
Differential Equations Ordinary and Partial Differential Equations Math Forum 
 LinkBack  Thread Tools  Display Modes 
December 6th, 2017, 06:02 PM  #1 
Newbie Joined: Dec 2017 From: Malaysia Posts: 1 Thanks: 0  Need help for this expression
$\displaystyle y''+(3x^21/x)y'=A/x$ Any method can be used to solve this equation? Thanks a lot. 
December 6th, 2017, 06:15 PM  #2 
Senior Member Joined: Feb 2016 From: Australia Posts: 1,518 Thanks: 506 Math Focus: Yet to find out.  
December 6th, 2017, 06:38 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 18,594 Thanks: 1492 
Use $\displaystyle \frac{e^{\Large x^{\Large3}}}{x}$ as an integrating factor.

December 13th, 2017, 05:37 AM  #4 
Math Team Joined: Jan 2015 From: Alabama Posts: 2,959 Thanks: 801 
Do you mean $\displaystyle 3x^2 1/x$ (what you wrote) or $\displaystyle (3x^2 1)/x$?

December 13th, 2017, 06:15 AM  #5 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,148 Thanks: 2386 Math Focus: Mainly analysis and algebra 
Reduce the order by writing $v=y'$.


Tags 
expression, ode 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Getting one expression to another  noobinmath  Trigonometry  3  April 18th, 2016 09:07 AM 
An expression x^2 + (3y + 5)x + 2(y + 3)(y + 1)  Mr Davis 97  Algebra  1  February 3rd, 2014 09:51 PM 
Expression  wulfgarpro  Algebra  1  June 15th, 2010 06:51 PM 
Rewrite the expression as an algebraic expression in x  kev085  Algebra  1  April 24th, 2009 05:06 AM 
converting quadratic expression to a different expression  woodman5k  Algebra  2  October 10th, 2007 05:53 PM 