Sei B := {a, b, c}
die Aufgabe ist :
Pot(B) = {ø, {a}, {b} , {c}, {a,b} , {a,c}, {b,c}, {a,b,c} }
Dann vielleicht so:
d) Pot(B) \ {B}
= {ø, {a}, {b} , {c}, {a,b} , {a,c}, {b,c}, {a,b,c} } \ {{a,b,c}}
= {ø, {a}, {b} , {c}, {a,b} , {a,c}, {b,c} }
e) Pot(B) \ B = {ø, {a}, {b} , {c}, {a,b} , {a,c}, {b,c}, {a,b,c} } \ {a,b,c}
= {ø, {a}, {b} , {c}, {a,b} , {a,c}, {b,c}, {a,b,c} }