From: drhuang57@gmail.com   
      
   On Tuesday, 2 August  07:30:36 UTC+10, none Rouben Rostamian  wrote:   
   > In article <1fbbda2a-ca78-40d9-8378-bf9715da7cee@m22g2000yqh.g   
   oglegroups.com>,   
      
      
   > zz   wrote:   
   > >y''''=(a+b*x)*y,a,b are constant. any hints or links, or good math   
   > >handbook recommendation? thanks.   
   >   
   > I tried this in Maple.  It did not find an explicit solution.   
   >   
   > A series solution is possible, as in:   
   >   
   >    y(x) = u[0] + u[1] x + 1/2 u[2] x^2  + 1/6 u[3] x^3   
   >        + 1/24 a u[0] x^4  + (1/120 a u[1] + 1/120 b u[0]) x^5  + O(x^6),   
   >   
   > where u[i] is the ith derivative of y at x=0.   
   >   
   > --   
   > Rouben Rostamian   
      
      
   I tried this in wolfram, it cannot either. why?   
      
      
   reference math handbook   
   mathHandbook.com   
      
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