Today I had a very important exam about many topics and as I didn't study enough, I felt like playing chess against an opponent who was playing without a King and with 17 queens in his favor (I'm more than sure I'll get a 2/10).
I had a painful headache and couldn't even do this exercise :
Show that in the bisection method, if then .
I've tried many times to solve it, but I just can't. I prefer not to show my work, but I can say I put but now that I've turned around the answer during more than 1 hour, I'm not even sure of it. I doubt about all what I know, as did Descartes one day.
I'd be happy and grateful if you could help me to solve this problem...