Core 3 definition

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1. Core 3 definition
Some of my summer homework is to learn all the core 3 definitions for edexcell but I'm having real trouble finding the definitions for domain and range(in reference to functions and mappings).I would appreciate it if anyone has the correct definitions for them.
2. Re: Core 3 definition
(Original post by ebie1995)
Some of my summer homework is to learn all the core 3 definitions for edexcell but I'm having real trouble finding the definitions for domain and range(in reference to functions and mappings).I would appreciate it if anyone has the correct definitions for them.
i don't know that there are official definitions! but in terms of functions, domain is what you put in and the range is what you get out. (x and y respectively i think)

although someone will have to back me up here, I'm not exactly a maths genius.
3. Re: Core 3 definition
There are various ways you could define them, but at C3 level you could probably do it like this:

Let f be a function. The domain of f is the set of x values for which f(x) is defined. The range of f is the set of y values such that there exists at least one x with f(x)=y.
4. John Wood A2 Mathematics for Edexcel; will get you an A/A* hand on heart assuming you work through thoroughly.

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Last updated: July 12, 2012
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