Question

I REALLY NEED HELP PLEASED and E are sets of real numbers defined as follows.D={z |z<1)E={z | z27)Write DU E and Dn E using interval notation.If the set is empty, write Ø.

Answer 1

`D\text{ }\cap\text{E = }\varnothing`

The set is empty because there aren't common numbers between sets D and E.

`D\cup E=\text{ (-}\infty,\text{ 1})\text{ }\cup\lbrack\lbrack\text{7, +}\infty)`

D is an open interval and E is a closed interval because we know one ofsthe endpoints.