How to solve ode integrating factor Videos

• 1. Integrating factor method: Solving a first order ordinary differential equation
• 2. Integrating factor - Differential Equations : ExamSolutions Maths Tutorials
• 3. Solving non-Exact Differential Equations using Integrating Factors
• 4. Non-exact differential equation with integrating factor example
• 5. Differential Equation - 1st Order: Integrating Factor (1 of 14) Exact Equation Revisited
• 6. How to solve non exact differential equations with an integrating factor
• 7. Solving First-Order Differential Equations
• 8. ODE | Integrating factors general method

Integrating factor method: Solving a first order ordinary differential equation

User Comments

numericalmethodsguy commented on 16 Jan 2013

Just by putting in the form d/dx(uv)=u*dv/dx+v*du/dx. Recognize that 2*exp(2*x)=d/dx(exp(2*x))

Autar Kaw commented on 17 Jan 2015

Norhan Ahmed - it is because d/dx(exp(2*x))=2*exp(2*x) giving exp(2*x)=1/2*d/dx(exp(2*x))

Norhan Ahmed commented on 17 Jan 2015

how it become 3x^2/2 when integrating by part from where u got the 1/2 explain????

numericalmethodsguy commented on 16 Jan 2013

Where does the 2 come from. Remember: 2*exp(2*x)=d/dx(exp(2*x))

James Philippe commented on 16 Jan 2013

shouldnt thr equations at 4:09 add up to 2 d/dx(e^2x X y)

James Philippe commented on 16 Jan 2013

How did you come up with the equation at time 3:34

engproud93 commented on 09 Oct 2013

You are a god

Integrating factor - Differential Equations : ExamSolutions Maths Tutorials

User Comments

Sands Kreative Verksted commented on 09 Dec 2015

Great!! Thank you so much!

ExamSolutions commented on 10 Dec 2015

+Sands Kreative Verksted Thank you

Gabrielle Blewitt commented on 07 Dec 2015

everythings great but you drag on your words in such an annoying way it makes me want to cry

ExamSolutions commented on 08 Dec 2015

+Gabrielle Blewitt You can always go and look at other YouTube videos and make discouraging comments to those who offer help for free.

Solving non-Exact Differential Equations using Integrating Factors

User Comments

prince hacker commented on 06 Apr 2015

but one thing i dont get it that >How we know that we should use Either My-Nx/N or Nx-My/M plz explain i get it all about IF but before step ..

Mace_In_Your_Face commented on 07 Aug 2015

I got 67% for the module lol :L 

CogitoErgoCogitoSum commented on 28 Jul 2015

+Mace_In_Your_Face You can do it either way, people. Geeze. Is there only one way to solve any problem, is that what you're thinking? How the hell are you in DE courses if you havent figured it out yet that you can solve a problem however you want as long as the logic is sound.Try it either way. Or both ways.

Mace_In_Your_Face commented on 09 Apr 2015

+prince hacker tbh I am wondering the same thing

Non-exact differential equation with integrating factor example

User Comments

Ben Swain commented on 10 Dec 2015

It seems like all of differential equations could be covered in a week with videos like this. I wish my professor would give videos instead of lecturing. Our class notes are slightly less detailed than our textbook, so we're basically rewriting the textbook on the board during lectures. I don't understand it.

Engineer4Free commented on 11 Dec 2015

+Ben Swain Ah well at least my videos are helping a little! You can find the rest of the differential equations tutorials that I've made so far here: //www.engineer4free.com/differential-equations.html

prince hacker commented on 06 Apr 2015

one thing i dont get it..that why you used that only Rule why you didnt used this one. dM/dX - dN/dY /N. plzz explain this

Mace_In_Your_Face commented on 17 Apr 2015

The : is two eyes and the ) is a smile so it's a face, two eyes and a smile.  :-) 

prince hacker commented on 16 Apr 2015

whats its means :) ?

Mace_In_Your_Face commented on 16 Apr 2015

:)

prince hacker commented on 15 Apr 2015

ooh thanks sir now i got it.i was confused. but now cleared .

Mace_In_Your_Face commented on 09 Apr 2015

+prince hacker you use which ever one gives you a result wich is only a function of x or y.

Differential Equation - 1st Order: Integrating Factor (1 of 14) Exact Equation Revisited

User Comments

dy/dx commented on 13 Aug 2015

You're a great teacher, thanks for the video!

aziz albajali commented on 28 Oct 2015

thanx alot

How to solve non exact differential equations with an integrating factor

User Comments

Pranoy Bhatnagar commented on 18 May 2015

where the link to the example where the integrating factor is in terms of 2 variables?

Solving First-Order Differential Equations

User Comments

mariomaruf commented on 07 Jan 2011

Shouldn't the integrating factor have been Ce^x^2 because of the constant of integration in the power of the integrating factor?

Alex Leech commented on 08 May 2012

Thanks! Fantastic tutorial and not confusing at all like some of the other tutorials on here! :)

Freddy Boy commented on 04 Nov 2013

would you mind show me how to solve dy/dx =1/x^2-y/x-y^2? Thank you so much!!!!

Brandi Lynne commented on 10 Jan 2011

@mariomaruf No.. the integrating factor is just e^x^2, the video is correct.

Laus Bigum commented on 04 Jan 2015

4:05 "and they've got a big little bin there". Made me chuckle.

matizzy commented on 15 Dec 2012

wasn't this a separable differential equation? dy/(-2y+5) = xdx

Ibrahem Akkad commented on 18 Oct 2015

best calculas video on youtube !!

Matt commented on 08 Dec 2015

bloody good show mate

ODE | Integrating factors general method

User Comments

commutant commented on 21 Jul 2013

No, there are many antiderivatives. An antiderivative of p(x) is a function whose derivative is p(x), and there are infinitely many functions that will do the trick. For example, if p(x) = 2x, then x^2 + C for any constant C is an antiderivative. Now, it gets interesting when we try to figure out why it doesn't matter which antiderivative we choose! After all, the antiderivative appears in the formula at 1:36, wouldn't the formula change if we choose a different antiderivative for p(x)?

Paul Miller commented on 10 Sep 2012

Because every anti derivative of p(x) just differs by some 'const', so our IFs will simply 'differ' by an 'e^const' - a constant factor. That factor can therefore come out in front of the integral of 'r(x).q(x)' where it will cancel with the constant factor in the '1/r(x)'

blahmonster1234 commented on 21 Jul 2013

These two videos are the best explanations of the integrating factors method that I've found, and I've watched everyone's videos. My mind is blown; I'm definitely going to watch them again tomorrow and work through them as you suggest.

blahmonster1234 commented on 21 Jul 2013

When you say that we can use any antiderivative of p(x) that we choose for the integrating factor, what do you mean? Isn't there only one antiderivative for any given function?

Chris10B commented on 05 May 2013

Thanks for this. I'm in my first year of mechanical engineering, exams coming up soon. This video series cleared up a lot of uncertainty I had around ODEs

Austin Hornbaker commented on 27 Jan 2015

Lifesaver. Most important 5 minutes of my day

yao zhou Ong commented on 12 Nov 2015

awesome explanation. THANK YOU!

William Garcia commented on 25 Nov 2015

Great job! Thanks

JaaricusW commented on 14 Oct 2015

Thank you :)

commutant commented on 10 Sep 2012

Yes, well said.