1). A number of sets do not have a supremum or have infinite supremum. do the same two statements?

1). A number of sets do not have a supremum or have infinite supremum. do the same two statements?

SolutionWe often have a convention that a set with no upper bound, such as the positivereal numbers, has a supremum of +∞ , and a set with no lower bound has aninfimum of −∞. In this sense...