Decide whether the following are true or false.
 .
 .
 .
 is not satisfied by any .
 For all there exists a such that .
 False. Let , then , but .

True.
Hence,
This means .

True.

False. This equality is true for since

False. Take , then
Hence, in either case and so .
I think part a) is wrong since we’re assuming x<5, then 5=0 then x<=a when a<x<a then a) would be true please correct me
*if x<5 then – 5 < – x