http://www.mathhelpforum.com/math-he...tions-q-1-.jpg

The 2 red boxes ... i am getting some different range of the function

http://www.mathhelpforum.com/math-he...tions-q-2-.jpg

red boxes

if x < -4 + f and 0<=f<1

then shouldn't it be x<-3 ??

and how the < change to <=

green box

the case when f=0 should be separate as for f=0 the third line will become I^2 + I^2 > 25

*the curly bracket are just simple brackets and not fractional part of x