whats the middle symbol?
i believe union
is your answer
thanks could u help me with one more plz
If A ⊂ B, then A ∩ B = B A ∪ B = B A ∩ B = ∅
Its true bc for proper subset its just necessary atleast one element leaset so B have more elements than A so A is a proper subset of B
Second is correct
Bc when we get union operation of both we get B bc we already know that A is proper subset of B,