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• Yesterday, 20:52
Actually it's the same. It's just that MarkFL ended up with a different form of an equation on your list. #4 in this case. -Dan
6 replies | 103 view(s)
• Yesterday, 20:06
MarkFL replied to a thread Related Rates in Calculus
Yes, the length of his shadow is increasing at a rate of 4/3 ft/s, and the tip of his shadow is moving at a rate of 10/3 ft/s. :D
8 replies | 96 view(s)
• Yesterday, 16:29
MarkFL replied to a thread Related Rates in Calculus
I got 4/3 ft/s where you got 3 ft/s. You have the line: \d{y}{t}=\frac{3}{2}\d{x}{t} Now, this implies: \d{x}{t}=\frac{2}{3}\d{y}{t}
8 replies | 96 view(s)
• Yesterday, 16:20
Nicely done, Chris! (Yes) This is the solution I found elsewhere: We are given to evaluate: \lim_{n\to\infty}\left(\sqrt{\int_0^1...
4 replies | 114 view(s)
• Yesterday, 15:15
MarkFL replied to a thread Related Rates in Calculus
Suppose we wanted to work the problem in general terms. Please refer to the following diagram: $P$ is the height of the pole, $M$ is the...
8 replies | 96 view(s)
• February 26th, 2017, 23:47
Compute the following limit: \lim_{n\to\infty}\left(\sqrt{\int_0^1 \left(1+x^n\right)^n\,dx}\right)
4 replies | 114 view(s)
• February 26th, 2017, 02:44
I am reading Anderson and Feil - A First Course in Abstract Algebra. I am currently focused on Ch. 8: Integral Domains and Fields ... I need...
1 replies | 42 view(s)
• February 26th, 2017, 02:02
I am reading Anderson and Feil - A First Course in Abstract Algebra. I am currently focused on Ch. 8: Integral Domains and Fields ... I need...
1 replies | 41 view(s)
• February 26th, 2017, 01:48
We could likely model this with a function of the form (which comes from Newton's Law Of Cooling): f(t)=c_1e^{-kt}+350 Since we know $f(0)=70$,...
1 replies | 77 view(s)
• February 26th, 2017, 01:01
My solution: Consider the objective function: F(A,B,C)=\sin(A)+\sin(B)+\sin(C)-\cos(A)-\cos(B)-\cos(C) Subject to the constraint: ...
3 replies | 114 view(s)
• February 25th, 2017, 23:35
Let's look at the behavior of the solutions near the equilibrium solution $y=3$. Suppose we have: y(0)=2.9 Then we see: y'<0 And for:
4 replies | 78 view(s)
• February 24th, 2017, 11:34
3 replies | 94 view(s)
• February 24th, 2017, 11:28
There's no need to link to the commercial site you used. Thanks! :D
3 replies | 99 view(s)
• February 24th, 2017, 00:26
Let's find the $p$th term. I think what I would do is set: \frac{n(n+1)}{2}=p Now solve for $n$... n(n+1)=2p
1 replies | 58 view(s)
• February 23rd, 2017, 22:15
Perhaps you meant how can we derive this formula. Let's begin with the definition of average acceleration: \overline{a}=\frac{\Delta v}{\Delta...
6 replies | 103 view(s)
• February 23rd, 2017, 20:43
I made a mistake in my above post...the IVP should be: \displaystyle \d{F}{t}=2-\frac{5F}{4(50-t)} where $F(0)=0$. So, this leads to: ...
7 replies | 125 view(s)
• February 23rd, 2017, 16:33
I would let $F(t)$ be the amount of fertilizer in the tank at time $t$. From the problem statement, we get the following IVP: ...
7 replies | 125 view(s)
• February 23rd, 2017, 14:31
I don't follow...it's already in the form we want to give us the acceleration. :D
6 replies | 103 view(s)
• February 23rd, 2017, 14:28
The kinematic formula you want is: \overline{a}=\frac{v_f^2-v_i^2}{2\Delta x}
6 replies | 103 view(s)
• February 23rd, 2017, 02:40
Our goal is to make MHB stand out as much as we can from our competitors by offering features you just don't see anywhere else. If we were to package...
3 replies | 128 view(s)
• February 23rd, 2017, 02:35
MarkFL replied to a thread Tapatalk... in Chat Room
Personally, I don't think Tapatalk is ready for vBulletin, much less sites using $\LaTeX$. From what I've gathered, many vBulletin admins refuse to...
4 replies | 94 view(s)
• February 23rd, 2017, 01:29
MarkFL replied to a thread Tapatalk... in Chat Room
I'd be happy if Tapatalk didn't lazily bypass most vBulletin PHP plugin hooks. (Giggle)
4 replies | 94 view(s)
• February 22nd, 2017, 20:01
Well! ... that is a thoroughly convincing proof!!! Thanks HallsofIvy ... really helpful ... Peter
5 replies | 119 view(s)
• February 22nd, 2017, 04:08
Your solution to the given IVP isn't correct...we are given: \d{y}{x}=9x^8e^{-x^9} where y(0)=8 \int_{y(0)}^{y(x)}\,du=\int_0^x...
1 replies | 66 view(s)
• February 22nd, 2017, 02:00
Here is this week's POTW: ----- Let $(\mathcal{C}, \partial)$ be a chain complex of abelian groups. Suppose $f, g : \mathcal{C} \to \mathcal{C}$...
0 replies | 51 view(s)
• February 22nd, 2017, 01:57
Hi MHB community, My apologies for the delayed post, I was unwell. No one answered this week's problem, but you can read my solution below. ...
1 replies | 111 view(s)
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### 16 Visitor Messages

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

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

Best regards,

Peter
3. Hi Deveno,

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
4. 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.
5. 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
6. Thanks a bunch, I'll see if I can play through your ideas.
7. 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?
8. 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.
9. 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.
10. Hey nice color change!
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