Response to the following question:
1. Suppose n is a positive integer. and let a1. a2 an be real numbers such that a12 < ... < an.
Let (-∞; a1) denote the set {x € IR : x< a}. Obtain a formula for the set {x € IR : (x-a1) (x-a2)...(x-an)<0 } Listing the notation for intervals.