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Unformatted text preview: - 5x + 3 http://tutorial.math.lamar.edu/terms.aspx College Algebra The letter we use does not matter. What is important is the “ ( x ) ” part. The letter in the
parenthesis must match the variable used on the right side of the equal sign.
It is very important to note that f ( x ) is really nothing more than a really fancy way of writing y.
If you keep that in mind you may find that dealing with function notation becomes a little easier.
Also, this is NOT a multiplication of f by x! This is one of the more common mistakes people
make when the first deal with functions. This is just a notation used to denote functions.
Next we need to talk about evaluating functions. Evaluating function is really nothing more
than asking what its value is for specific values of x. Another way of looking at it is that we are
asking what the y value for a given x is.
Evaluation is really quite simple. Let’s take the function we were looking at above f ( x ) = x2 - 5x + 3 and ask what its value is for x = 4 . In terms of f...
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This note was uploaded on 06/06/2012 for the course ICT 4 taught by Professor Mrvinh during the Spring '12 term at Hanoi University of Technology.
- Spring '12