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  3. show that a subset of r is open if an only if it c

Show that a subset of R is open if an only if it can be expressed...

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Advance Math

Show that a subset of R is open if an only if it can beexpressed as a union of open intervals

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4.3 Ratings (676 Votes)
let A be an open set in then every point in A is an interior point that is where    See Answer
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