1. Proof Question

Hi guys!

Any help with the above problem would be really greatly appreciated.

TheMathsDude

2. Here is an example for part c.
$f = \left\{ {\left( {a,1} \right),\left( {b,1} \right),\left( {c,2} \right),\left( {d,2} \right)} \right\},\,A = \{ a,c\} \,\& \,B = \{ b,d\}$
$f\left( A \right)\backslash f\left( B \right) = \emptyset \,\& \,f\left( {A\backslash B} \right) = \left\{ {1,2} \right\}

$

3. Thanks for the help Plato.

Any other help with the other parts would be very helpful!

Many Thanks.

4. Originally Posted by TheMathsDude
Any other help with the other parts would be very helpful!
They are just pick-a-points proofs.
Pick a point in the subset; prove it is in the super set.
Comeon, show us some of your own work.