Hello,

I tried to prove the unequally of problem 2.5 on page 69:

However I was not able to find a good prove. I tried by using the same scheme like in the prove for

But I had no success.

Can anyone give me the answer or at least a hint, how to start the prove well?

Thanks a lot,

André

P.S.: Is there a good way to embedd latex to this Forum? At the moment I just use

https://www.codecogs.com for generating latex pictures.

P.P.S.: The book is very good and the course videos make a lot of fun to watch. Really: Thanks to everyone who worked on it!