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May 3rd, 2014, 06:27 PM   #1
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second order ODEs

Hi, are any of these linear second order non-homogeneous ODES?
I was thinking possibly 3 & 4? Thanks

q4.jpg

Last edited by skipjack; May 4th, 2014 at 03:01 PM.
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May 3rd, 2014, 08:43 PM   #2
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I'd agree with that. 5 might be, but I can't read the exponent on the exponential function very clearly. I have a suspicion that the term is $e^{z^2}$, in which case it's not homogeneous.
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May 3rd, 2014, 09:17 PM   #3
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thanks, would you class '5' as linear or non-linear?
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May 3rd, 2014, 10:09 PM   #4
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Oh! With that $\sqrt{1+y}$ I guess it's non-linear.
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