Sunday, September 27, 2009

Ranges and Codomains

I just learned a useful math term: CODOMAIN. Consider the function f(x) = 3 +5x as defined over the intervals of x in [0, 10] and f(x) in [0, \infinity). The DOMAIN is [0,10]. The RANGE is [3, 50]. The CODOMAIN is [0, \infinity). This mapping is one-to-one, but not onto, so the range and codomain are not identical.

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