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skeeter
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Today,
01:06
anemone
replied to a thread
Problem Of The Week #409 Mar 20th, 2020
in
POTW for Secondary School/High School Students
No one answered to POTW #409. Here is a suggested solution from other: The function S(x)=\sum_{k=1}^{70}\dfrac{k}{x-k} is discontinuous at...
see more
2 replies | 243 view(s)
April 6th, 2020,
17:02
topsquark
replied to a thread
3.4.6 limit of a power function
in
Calculus
Prove It is not giving you the answer he is giving you a suggestion that you can use the limit he posted. See if there is any kind of substitution...
see more
6 replies | 107 view(s)
April 6th, 2020,
16:46
skeeter
replied to a thread
Ferris Wheel observation
in
Pre-Calculus
This should be fairly simple, convert 360 degrees in 18 minutes to x degrees in 1 minute. The graph shows height of a capsule above the ground in...
see more
2 replies | 73 view(s)
April 6th, 2020,
11:33
skeeter
replied to a thread [SOLVED]
Transportation calculus
in
Pre-Algebra and Algebra
that's my mistake ... should be 14.9. I doubled the numerator and denominator to get the coefficient of $n$ to be 1 instead of 0.5. When I decided...
see more
10 replies | 444 view(s)
April 6th, 2020,
09:09
skeeter
replied to a thread [SOLVED]
Transportation calculus
in
Pre-Algebra and Algebra
what does n-1 represent? in the equation I wrote in post #4, $n$ represents the number of additional freight loads
see more
10 replies | 444 view(s)
April 5th, 2020,
10:58
skeeter
replied to a thread [SOLVED]
Transportation calculus
in
Pre-Algebra and Algebra
I have a better idea ... explain how you derived your function.
see more
10 replies | 444 view(s)
April 5th, 2020,
01:08
anemone
started a thread
Problem Of The Week #411 Apr 5th, 2020
in
POTW for Secondary School/High School Students
Here is this week's POTW: ----- Suppose that the positive integers $x, y$ satisfy $2x^2+x=3y^2+y$. Show that $x-y, 2x+2y+1, 3x+3y+1$ are all...
see more
0 replies | 243 view(s)
April 5th, 2020,
01:02
anemone
replied to a thread
Problem Of The Week #410 Mar 27th, 2020
in
POTW for Secondary School/High School Students
No one answered last week's POTW.(Sadface) Below is a suggested solution: The given function is the square of the distance between a point of the...
see more
1 replies | 187 view(s)
April 4th, 2020,
12:16
skeeter
replied to a thread [SOLVED]
Transportation calculus
in
Pre-Algebra and Algebra
simplified the initial cost function ... $C(v) = 1375\left(\dfrac{44.5}{v} + \dfrac{14.9}{180-v}\right)$ minimum cost occurs at $v \approx 114...
see more
10 replies | 444 view(s)
April 4th, 2020,
09:26
skeeter
replied to a thread [SOLVED]
299What is the acceleration
in
Calculus
$v(t) = \cos{t}+\sin{t} \implies a(t) = \cos{t}-\sin{t} \implies a\left(\dfrac{3\pi}{4}\right) = -\sqrt{2}$
see more
4 replies | 351 view(s)
April 3rd, 2020,
10:39
skeeter
replied to a thread [SOLVED]
Transportation calculus
in
Pre-Algebra and Algebra
What are your units for speed, the $x$ in your cost function? I get cost as a function of speed, $v$, in km/hr ... $C(v) = 1375 \bigg$ unit...
see more
10 replies | 444 view(s)
April 2nd, 2020,
17:07
skeeter
replied to a thread
f
in
Calculus
don't know math ... ?
see more
5 replies | 360 view(s)
April 2nd, 2020,
11:56
topsquark
replied to a thread
f
in
Calculus
I believe the proper question is "What the 'f'?" -Dan
see more
5 replies | 360 view(s)
March 31st, 2020,
19:28
skeeter
replied to a thread [SOLVED]
299What is the acceleration
in
Calculus
why did you do that? ... ... if originally, $x = \sin{t}-\cos{t}$, then $v = \cos{t} + \sin{t} = 0 \implies t = \dfrac{3\pi}{4}$
see more
4 replies | 351 view(s)
March 31st, 2020,
17:53
topsquark
replied to a thread [SOLVED]
299What is the acceleration
in
Calculus
Wait! What do you mean by you changed it to v(t)? The particle's position is x(t) = sin(t) - cos(t) means that v = \dfrac{dx}{dt}. You can't just...
see more
4 replies | 351 view(s)
March 29th, 2020,
12:27
skeeter
replied to a thread
Function's Fun
in
Pre-Algebra and Algebra
similar problem from another site had $f(x^2-2016x) = f(x) \cdot x + 2016$ https://mathhelpforum.com/threads/functions-problem.285171/#post-954658...
see more
2 replies | 214 view(s)
March 27th, 2020,
23:42
anemone
started a thread
Problem Of The Week #410 Mar 27th, 2020
in
POTW for Secondary School/High School Students
Here is this week's POTW: ----- Find the minimum value of $(u-v)^2+\left(\sqrt{2-u^2}-\dfrac{9}{v}\right)^2$ for $0<u<\sqrt{2}$ and $v>0$. ...
see more
1 replies | 187 view(s)
March 27th, 2020,
23:38
anemone
replied to a thread
Problem Of The Week #409 Mar 20th, 2020
in
POTW for Secondary School/High School Students
Hi MHB! I have decided to extend the deadline by another week so that our members can give this problem another shot and I am looking forward to...
see more
2 replies | 243 view(s)
March 27th, 2020,
18:40
skeeter
replied to a thread
3.6.26 mvt
in
Calculus
average rate of change of $f(x)$ on the interval $$ is $\dfrac{f(8)-f(2)}{8-2}$ the MVT states there exists at least one value of $x \in (2,8)$...
see more
1 replies | 180 view(s)
March 27th, 2020,
09:04
skeeter
replied to a thread
speed of a light beam
in
Calculus
$\dfrac{d\theta}{dt}$ = 5 rpm = $\dfrac{10\pi}{60 \, sec} = \dfrac{\pi}{6}$ rad/sec consider the right triangle formed by the light beam, the...
see more
1 replies | 120 view(s)
March 26th, 2020,
20:42
topsquark
replied to a thread
Help with understanding this series
in
Calculus
Have you tried looking at \lim_{n \to \infty} \dfrac{a_{n + 1}}{a_n}? -Dan
see more
2 replies | 114 view(s)
March 26th, 2020,
18:35
topsquark
replied to a thread
How to solve this equation
in
Calculus
Let y'(x) = v(x). Then your equation becomes v'(x) + v(x) = -F(x) Now you have a first degree linear ordinary differential equation. You can't...
see more
1 replies | 105 view(s)
March 20th, 2020,
19:44
topsquark
replied to a thread [SOLVED]
s8.2.5.7 chain rule
in
Calculus
Look at your first factor: \left ( 7x^6 + 8 x^3 \right ) ^3 = ( x^3 ( 7 x^3 + 8 ) )^3 = (x^3)^3 (7 x^3 + 8 )^3 Don't worry. It's an easy mistake...
see more
2 replies | 314 view(s)
March 20th, 2020,
02:18
anemone
started a thread
Problem Of The Week #409 Mar 20th, 2020
in
POTW for Secondary School/High School Students
Here is this week's POTW: ----- Show that the set of real numbers $x$ which satisfy the inequality \sum_{k=1}^{70}\dfrac{k}{x-k}\ge...
see more
2 replies | 243 view(s)
March 20th, 2020,
02:15
anemone
replied to a thread
Problem Of The Week #408 Mar 13th, 2020
in
POTW for Secondary School/High School Students
Congratulations to the following members for their correct solution! 1. castor28 2. lfdahl 3. kaliprasad 4. Oxide Solution from Oxide: ...
see more
1 replies | 239 view(s)
March 14th, 2020,
23:25
skeeter
replied to a thread
296 AP calculus exam. IVT
in
Calculus
posted in another forum ... https://mathhelpforum.com/threads/276-ap-calculus-exam-ivt.285028/#post-954029
see more
7 replies | 251 view(s)
March 14th, 2020,
23:06
topsquark
replied to a thread
296 AP calculus exam. IVT
in
Calculus
All of the other answers could be true but since f(x) is not given we could make the function do some or all of these possibilities, as well as...
see more
7 replies | 251 view(s)
March 14th, 2020,
19:06
topsquark
replied to a thread
296 AP calculus exam. IVT
in
Calculus
I'm just saying that f(x) can be anything so I had fun sketching it. -Dan
see more
7 replies | 251 view(s)
March 14th, 2020,
19:04
topsquark
replied to a thread [SOLVED]
Dimensional regularizatoin of an integral
in
Advanced Applied Mathematics
Just to round out the thread I (finally) have an explanation of 3) from my original post. (It looks worse than it is.) p^{ \mu } p^{ \nu } \to ...
see more
7 replies | 733 view(s)
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About skeeter
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Showing Friends 1 to 6 of 6
April 6th, 2020
23:00 -
ducduy
clicked Thanks for this post:
Re: Transportation calculus
by
skeeter
Sorry it was my mistake,...
13:12 -
skeeter
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MHB's future - sell, merge, or archive
by
Jameson
Hi all, I think even...
April 4th, 2020
20:56 -
ducduy
clicked Thanks for this post:
Re: Transportation calculus
by
skeeter
simplified the initial...
12:37 -
topsquark
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Re: 299What is the acceleration
by
skeeter
Sorry I'm late but my...
12:32 -
karush
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Re: 299What is the acceleration
by
skeeter
Sorry I'm late but my...
April 3rd, 2020
23:57 -
karush
clicked Thanks for this post:
Re: 299What is the acceleration
by
skeeter
$\tiny{299}$ For $t...
14:15 -
ducduy
clicked Thanks for this post:
Re: Transportation calculus
by
skeeter
A truck travelling...
11:03 -
topsquark
clicked Thanks for this post:
Re: Transportation calculus
by
skeeter
A truck travelling...
April 2nd, 2020
19:17 -
topsquark
clicked Thanks for this post:
Re: f
by
skeeter
dkm don't know math...
19:12 -
Klaas van Aarsen
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Re: f
by
skeeter
dkm don't know math...
17:11 -
MountEvariste
clicked Thanks for this post:
Re: f
by
skeeter
dkm don't know math...
March 31st, 2020
22:13 -
topsquark
clicked Thanks for this post:
Re: 299What is the acceleration
by
skeeter
$\tiny{299}$ For $t...
March 29th, 2020
15:40 -
topsquark
clicked Thanks for this post:
Re: Function's Fun
by
skeeter
similar problem from...
March 28th, 2020
00:07 -
karush
clicked Thanks for this post:
Re: 3.6.26 mvt
by
skeeter
average rate of change...
March 27th, 2020
19:20 -
topsquark
clicked Thanks for this post:
Re: 3.6.26 mvt
by
skeeter
average rate of change...
10:59 -
topsquark
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Re: speed of a light beam
by
skeeter
$\dfrac{d\theta}{dt}$ =...
March 16th, 2020
17:29 -
karush
clicked Thanks for this post:
Re: 296 AP calculus exam. IVT
by
skeeter
Ok I thot I posted this...
March 15th, 2020
11:30 -
topsquark
clicked Thanks for this post:
Re: 296 AP calculus exam. IVT
by
skeeter
Ok I thot I posted this...
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Name:
MHB Calculus Award (2017)
Issue time: January 21st, 2018 09:41
Issue reason: Congratulations!