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Grade: 12th pass
        
Is S = (1,2) an open set or not an open set? Why?      ..........
2 months ago

Answers : (2)

Arun
22780 Points
							open interval (1,2) is an open set. Any open interval is an open set. Both R and the empty set are open
						
2 months ago
Vikas TU
9105 Points
							
Dear student 
Additional information .
On the number line, it means you have a solid ball or bubble instead of an open one. One way to determine if you have a closed set is to actually find the open set. The closed set then includes all the numbers that are not included in the open set. For example, for the open set x = 3.
2 months ago
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