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• Today, 12:40
Neglecting drag, we know the acceleration of the projectile is given by: \d{v}{t}=-g Hence: v(t)=\d{x}{t}=-gt+v_0 And:
1 replies | 54 view(s)
• Yesterday, 12:08
Here is this week's POTW: ----- If $k_1,\,k_2,\,\cdots,\,k_{15}$ are the roots of the equation $x^{15}-2x^{14}+3x^{13}-\cdots+15x-16=0$,...
0 replies | 34 view(s)
• Yesterday, 12:03
Congratulations to the following members for their correct solution: (Smile) 1. Ackbach 2. kaliprasad 3. castor28 Solution from Ackbach: We...
1 replies | 78 view(s)
• January 12th, 2018, 12:32
I am working on deep learning as well but as part of the Masters program. For those interested to see some battles between stockfish and AlphaZero...
5 replies | 156 view(s)
• January 10th, 2018, 11:28
Here is this week's POTW: ----- Find the smallest value of $a$ such that $\dfrac{1}{640}=\dfrac{a}{10^b}$, where $a$ and $b$ are integers. ...
1 replies | 78 view(s)
• January 10th, 2018, 11:24
Congratulations to the following members for their correct solution: (Smile) 1. castor28 2. kaliprasad Solution from castor28: Let us write...
1 replies | 111 view(s)
• January 4th, 2018, 17:45
ZaidAlyafey replied to a thread Happy new year in Chat Room
I am doing good, man. You never get tired of forums :) Thanks Greg!
5 replies | 155 view(s)
• January 4th, 2018, 16:46
It was an oversight I suppose, but adding it now would require a lot of effort. :)
4 replies | 81 view(s)
• January 4th, 2018, 15:43
The direction would be in quadrant III, and so recognizing that both components are negative, you would in fact add $\pi$ to the angle: ...
4 replies | 81 view(s)
• January 3rd, 2018, 20:18
MarkFL replied to a thread Happy new year in Chat Room
Welcome back, Zaid...I've been hoping all is well with you! :)
5 replies | 155 view(s)
• January 3rd, 2018, 19:52
ZaidAlyafey replied to a thread Happy new year in Chat Room
Hey Euge, happy to see you still active here. Yeah, I just added a new section about contour integration ...
5 replies | 155 view(s)
• January 3rd, 2018, 18:45
ZaidAlyafey started a thread Happy new year in Chat Room
Been long time since I posted here. Actually I have had less Maths activity last year besides working on my blog and book. I am happy that the forum...
5 replies | 155 view(s)
• January 3rd, 2018, 15:04
As a follow-up, I would begin by adding the two equations to eliminate $x$ and we obtain: 180-2y=0\implies y=90 Now, substituting for $y$ into...
11 replies | 182 view(s)
• January 3rd, 2018, 12:57
1 replies | 85 view(s)
• January 2nd, 2018, 13:31
You need to equate the first partials to zero, and then solve the resulting system. We have: P(x,y)=100x+80y+2xy-x^2-2y^2-5000 And so we...
11 replies | 182 view(s)
• January 2nd, 2018, 13:15
Yes, how have you been instructed to optimize such functions (with and without constraint)? In order to find the critical point(s) without...
11 replies | 182 view(s)
• January 2nd, 2018, 13:00
What methods are you given in your lecture notes and/or textbook for maximizing multi-variable functions?
11 replies | 182 view(s)
• January 2nd, 2018, 12:33
Okay, let's look at the first problem. Let's write the profit function as: P(x,y)=100x+80y+2xy-x^2-2y^2-5000 We need to set the partial...
11 replies | 182 view(s)
• January 2nd, 2018, 12:21
Hello, and welcome to MHB! (Wave) I changed the thread title to reflect the nature of the questions being asked. A thread title simply stating...
11 replies | 182 view(s)
• January 2nd, 2018, 10:12
Here is this week's POTW: ----- Let $a,\,b$ be non-negative numbers with \sqrt{1-\frac{a^2}{4}}+\sqrt{1-\frac{b^2}{16}}=\frac{3}{2}. Find...
1 replies | 111 view(s)
• January 2nd, 2018, 10:06
No one answered this week's problem. You can read my solution below. From the given constraint that says $x,\,y,\,z > 1$, it implies \$ x^3+ y^3+...
1 replies | 103 view(s)
More Activity

### 16 Visitor Messages

1. Hi Albert,

I was meant to reply to the PM but it seems to me your account here has exceeded your stored private messages quota and hence you cannot receive new message(s).

Anyway, I just wanted to thank you for reply and guess what, I just solved that challenge! Hurray! Haha...

Best,

anemone
2. Hi Albert,

I am aware that to editing our own post of less than 24 hours old (which I think is a good thing rather than keep adding responses by posting new follow-up posts to make mess of the look of one particular thread) is encouraged and not frowned upon, but I wanted to also let you know I have come to realize of your latest edit/update to my latest challenge only when I was about to reply to it. If by any chance I missed reading it, that would be unfair to you because your newest edited post deserves a credit, imho.

Thus in the future if you want to do a major edit to your previous post, I would recommend you to instead add another reply beneath your previous post, does that sound good to you, Albert?

Best wishes,

anemone
3. Hi Albert, congratulations on winning the MHB Challenges Award!
4. Hi Albert,

I wanted to say that I like your profile .sig, Little Prince was a story I read almost 2 years ago but it still touches my heart. It was the best story I ever have read in my life.

Best Regards,
Balarka
.
5. Hello, me again Albert!

Here is what our administrator Jameson has said regarding the issue:

"Ok, when that happens all he needs to do is reload the page. It should eventually render correctly. There's no need for more info. This happens for me periodically as well and I just reload the page. The only issue would be if after reloading many times he still couldn't see Latex."

So, when it happens again, try reloading the page, and if after several times the error still occurs, capture a screen shot and email the image to me.

Best Regards,

Mark.
6. Hello again Albert,

The staff here would really like to help, and it would be informative for use if you could get a screen shot of the error and email it to me, and I will forward it to the staff so we can see exactly what the error looks like at your end.

Best Regards,

Mark.
7. Hello Albert,

I have reported your problem to the staff here, and I can assure you they are a very knowledgeable and involved team of administrators whose primary goal is that our member's problems get addressed promptly.

Best Regards,

Mark
8. Hello Albert,

First I wanted to ask you if the issue you had yesterday was resolved...I waited for your email of the problem description but never got it. I want to help you get to the bottom of the problem if I can.

Second, I edited your latest post of the solution to the minimization problem. We try not to link to other math forums unless we are showing where a problem comes from if posted by someone else, to give credit to the OP. Since this problem is yours, you should post the solution at both places rather than at one, and then linking to that at the other.

Best Regards,

Mark.

1) http://www.mathhelpboards.com/f28/fi...equation-3193/ (Original title: please find n)

2) http://www.mathhelpboards.com/f28/bi...-squares-3198/ (Original title: mission impossible)
10. Hi again! You have asked in your thread >>here<< how to move a thread if you accidentally posted in a wrong sub-forum. The answer is you can't do that. However you can report the post by clicking on the little triangle (shown below) and writing down your request. I have moved your thread to the Challenge Questions and Puzzles sub-forum.

Showing Visitor Messages 1 to 10 of 16
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#### Basic Information

Location:
Taiwan
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math,program,literature,music
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math teacher
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#### Signature

One sees clearly only with the heart.Anything essential is invisible to the eyes
_______From The Little Prince By Antoine de Saint-Exupery

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anemone
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### 9 Friends

1. #### anemoneOffline

Paris la ville de l'amour

2. #### jakncokeOffline

MHB Apprentice

3. #### MarkFLOffline

Pessimist Singularitarian

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MHB Journeyman

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زيد اليافعي

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