Recent content by cpl1992

Homework Statement Let x,y,t be in the set of all real numbers (R) such that x<y and t>0. Prove that there exists a K in the set of irrational numbers (R\Q) such that x<(K/t)<y Homework Equations if x,y are in R and x<y then there exists an r in Q such that x<=r<y The Attempt at a...

I still seem to be confused as to how B would relate to the elements in the set. If B is sup(A) then this is saying it is the lowest upper bound of A. If this is the lowest upper bound then B could be either less than or greater than the set of BA itself correct?

Supremum is the lowest upper bound of the set and infimum is the highest lower bound of the set

Homework Statement Let A be a bounded nonempty subset of the set of all real numbers (R). B exists in R and B<0. Let BA= {Ba: a exists in A} Prove sup(BA)=Binf(A) Homework Equations We are able to use the ordered field axioms, Archemedian Property ect..The Attempt at a Solution I know that...