Axiom of choice (theorem of set)

[lina.galvism]

hello guys, i need your help with the following exercise.




I attach the photo of the book and the photo the hint that the book mentions. thanks guys for any help

 

[Steven G]

You asked for help but failed to state what help you need. Where are you stuck? What have you tried? Follow the posting guidelines by showing us what you have done so far so we can have an idea of where you are stuck.