If (X,T) is a topology space. Let A CX. If A is not open in X then A is closed. اختر احدی الاجابات True False Let(X,T)

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If (X,T) is a topology space. Let A CX. If A is not open in X then A is closed. اختر احدی الاجابات True False
Let(X,T) be a topological space and Abe a subset in a space X then: int(A) = the union of all open sets that contained in A. O int(A)= the intersection of all open sets that contained in A. int(A) = the union of all open sets that containing A int(A) = the union of all closed sets that contained in A
In the usual topological space, CL(Q)=Q^.WHERE Q IS THE RATIONAL NUMBERS اختر احدي الاجابات O True False
The set of integer numbers Z is nowhere dense set. اختر احدي الدبابات True False nac
Let (R. T left) be the left rays space. If E = (4) {-1}, then Bd(E)= [-1...). اختر احدي الدجابات O True False