Recent content by b2386

Well, I finally was able to get the NDSolve to work for this differential equation for T values from 0 to 24 and I set the NDSolve function to the variable "soln". So what function should I use to graph the numerical solutions?

Well, I have been trying to solve this equation with mathematica for the past two hours with no luck. The general differential equation I am trying to solve is u''_i(T) = .65\frac{u'_{i-1}(T)-u'_{i}(T)}{u_{i-1}(T)-u_{i}(T)}+750(u_{i-1}(T)-u_{i}(T)-1)^3 where i= 1,2,3 and...

Hi all, Does anyone know if Mathematica can numerically solve a second order differential equation?

So in order for a circuit to be modeled by a nonlinear differential equation, the circuit must contain a nonlinear resistor?

Hi all, Can anyone please give me an example of a nonlinear differential equation used to model a certain type of circuit? Thanks

Hi all, As part of my differential equations class, I must choose a real-world event that can be modeled through a system of ordinary linear differential equations and write a five page paper on it. My professor was vague on the requirements but basically wants us to solve the equations...

Homework Statement How do I find the roots of 4x^3+x+5 = 0? It doesn't appear to be in a nice form like many equations in the textbook?

Bob, Ahh, that makes sense. I said there will be five members in each group since that was how we divided up for our last activity, but I can simply create two groups instead of three, which would put eight people in each group. Thanks again for your help and I will run this by my...

That sounds like a really fun activity, Bob. Thanks! I already knew I wanted a game that emphasized the on-the-fly and quick decision-making skills needed by every good manager, which makes this activity all the more appropriate. However, I need a little clarification on the actual...

Hi all, Hope you don't mind me posting here, but I could use a few suggestions for a class assignment. I am supposed to lead an activity in management class on Monday that emphasizes the process and importance of decision making. The activity should be fun and involving but at the same...

Ahh, it makes complete sense now. Thank you for your thorough explanation, AKG. So basically, now I need to solve for the values of t that make y=0.1 and examine their behavior above and below the calculated values to determine the single correct value of T. From looking at the equation...

Homework Statement y=e^{-t}Cos(t)+e^{-t}Sin(t) Find the smallest T such that |y(t)| < 0.1 for t > T Homework Equations none The Attempt at a Solution This question is actually a second part to a differential equations problem, the equation above being my correct solution to...

What exactly is V^2(O)? I haven't had linear algebra so I am probably unfamiliar with some terminology. EDIT: Is that just a 2-D vector space?

Hi all, While working on my differential equations homework, I encountered a proof dealing with linear independence and vector addition. I sort of know how to proceed but, not having dealt with formal proofs much, I am afraid that I may not be addressing all necessary apects of the proof...

Hi all, Just a quick question that is part of a differential equations problem. Can 0=-4sin(t)+\frac{5}{2}e^{\frac{-t}{2}} be solved for t by hand or should I use Mathematica? Thanks