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Old 11-25-2011, 12:37 PM
Reyemile Reyemile is offline
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What's this rule called?
This is a mathematical rule that's pretty intuitive, and easy to prove:

If f(x) is a continuous from a to b, and if f(a) > 0 and f (b) < 0, then there exists c such that f(c) = 0.

Does this rule have a name?
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