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Posted: 4/29/2011 6:06:52 PM EDT
Convert the following into a system of 1st order DEs:
y'' + 2xy' + (y^2)Sin(x) = e^x y(0) = 1 y'(0) = 2 KTHANX 


We are not gonna do your damn ODE homework.
Do you have a specific question about a technique to use? 

Hit the gym, hit the range, hit the bag, and embrace the hate.

ok, i see that this is a nonlinear equation.
that is where i'm hung up. Honestly, any direction would be grand 


I wish I had GD back then. ODEs are hard as shit.



42.
sorry. hopefully someone helpful posts 

Coyote with 40 people crammed into a minivan gets into a chase with DPS, Paco over estimates his driving abilities and *whmmo!* the Astrovan of Immigration becomes a Pinata of Pain, hurling broken bodies like so many tasty pieces of cheap candy...

The answer is..........4?



Sorry, the math help thread is posted in Team.


Pro Patria VigilansU.S. Army Signal Corps
30th BCT "Old Hickory" 
Um....2? No, 288.


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Originally Posted By VBC: I wish I had GD back then. ODEs are hard as shit. lol. PDEs make ODEs seem easy as cake. 


Originally Posted By Naf:
Originally Posted By VBC:
I wish I had GD back then. ODEs are hard as shit. lol. PDEs make ODEs seem easy as cake. baby steps bro 


Originally Posted By Naf:
Originally Posted By VBC:
I wish I had GD back then. ODEs are hard as shit. lol. PDEs make ODEs seem easy as cake. I breezed right through PDEs. That was in Calc III Vectors and Matrices. ODEs gave me trouble for some reason. 


1) Assign state variables
2) Make state equations 3) Put into state space form and include output equation 


Horse shit. I knew none of you all could solve this shit. It's cause you're full of shit.
Or else, not enough time has elapsed yet. 


Originally Posted By UncleJerr:
Convert the following into a system of 1st order DEs: y'' + 2xy' + (y^2)Sin(x) = e^x y(0) = 1 y'(0) = 2 KTHANX What is this? The same type of math Congress uses? 

"The ARFCOM Survival Forum  90% LESS tinfoil than any other survival forum on the net."  TriggerHappy83

Originally Posted By vaughn4380:
Originally Posted By UncleJerr:
Convert the following into a system of 1st order DEs: y'' + 2xy' + (y^2)Sin(x) = e^x y(0) = 1 y'(0) = 2 KTHANX What is this? The same type of math Congress uses? It's acually a legitimate problem. 


Originally Posted By VBC:
Originally Posted By vaughn4380:
Originally Posted By UncleJerr:
Convert the following into a system of 1st order DEs: y'' + 2xy' + (y^2)Sin(x) = e^x y(0) = 1 y'(0) = 2 KTHANX What is this? The same type of math Congress uses? It's acually a legitimate problem. Perhaps I should have used a smiley to express my intentions......like this one 

"The ARFCOM Survival Forum  90% LESS tinfoil than any other survival forum on the net."  TriggerHappy83

Laplace or change of variables?
Been awhile since I have done one of those. 


Originally Posted By UncleJerr:
Convert the following into a system of 1st order DEs: y'' + 2xy' + (y^2)Sin(x) = e^x y(0) = 1 y'(0) = 2 KTHANX I just took my last Differential Equations test today. I wish I could help you but we never covered this stuff. 


Originally Posted By VBC:
Horse shit. I knew none of you all could solve this shit. It's cause you're full of shit. Or else, not enough time has elapsed yet. Actually, I solved it on a piece of scratch paper. I told you how to do it why have you not figured it out? I will give you another clue. It is a method used in controls and it only takes simple algebra manipulation to create the equations. 


Originally Posted By pepelepew:
Originally Posted By VBC:
Horse shit. I knew none of you all could solve this shit. It's cause you're full of shit. Or else, not enough time has elapsed yet. Actually, I solved it on a piece of scratch paper. I told you how to do it why have you not figured it out? I will give you another clue. It is a method used in controls and it only takes simple algebra manipulation to create the equations. Here, I am really feeling generous tonight, State Space 


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