D and E are sets of real numbers defined below write D U E and D E as interval notation

Question

d={x|x≥1} E={x|x<8}

Answer 1

D U E is the union, or the joining of the sets D and E.

The set D is all the numbers greater than or equal to 1, or in interval notation [1, ∞).

The set E is all the numbers less than 8, or in interval notation (-∞, 8).

Can you picture these sets on a number line? The sets overlap and cover the entire line. Therefore D U E in interval notation is (-∞, ∞).