
Differential Equations Ordinary and Partial Differential Equations Math Forum 
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June 4th, 2015, 01:25 AM  #1 
Newbie Joined: Jun 2015 From: kansas city Posts: 3 Thanks: 0  ODE question
I have this ODE question I posted here too. Do you have an answer? undetermined coefficients in solving ODE question  Best Academic Essays Last edited by skipjack; June 4th, 2015 at 07:53 AM. 
June 4th, 2015, 05:28 AM  #2 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,264 Thanks: 902 
No, that's not even close. Please show how you got that.

June 4th, 2015, 06:46 AM  #3 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,675 Thanks: 2654 Math Focus: Mainly analysis and algebra 
I can't even understand what your answer means. What is $\sin(6x  \sqrt{})$? It's syntactically meaningless. As Country Boy suggests, post your working so that we can see where your approach is incorrect. 
June 4th, 2015, 07:52 AM  #4 
Global Moderator Joined: Dec 2006 Posts: 20,931 Thanks: 2205 
y = C1*cos(√6x) + C2*sin(√6x)  (7x²  4x + (17/21))e^(6x)
