Function Example Ideas: Tips, Suggestions, and Help

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SUMMARY

This discussion centers on generating example functions, specifically focusing on the concepts of domain and range in mathematical functions. The user seeks clarification on the relationship between a function's range and its inverse, particularly in cases where the function is not onto. The conversation highlights the importance of understanding the implications of a function's mapping and the definition of the inverse function when elements of the range are not covered.

PREREQUISITES
  • Understanding of basic function notation (f: A -> B)
  • Knowledge of domain and range concepts
  • Familiarity with the definition of onto functions
  • Comprehension of inverse functions and their properties
NEXT STEPS
  • Research examples of non-onto functions in mathematics
  • Study the properties of inverse functions in detail
  • Explore the implications of domain and range in function mapping
  • Learn about function composition and its effects on domains and ranges
USEFUL FOR

Students, educators, and anyone interested in deepening their understanding of mathematical functions, particularly in the context of domain, range, and inverse functions.

iscreamath
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http://answerboard.cramster.com/other-topic-5-311900-0.aspx"

I need help getting some ideas for an example of a function.
Any help, ideas, suggestions, and/or tips are greatly appreciated.
Thanks for looking at this question!
 
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You are sort of muddling up domain and range. If f:A->B then H must be a subset of the range B, right? And if b is an element of B such that there is no a such that f(a)=b you are defining f^(-1)({b})={} (the empty set). Also correct? Then just consider any function that isn't onto. Any one. You pick.
 
thank you

thanks for the help!
 

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