range is the output
|| meakes result of inside positive (says the legnth of the segment)
lets try some results
if x=1 then |1+1|=2
if x=0 then |0+1|=1
if x=-1, then |-1+1|=0
if x=-2 then |-2+1|=1
if x=infinity then |infinity+1|=infinity+1
if x=-infinity then |-finfinity+1|=infinity-1
so the ragne is from 0 to infinity or
R={x>0}
