(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

a) s^2*t''+st*t'=s

b) y(dx/dy)^2=x^2+1

c) 17y''''-t^6*y"-4.2y^5=3cost(t)

2. Relevant equations

3. The attempt at a solution

For part a I thought about doing a reduction of order but I can't because I have the variable s present. Not sure what my other options are.

Part b I solved for dx/dy but now I'm stuck. Can't think clearly

Part c I'm not even remotely sure on how to do this. I was thinking integrating factor but I don't know.

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# Homework Help: Some higher order differential equations

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