hi i have this problem and i don't know where exactly i must search
if you can pass any tutorials i'll be grateful thanks.
Find Counter Examples that prove the following statements are wrong :
1-f1 (n) - f2 (n) is O(g1(n) - g2(n))
2-f1 (n) / f2 (n) is O(g1(n) / g2(n))
i need tutorials explain this problem