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!

Homework Help: Can someone verify?

  1. Jul 20, 2011 #1
    I have a first order equation I've solved to help a friend along in another poblem. But I have not solved a DE in over 10yrs - so I just want to make sure I did it correct.
    It an IVP.

    y' = (1+1/x)y y(1) = e.

    So I come up with y = CXe^x
    (C = 1 for IV)
  2. jcsd
  3. Jul 20, 2011 #2

    Ray Vickson

    User Avatar
    Science Advisor
    Homework Helper

    You can easily check it yourself: you have y(x), and can compute y'(x), then plug these into the DE to see if they work.

  4. Jul 20, 2011 #3
    Thanks Ray,
    I did this before I posted and it seemed to work. I'm just afraid if I made a mistake in one direction I made it again in the other. Like I stated, I haven't done this (any integration / derivatives or solving DE) in over a decade. I just want to know if it's correct.
  5. Jul 20, 2011 #4


    User Avatar
    Homework Helper

    It is correct.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook