Precalc0108to0109-page15 - (Section 1.9: Inverses of...

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(Section 1.9: Inverses of One-to-One Functions) 1.9.5 PART C: ONE-TO-ONE FUNCTIONS and THE HORIZONTAL LINE TEST (HLT) We now discuss which functions are invertible . From Section 1.1, A relation f is a function ± Each input to f in its domain yields exactly one output in its range. ± The graph of y = fx () in the xy -plane passes the Vertical Line Test (VLT) . A function cannot allow an input in its domain to yield two or more different outputs. The following do not represent functions:
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This document was uploaded on 12/29/2011.

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