How do you express intervals as inequalities such as (-4,-2)?

1 Answer
Mar 12, 2017

Answer:

#-4< x< -2# #:x in RR#

Explanation:

Let's assume we are dealing with the interval between #-4# and #-2# on the real line, exclusive of the upper and lower end points.

This means we are considering all points #x# on the real line between -4 and -2 exclusive. That is all points #x in R# where #-4< x<-2#

NB: If we were considering the interval including the upper and lower end points, this could be written: # -4 <= x <= -2# #:x in RR#