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you need to show that there are no disconituities in the line between 0 and 1.

For instance all polynomials are continuous over the whole real line, however if you get a divide by zero in a fuction at any point then you will have an assymtote at that point, and as such a disconinutity.

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Q: How do you prove a function is continuous on a closed set between 0 and 1?
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