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karush
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May 24th, 2018,
18:50
karush
started a thread [SOLVED]
Find order of each element,
in
Linear and Abstract Algebra
$\text{1. Find order of each element, find the generator ($\delta$) of any properties}$ $$\displaystyle Z_q^*=\left\{ 1,2,4,5,7,8\right\}$$ 2....
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0 replies  49 view(s)
May 24th, 2018,
16:00
MarkFL
replied to a thread
Word problem on vectors
in
Geometry
Hello, and welcome to MHB, Gummg! (Wave) I would write the plane's velocity vector as: \vec{v}=485\left\langle...
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3 replies  78 view(s)
May 22nd, 2018,
14:03
MarkFL
replied to a thread
Help with CNF
in
Discrete Mathematics, Set Theory, and Logic
Here's the image you tried to hotlilnk:
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4 replies  97 view(s)
May 22nd, 2018,
00:46
MarkFL
replied to a thread
Solve this please
in
PreAlgebra and Algebra
I would take Greg's advice and write: 5\sqrt{2}\pm7=(b\sqrt{2}\pm a)^3=\pm...
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5 replies  146 view(s)
May 20th, 2018,
23:49
MarkFL
replied to a thread
What is a little 2 in the lower right hand corner?
in
PreAlgebra and Algebra
Where does "it" say that?
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11 replies  17728 view(s)
May 16th, 2018,
20:53
MarkFL
replied to a thread
Jokes
in
Chat Room
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175 replies  24424 view(s)
May 16th, 2018,
17:20
karush
started a thread
15.4.20 volumn via triple integrals
in
Calculus
$\textsf{The region in the first octant bounded by the coordinate planes and the surface }$ $$z=4x^2y$$ $\textit{From the given equation we...
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1 replies  87 view(s)
May 14th, 2018,
23:15
MarkFL
replied to a thread
[ASK] Fraction Addition with Arithmetic Series as Denominators
in
PreAlgebra and Algebra
We know: \sum_{k=1}^n(k)=\frac{n(n+1)}{2} And so the given series becomes: ...
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1 replies  91 view(s)
May 13th, 2018,
12:36
karush
replied to a thread
15.2.54 change in limits
in
Calculus
so what is the advantage of thst? just easier numbers?
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6 replies  175 view(s)
May 12th, 2018,
09:10
MarkFL
replied to a thread
Greetings from Scotland
in
Introductions
He posted a question in one of my vB product threads, which leads me to believe he may run his own site.
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7 replies  250 view(s)
May 11th, 2018,
19:31
MarkFL
replied to a thread
Greetings from Scotland
in
Introductions
Do you own/admin your own site?
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7 replies  250 view(s)
May 11th, 2018,
15:57
karush
started a thread
15.2.54 change in limits
in
Calculus
\begin{align}\displaystyle &=\int_{0}^{8}\displaystyle \int_{\sqrt{x}}^{2} \frac{dydx}{y^4+1}&&(1)\\ &\qquad D: 0\le x \le 8, \quad...
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6 replies  175 view(s)
May 11th, 2018,
11:53
MarkFL
replied to a thread
Greetings from Scotland
in
Introductions
Hello, and welcome to MHB! (Wave)
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7 replies  250 view(s)
May 11th, 2018,
11:34
MarkFL
replied to a thread
Force Read Thread Addon
in
vBulletin Products
That would require another product, as that's not what this product is intended for. :)
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3 replies  248 view(s)
May 10th, 2018,
15:26
MarkFL
replied to a thread
solve for x
in
PreAlgebra and Algebra
Is the equation: 2^{3x}+1=32 Or: 2^{3x+1}=32 I suspect it is the latter, but I want to be sure first. :)
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5 replies  142 view(s)
May 9th, 2018,
03:00
MarkFL
replied to a thread
Mixing with a Common Drain  page 537 #46 in Fundamentals of Differential Equations and BVP by Nagle
in
Differential Equations
Yes, I get equivalent results. (Yes)
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6 replies  283 view(s)
May 9th, 2018,
00:32
MarkFL
replied to a thread
Mixing with a Common Drain  page 537 #46 in Fundamentals of Differential Equations and BVP by Nagle
in
Differential Equations
I got the equivalent: x_2(t)=\frac{\alpha3}{10\alpha}e^{3t}\left(1e^{\alpha t}\right) Now, for the optimization of this function, recall we...
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6 replies  283 view(s)
May 8th, 2018,
21:48
MarkFL
replied to a thread
Hi
in
Introductions
Hello! Glad you found us. (Wave)
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3 replies  161 view(s)
May 8th, 2018,
21:44
MarkFL
replied to a thread
Mixing with a Common Drain  page 537 #46 in Fundamentals of Differential Equations and BVP by Nagle
in
Differential Equations
I would begin with: \d{x_1}{t}=3x_1 where x_1(0)=\frac{1}{10} Hence: x_1(t)=\frac{e^{3t}}{10} Then:
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6 replies  283 view(s)
May 8th, 2018,
09:48
MarkFL
replied to a thread
Using constants in expressions.
in
Computer Science
Yes, that is one of the behaviors of spammers. Unfortunately, this gets innocent posts like the one above moderated as well. But, as with everything...
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10 replies  623 view(s)
May 8th, 2018,
09:26
MarkFL
replied to a thread
Using constants in expressions.
in
Computer Science
The post was put into the moderation queue because a new user "necroposted." I have just approved the post.
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10 replies  623 view(s)
May 8th, 2018,
01:39
karush
replied to a thread [SOLVED]
t.15.28 Find the volume of the region
in
Calculus
I'm in math heaven
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12 replies  309 view(s)
May 7th, 2018,
18:26
karush
replied to a thread [SOLVED]
t.15.28 Find the volume of the region
in
Calculus
$\displaystyle \int_{1}^{0} (4y^2)\,dx = \left_0^1 =4y^2$ So then \begin{align*}\displaystyle A_z&=\iint \limits_{R}4y^2 \, dA\\ ...
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12 replies  309 view(s)
May 6th, 2018,
17:19
karush
replied to a thread [SOLVED]
t.15.28 Find the volume of the region
in
Calculus
$$\begin{align*}\displaystyle &=\int_{0}^{1}(4y^2) \, dx\\ &=\left \biggr_0^1 =4\frac{1}{3}=\frac{11}{3}&(3) \end{align*}$$ well I think it...
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12 replies  309 view(s)
May 6th, 2018,
16:00
karush
started a thread [SOLVED]
t.15.28 Find the volume of the region
in
Calculus
$\tiny{t.15.28}$ $\text{Find the volume of the region bounded above by the surface }\\$ $\text{$z=4y^2$ and below by the rectangle $R:...
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12 replies  309 view(s)
May 6th, 2018,
11:24
MarkFL
replied to a thread
How create a composite damped periodic function that effectively models attached image?
in
PreAlgebra and Algebra
All the assumptions were posted.
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9 replies  162 view(s)
May 5th, 2018,
19:28
MarkFL
replied to a thread
Tangent to parametric curve
in
Calculus
I would speak to the professor to see what's up with that question. :)
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4 replies  132 view(s)
May 5th, 2018,
13:08
MarkFL
replied to a thread
Tangent to parametric curve
in
Calculus
advanced:...
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4 replies  132 view(s)
May 5th, 2018,
11:35
MarkFL
replied to a thread
Tangent to parametric curve
in
Calculus
The slope of the line can be found from: ...
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4 replies  132 view(s)
May 4th, 2018,
22:28
MarkFL
replied to a thread
How create a composite damped periodic function that effectively models attached image?
in
PreAlgebra and Algebra
Well, that's a tiny graph, which isn't very easy to read. I would begin with the amplitude A(x)=a\left(e^{bx}+d\right) Let's say: ...
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9 replies  162 view(s)
May 4th, 2018,
21:07
MarkFL
replied to a thread
How create a composite damped periodic function that effectively models attached image?
in
PreAlgebra and Algebra
If $d=0$ and presumably $b<0$, then what would prevent the amplitude from tending to zero as $x\to\infty$, instead of some value greater than zero?
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9 replies  162 view(s)
May 4th, 2018,
15:33
MarkFL
replied to a thread
Trig ratio challenge
in
Trigonometry
Why is this posted here in the Challenges forum?
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6 replies  194 view(s)
May 3rd, 2018,
21:27
MarkFL
replied to a thread
How create a composite damped periodic function that effectively models attached image?
in
PreAlgebra and Algebra
It appears to me that you need something of the form: y=a\left(e^{bx}+d\right)\cos(cx)+f
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9 replies  162 view(s)
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November 24th, 2015
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November 24, 1944 (73)
About karush
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retired from Architecture and Surveying
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May 16th, 2018
17:04 
karush
clicked Thanks for this post:
Re: t.15.28 Find the volume of the region
by
I like Serena
Yep. All good.
17:03 
karush
clicked Thanks for this post:
Re: t.15.28 Find the volume of the region
by
I like Serena
$\displaystyle...
May 13th, 2018
12:35 
karush
clicked Thanks for this post:
Re: 15.2.54 change in limits
by
Country Boy
In the first integral, x...
May 12th, 2018
21:43 
karush
clicked Thanks for this post:
Re: 15.2.54 change in limits
by
tkhunny
\begin{align}\displaystyl...
May 7th, 2018
17:09 
karush
clicked Thanks for this post:
Re: t.15.28 Find the volume of the region
by
I like Serena
$4xy^2x$ And with...
01:05 
karush
clicked Thanks for this post:
Re: t.15.28 Find the volume of the region
by
I like Serena
$$\begin{align*}\displays...
May 6th, 2018
17:08 
karush
clicked Thanks for this post:
Re: t.15.28 Find the volume of the region
by
I like Serena
$\tiny{t.15.28}$...
16:36 
karush
clicked Thanks for this post:
Find the area of region
by
MarkFL
I would use the symmetry...