Thread: Set Theory help..

Thank you..

This is not a homework service
slipz418, you have posted a set of three problems.
They are nice problems.
What do you expect from us?
Remember that this is not a homework service

I'll try to give you some guidance,

the definition of one-to-one is:



and onto:

.

Also to prove that something is not one to one you need to find such that and .

Hope that helps.