Recent content by bl4ke360

I just talked to my professor about this and she said you don't multiply the 10 by s, only the fractional part.

Well I won't have time for that, my final is in 10 hours lol. This is what the solution manual says:

Are you sure the limit applies to the 10 as well? When my professor did this type of problem she only applied the limit to the fractional part. I'm so confused because my professor, the solutions manual, and you are all saying different things so I have no idea what is correct.

How did you get infinity for lim s → ∞ sF(s)? This says it's 25: http://www.wolframalpha.com/input/?i=lim+as+x-%3Einfinity+%2825x^2%2B45x%29%2F%28x^2%2B6x%2B5%29

I don't see how you got those results though, because my calculator gives lim s → ∞ sF(s) = 25, whereas that's what you got for lim s → 0 sF(s). And for s → 0 sF(s) it gave me 0 as the answer.

Laplace

Homework Statement Find f(t) for the function F(s)=(10s^2+85s+95)/(s^2+6s+5) and apply the initial and final value theorems to each transform pair Homework Equations Initial value theorem: f(0)=lim s->∞ s(F(s)) Final value theorem: f(∞) = lim s->0 s(F(s)) The Attempt at a Solution...

Homework Statement Find f(t) for the function F(s)=(10s^2+85s+95)/(s^2+6s+5) and apply the initial and final value theorems to each transform pairHomework Equations Initial value theorem: f(0)=lim s->∞ s(F(s)) Final value theorem: f(∞) = lim s->0 s(F(s))The Attempt at a Solution After dividing...

I see what you mean now, but since I only have to go to n=100 I guess I don't have to worry about that here. But I don't know if I'm supposed to change the step size partially into it, or do a separate run of euler's method with a different step size. Since the directions says to use only one...

This problem is 10% of my final grade (and due tomorrow) so I want to make sure I'm doing it correctly. From the directions it says it's supposed to converge, but it doesn't look like it does unless I'm missing something. It converges at around 6.299, with n = 100,000. I also verified it by...

Homework Statement http://img853.imageshack.us/img853/5578/euler.png Homework Equations y_(n+1)=y_n+f(x_n,y_n)h The Attempt at a Solution With n = 100 and step size h = 0.01, I got y_100 = 3.1515 I don't see how this is right, because the directions imply that it's supposed to be accurate...

Well theorem 3.1.1 is a paragraph long, and not really an equation either. I'm not sure about letting c=-3 though, the only reason I did is because wolfram had it as part of the answer but I don't see how.

Homework Statement y''-4y=12x Homework Equations I don't know The Attempt at a Solution http://imageshack.us/a/img7/944/20130207102820.jpg I'm not sure if I did this right, I'm putting this here to make sure. Please respond within 3 hours if you can because it will be due.

Homework Statement r(t)=<t^2,lnt,tlnt> Homework Equations k= |T '(t)| / |r '(t)| The Attempt at a Solution My professor's answer sheet solved the problem using the other method, k(t)=|r '(t) x r ''(t)| / |r '(t)|^3 and that answer ends up being 0.3, while mine is 0.4. I...

Just turned it in, thanks for the help everybody :)