**Guide :**

**Guide :**

State the domain and range of the following relation. Is the relation a function?

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What is a Function? ... And we usually see what a function does with the input: f(x) ... Also, notice that: the domain is {2,

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Also, g is a function of both x and y. ... does not equal 3 * f(x) = 3 ... These aren't in the implied domain, so they need to be stated.

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Functions Y ... Deﬁnition 12.3 Two functions f : A !B and g D are equal ... 1 frombothsidesandinvertingproducesx˘ y. Therefore f isinjective. Function f ...

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... the set of values the function takes on as output is termed the image of the function, which is sometimes also ... or equal to 0 (ignoring ... domain of a ...

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The domain of a function is the set of numbers that ... Here are the basics that you need to know about each type of function, ... so the domain is equal to all ...

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Learn what the domain and range mean, ... The domain of a function is the set of all possible input values, ... We need a function that, ...

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Can we still find the domain and range? ... (you usually need the ... Asking for the domain of a function is the same as asking

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that x is greater than or equal to 1.” For interval notation, do the ... Also describe the end behavior ... describe the function’s domain and range using one of ...

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Functions: The domain and range ... we often describe a function using the rule, y = f ... X → Y the domain of f is the set X. This also corresponds to the set of x ...

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