Here's the proof that I read for method of variation of parameters-(adsbygoogle = window.adsbygoogle || []).push({});

https://www.physicsforums.com/attachment.php?attachmentid=52267&stc=1&d=1351081780

What I couldn't understand is that how could one simply assume that

u'_{1}y_{1}+u_{2}'y_{2}=0 and

u'_{1}y'_{1}+u_{2}'y'_{2}=g(x)

I just don't understand from where you get those above two results.

I would be really happy if could clear my doubt.

Thanks a lot for physics forum and its members. You have helped me a lot :)

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Couldn't understand the proof for Method of variation of parameters

**Physics Forums | Science Articles, Homework Help, Discussion**