For cma's question

f=2/9(x-2)^2.  You can check that f(2)=0 and f(f(5))=0. So f(0)=8/9.

所有跟帖： 

• I misread the question. I think KangMM has the right answer. -yma16- ♂ (0 bytes) () 07/23/2011 postreply 12:03:39

• MM has the right answer for 5 is repeated root, Mine is for real -jinjing- ♀ (0 bytes) () 07/25/2011 postreply 10:04:51

• You are too fast too be right as I did,...f(f(X) has 5 and -1 tw -jinjing- ♀ (0 bytes) () 07/23/2011 postreply 17:10:00