 Thread starter
 #1
for the theorem (0.2) attached i have the following questions to ask:
1) In the case where f(xo)<0 ,the author justifies the contradiction he comes to,by writing that :
"every xε [xo,xo+δ) belongs to X"
How can we prove that?
2) In the case where f(xo)>0 ,the author justifies the contradiction he comes to,by assming that:
(xoδ) is an upper bound for X.
How can we prove that?
1) In the case where f(xo)<0 ,the author justifies the contradiction he comes to,by writing that :
"every xε [xo,xo+δ) belongs to X"
How can we prove that?
2) In the case where f(xo)>0 ,the author justifies the contradiction he comes to,by assming that:
(xoδ) is an upper bound for X.
How can we prove that?
Attachments

52.7 KB Views: 18