
Differential Equations Ordinary and Partial Differential Equations Math Forum 
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August 10th, 2017, 02:51 PM  #1 
Newbie Joined: Aug 2017 From: Bosnia Posts: 2 Thanks: 0  Solution of these 2 differential equations
y'(x)=(2x+3y+1)^2 and xy*cos(y/x)+xy'*cos(yx)=0 ? 
August 10th, 2017, 03:46 PM  #2 
Senior Member Joined: Feb 2016 From: Australia Posts: 1,286 Thanks: 440 Math Focus: Yet to find out. 
Separately? Or are they coupled? If separately, then the first one is easily identified as the Riccati equation. The second one I'm not so sure. It looks like there could be a substitution of sorts. Otherwise you'll have to solve numerically. 
August 11th, 2017, 07:45 AM  #3 
Newbie Joined: Aug 2017 From: Bosnia Posts: 2 Thanks: 0  
August 11th, 2017, 07:59 AM  #4 
Senior Member Joined: Feb 2016 From: Australia Posts: 1,286 Thanks: 440 Math Focus: Yet to find out. 
What have you tried for the first one Sent from my iPhone using Tapatalk 

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