• Today, 18:07
I appreciate another take on the sites that I have listed. The more views I get from you all, the better. I view the way MHB goes as a group decision...
6 replies | 203 view(s)
• Today, 11:06
The problems with MHF were always about personnel and authority structure. If the leaders of MHF had been willing to appoint multiple admins, like we...
6 replies | 203 view(s)
• Today, 07:06
First we need to write the DE as a system of first order DEs. Let $\displaystyle u = y$ and $\displaystyle v = y'$. Then $\displaystyle... 0 replies | 32 view(s) • Today, 06:42 We would need to recognise that the integral in the equation is a convolution integral, which has Laplace Transform:$\displaystyle...
0 replies | 24 view(s)
• Today, 06:26
Taking the Laplace Transform of the equation gives \displaystyle \begin{align*} s^2\,Y\left( s \right) - s\,y\left( 0 \right) - y'\left( 0... 0 replies | 20 view(s) • Today, 02:53 Thank you for pointing this out. I have not looked at other sites in a long time so don't know these things. If a merge was possible I promise I... 6 replies | 203 view(s) • Today, 02:24 I'd be worried about a merge, the spam on MHF is out of control and has been for years, and I have concerns that should we merge, the same thing... 6 replies | 203 view(s) • Today, 02:01 Hey firemath, Thank you for the reply. It's great to hear back from someone on this tough topic. I actually strongly prefer a merge over other... 6 replies | 203 view(s) • April 6th, 2020, 12:06 Hi all, I think even we do switch to XF (is still going to happen) the time has come to make a change. We have a database of amazing content here... 6 replies | 203 view(s) • April 6th, 2020, 11:37 Hi all, I hope you are all safe, healthy, and not affected in a serious way by the world wide COVID-19 virus. Here in the US it has completely... 0 replies | 57 view(s) • April 6th, 2020, 01:44 Why are you plugging in large negative values for x? Surely for an infinite limit you should be plugging in large positive values. As for a hint,... 4 replies | 97 view(s) • April 5th, 2020, 20:46 Prove It replied to a thread [SOLVED] Limit of exponential function in Pre-Calculus This is a\displaystyle 1^{\infty} $indeterminate form. It can be transformed into a form that can use L'Hospital's Rule by$\displaystyle...
7 replies | 286 view(s)
• April 5th, 2020, 10:02
Since this is of the form $\displaystyle \frac{f\left( t \right)}{t}$ we should use $\displaystyle \mathcal{L}\,\left\{ \frac{f\left( t \right) }{t}... 0 replies | 55 view(s) • April 5th, 2020, 09:15 To apply this Runge-Kutta scheme, we will need to write our second order DE as a system of first order DEs. Let$\displaystyle u = y $and... 0 replies | 42 view(s) • April 5th, 2020, 08:53 The Bisection Method solves equations of the form$\displaystyle f\left( x \right) = 0 $so we must write the equation as$\displaystyle 11\cos{...
0 replies | 191 view(s)
• April 5th, 2020, 03:46
The Secant Method is a numerical scheme to solve equations of the form $\displaystyle f\left( x \right) = 0$, so we must rewrite the equation as...
1 replies | 210 view(s)
• April 4th, 2020, 21:13
Prove It replied to a thread Need help in Analysis
It's a bit hard to use something that you haven't given us...
1 replies | 275 view(s)
• April 3rd, 2020, 15:47
I have obtained access to the full solutions manual, after contacting Wiley about it. I will not type up the solution in full, but simply note a few...
1 replies | 299 view(s)
• April 3rd, 2020, 00:50
Newton's Method solves an equation of the form $\displaystyle f\left( x \right) = 0$, so we need to rewrite the equation as $\displaystyle... 0 replies | 235 view(s) • April 2nd, 2020, 15:47 In the mid-1990's, an electrical engineer/computer scientist by the name of Judea Pearl started to change the world by greatly improving our... 0 replies | 262 view(s) • April 1st, 2020, 15:04$\newcommand{\doop}{\operatorname{do}}$Problem: (This is from Study question 4.3.1 from Causal Inference in Statistics: A Primer, by Pearl,... 1 replies | 299 view(s) • April 1st, 2020, 08:33 The Bisection Method is used to solve equations of the form$\displaystyle f\left( x \right) = 0 $, so we need to rewrite the equation as... 0 replies | 247 view(s) • April 1st, 2020, 07:44 You first have to write this DE as a system of first order equations. Note, since$\displaystyle t$does not appear in the original DE, that means... 0 replies | 233 view(s) • March 30th, 2020, 04:23 Prove It replied to a thread 34 mnt in Calculus The average acceleration is$\displaystyle \frac{20}{\frac{1}{6}} = 120 \,\textrm{mi}/\textrm{h}^2 $Since the function is continuous and smooth,... 1 replies | 160 view(s) • March 28th, 2020, 20:13 You also have an arithmetic error. When$\displaystyle t = 5$you end up with$\displaystyle 5 = C - \frac{3}{121} \implies C = 5 + \frac{3}{121} =...
4 replies | 171 view(s)
• March 28th, 2020, 18:48
Thanks for pointing out my error Hallsofivy. Adam is one of my students, and the topic they are learning is Laplace Transforms, so he will have to...
4 replies | 171 view(s)
• March 28th, 2020, 05:02
Take the Laplace Transform of the equation: \$\displaystyle \begin{align*} s\,Y\left( s \right) - y\left( 0 \right) + 11\,Y\left( s \right) &=...
4 replies | 171 view(s)
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