Question 920065
the solution set of {x | x < -3} &#8745; {x | x > 5} is { }

why:

set {x | x < -3}={ {{{-infinity}}},....,{{{-5}}},{{{-4}}},{{{-3}}}}

set {x | x > 5}={ {{{5}}},{{{6}}},{{{7}}},.....,{{{infinity}}} }

so, there is no elements in their intersection