Precalc0101to0102-page6 - (Section 1.1: Functions) 1.1.5...

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(Section 1.1: Functions) 1.1.5 PART D: EVALUATING FUNCTIONS (THE BASICS) If an input x ± Dom f () , then its output is a well-defined (i.e., single) value, denoted by fx . • We refer to x here as the argument of f . • We refer to as the function value at x , or the image of x . is read as “ f of x ” or “ f at x .” WARNING 4 : does not mean “ f times x .” A function can be modeled by an input-output machine such as: x ± f ± When we evaluate a function at an input, we determine the resulting output and express it in simplified form.
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This document was uploaded on 12/29/2011.

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