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#51 2013-12-18 04:35:28
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
Okay, do well on your exam. As zetafunc is pointing out there are extensive tables that you can use.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#52 2013-12-18 04:36:44
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
No program necessary -- the Laplace transform of y' is a common identity, and the transforms of 1/s and 1/(s+a) are well-known (you will find them in any table of transforms).
Yes I know it but some program used to check the answer only I expect there is program make full solution 
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#53 2013-12-18 04:39:14
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
Thanks
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#54 2013-12-18 04:43:43
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
Yes I know it but some program used to check the answer only I expect there is program make full solution
Mathematica, Maple and probably Geogebra can all do those problems. They are great teaching aids.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#55 2013-12-18 04:50:44
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
I'll see it
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#56 2013-12-18 04:53:29
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
You can use wolfram alpha too but only after you know how to do it the hand way.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#57 2013-12-18 08:08:29
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
I preferred hand way but just increase my information
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#58 2013-12-18 09:45:24
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
Do you need any more examples?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#59 2013-12-18 22:34:36
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
I hope so
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#60 2013-12-18 22:53:40
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
Here is another example.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#61 2013-12-19 00:16:04
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
I need example like that I posted but with answer
untill now it easy 
Last edited by ammar (2013-12-19 01:00:48)
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#62 2013-12-19 03:00:20
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
Hi;
I do not think the method of Laplace transforms will work on those type.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#63 2013-12-19 03:13:05
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
I search on the internet but nothing
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#64 2013-12-19 03:30:03
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
It is usually used on constant coefficient DE's. #1 is not of that type.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#65 2013-12-19 03:42:45
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
I solved the first one and send it to my professor , But he did not give me the answer 
may be solved by fourier series
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#66 2013-12-19 03:50:56
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
Did you check the answer?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#67 2013-12-19 04:14:38
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
No just another DE without answer
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#68 2013-12-19 04:17:12
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
You mean your solution led to another DE?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#69 2013-12-19 04:22:33
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
Yes , and he still until now refused to give the answer 
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#70 2013-12-19 04:33:08
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
Maybe he does not have an answer.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#71 2013-12-19 04:42:04
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
Hhhhh I think so
He asked about how to find sine wave on line with angle 45 degree
Duty Yearly
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#72 2013-12-19 04:46:23
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
Hmmm, I have seen many people claim they have solutions. I am from Alabama and that is tougher than Missouri.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#73 2013-12-19 05:16:08
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
Fourier series any examples ?
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#74 2013-12-19 05:16:31
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Laplace differential equation
To solve a DE? I have never seen it used like that.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#75 2013-12-19 05:31:43
- ammar
- Member
- Registered: 2013-12-16
- Posts: 69
Re: Laplace differential equation
2nd order D.E by Frobenious ? It solve D.E
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