac{2(x-1)+2}{x-1}=2+\frac{2}{x-1} We see this will have a horizontal asymptote at$y=2$,... 1 replies | 29 view(s) • Yesterday, 01:31 Let's look at a definition: |u|=\begin{cases}u, & 0\le u \\ -u, & u<0 \\ \end{cases} Can you see that we must have: 0\le|u| ? 2 replies | 46 view(s) • March 19th, 2018, 22:43 I am reading "The Basics of Abstract Algebra" by Paul E. Bland ... ... I am currently focused on Chapter 3: Sets with Two Binary Operations:... 3 replies | 45 view(s) • March 19th, 2018, 22:30 Yes, and as Wilmer was pointing out, you would likely want to use the binomial theorem. If you raise both sides to the 5th power, you get: ... 10 replies | 106 view(s) • March 19th, 2018, 21:56 MarkFL replied to a thread [ASK] Integral Question in Calculus You're being asked to find an area, and in essence, you're doing so by adding up a bunch of vertical lines, the length of which are determined by the... 5 replies | 54 view(s) • March 19th, 2018, 21:48 To follow up, we get: \d{x}{t}=\frac{\d{y}{t}\left(x-12y^2\right)}{9x^2-y} Plugging in the given values, we find: ... 4 replies | 52 view(s) • March 19th, 2018, 21:07 MarkFL replied to a thread [ASK] Integral Question in Calculus That's already included in the "top curve minus the bottom curve." :) 5 replies | 54 view(s) • March 19th, 2018, 09:46 MarkFL replied to a thread [ASK] Integral Question in Calculus Let's first look at the bounded region: And so the area is: A=\int_0^3 (-x^2+6x)-(x^2-2x)\,dx=2\int_0^3 -x^2+4x\,dx=2\left_0^3=2(18-9)=18 ... 5 replies | 54 view(s) • March 19th, 2018, 08:38 To follow up, the washer method gives us: V=\pi\int_{x_1}^{x^2} R^2-r^2\,dx The volume of an arbitrary washer is: ... 3 replies | 82 view(s) • March 19th, 2018, 04:16 Thanks castor28 ... Hmm ... beginning to understand what you are saying ... Still concerned and a bit confused ... Surely R/I is a ring... 6 replies | 64 view(s) • March 19th, 2018, 03:53 Thanks for the help, castor28 ... But just a point of clarification ... You write: " ... ... The identity of$R/I_1$is$I_1$... ... " ... 6 replies | 64 view(s) • March 19th, 2018, 02:24 I would first observe that$1+\sqrt{5}$is a root of: x^2-2x-4=0 And so, the coefficients of the expansion: (1+\sqrt{5})^n Can be found... 10 replies | 106 view(s) • March 19th, 2018, 02:16 I am reading "The Basics of Abstract Algebra" by Paul E. Bland ... ... I am currently focused on Chapter 3: Sets with Two Binary Operations:... 6 replies | 64 view(s) • March 19th, 2018, 02:02 You asked this question before: Radical Equation 2 2 replies | 36 view(s) • March 19th, 2018, 02:00 You asked this question before: Radical Equation 1 2 replies | 42 view(s) • March 18th, 2018, 23:25 MarkFL replied to a thread Username Changes in vBulletin Products Update - Version 2.0: Product name changed from "Username Change Alert" to "Username Changes." New usernames escaped before saved to database.... 1 replies | 105 view(s) • March 18th, 2018, 23:03 We consider that both$x$and$y$are functions of time$t\$, and so beginning with: 3x^3+4y^3=xy We apply on the left the power and chain...
4 replies | 52 view(s)
• March 18th, 2018, 22:27
Hello, and welcome to MHB! (Wave) We are given the curve: 3x^2+4y^3=xy In order to answer the given question, it will be helpful to...
4 replies | 52 view(s)
• March 18th, 2018, 07:58
MarkFL replied to a thread More integral substitution in Calculus
Is it possible it wants a decimal approximation there? Of course, then the issue is how many digits of accuracy? Gotta love these automated systems,...
12 replies | 104 view(s)
• March 18th, 2018, 07:44
MarkFL replied to a thread More integral substitution in Calculus
Okay, proceeding to part (b), I get (leaving off the constant of integration): \int e^{4x}\left(3+e^{4x}\right)^3\,dx=\frac{1}{4}\int...
12 replies | 104 view(s)
More Activity

### 17 Visitor Messages

1. Hello and welcome back to MHB, Deveno!

We are happy to see that you have returned, and we look forward to your continued participation here!

On Behalf Of MHB's Staff,

anemone.
2. Hi Deveno ... ... Hope you return to MHBs soon ... you are sadly missed ...

Peter
3. Hi Deveno ... haven't seen you for a while ... hope all is well with you ...

Best regards,

Peter
4. Hi Deveno,

Sorry that I have not answered your post yet ...

work has taken me out of the state of Tasmania and into regional Victoria ... about 150kms outside Melbourne ...

Should re-establish broadband links and get some time in a day or so ...

Thanks as always for you help ...

Peter
5. Hello and welcome back to MHB, Deveno!

We are happy to see that you have returned, and we look forward to your continued participation here!

On Behalf Of MHB's Staff,

anemone.
6. Good answers on Peter's questions, and well-given exercises too. Unfortunately though I wouldn't be able to check Peter's work on the matrix algebras. Every ring is commutative to me
7. Thanks a bunch, I'll see if I can play through your ideas.
8. Hello, David, what d'you think of the group theoretic analogy of galois theory I have posted in the abstract algebra forum? Can this thing be arrow-theoretically generalized to categories too?
9. I'm a little late but congratulations on 1k posts! Really happy to have you at MHB and here's a toast to the next 1k.
10. excellent respond to the "how do you add and subtract measurements" thread. i would not have had the energy to go through all of that step by step like that.
Showing Visitor Messages 1 to 10 of 17
Page 1 of 2 12 Last
Page 1 of 2 12 Last
About Deveno

#### Basic Information

##### About Deveno
Biography:
i am uncountably finite
Location:
just south of canada
Interests:
i used to like eno b4 he went bald
Occupation:
erstwhile designer of some sort
Country Flag:
United States

#### Statistics

Total Posts
1,967
Posts Per Day
0.88
##### Thanks Data
Thanks Given
420
Thanks Received
4,373
Thanks Received Per Post
2.223
##### Visitor Messages
Total Messages
17
Most Recent Message
December 22nd, 2017 16:33
##### General Information
Last Activity
January 7th, 2018 20:40
Last Visit
January 1st, 2018 at 15:12
Last Post
January 7th, 2018 at 20:38
Join Date
February 15th, 2012

### 14 Friends

1. #### alane1994Offline

MHB Craftsman

2. #### AlexmahoneOffline

MHB Craftsman

3. #### anemoneOnline

Paris la ville de l'amour

MHB Master

5. #### FantiniOffline

MHB Craftsman

6. #### jacobiOffline

MHB Apprentice

7. #### MarkFLOffline

Pessimist Singularitarian

MHB Master

9. #### PranavOffline

MHB Craftsman

10. #### Rido12Offline

MHB Journeyman

Showing Friends 1 to 10 of 14
Page 1 of 2 12 Last
No results to show...
Ranks Showcase - 2 Ranks
Icon Image Description

Name: MHB Advanced Algebra Award (2015)
 Issue time: January 7th, 2016 11:09 Issue reason:

Name: MHB Advanced Algebra Award (Jul-Dec 2013)
 Issue time: January 5th, 2014 16:50 Issue reason: