1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Can someone please explain how to solve this IVP?

  1. Oct 22, 2015 #1
    • Missing homework template due to originally being posted in other forum
    x' =-5x-y
    y' =4x-y

    I got
    a=0 b=0

    The answer is
    I dont understand where the +3 comes from
  2. jcsd
  3. Oct 22, 2015 #2


    User Avatar
    Science Advisor
    Gold Member

    What are the initial conditions on x and y?
  4. Oct 24, 2015 #3


    User Avatar
    Science Advisor

    [itex]e^{-3t+ 3}= (e^3)e^{-3t}[/itex]. The "+ 3" just gives a specific value to your constant "a".
  5. Oct 24, 2015 #4

    Ray Vickson

    User Avatar
    Science Advisor
    Homework Helper

    This is not an IVP, because you have not given any initial values. That is what the "IV" stands for.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Can someone please explain how to solve this IVP?