Question

If set D is a subset of set E, then which of the following is true? D ∩ E = D or D ∩ E =E or D ∩ E = Ø

Answer 1

D ∩ E = D . Because D ∩ E => x in E and x in D => x in D ( Because D is a subset of E).

Answer 2

ok but the thing is i dont know what the upsidedown u means

Answer 3

The symbol is used to donate the Intersection. The intersection of two sets A and B is the set of all those elements which belongs to both A and B. Symbolically , we write A∩B = { x :x \[\in\] A and x ∈ B }

Answer 4

The element must be included in both the set D and E in the above example.

Answer 5

ok thank you

Answer 6

Just reply as best Response and close the question.