4.2: Function Notation
- Page ID
- 45164
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Functions are written as ”\(f(x)\)= an algebraic expression”. Since \(y = f(x)\), \(f(x)\) is the same thing as \(y\). This notation expresses \(x\) as the input into the function, and \(f(x)\) as the output from the function.
\(f(x)\) does NOT mean \(f ∗ x\)!!
The most common function names are \(f(x)\), \(g(x)\) or \(h(x)\), although others may be used such as \(j(x)\), \(k(x)\) or \(m(x)\).
Most of the time, a function is called \(f(x)\).
There are no examples or homework in this section.