math: real numbers
posted by sara .
The statement below is false. Correct it by changing two symbols.
"The interval (a,b) contains its infimum and its supremum."
I'll give you a hint.
The interval (a, b) is an open interval. What you need is a closed interval.
Parentheses are used for open intervals.
What symbol is used for closed intervals?
I hope this will help.
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