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Study Guides > College Algebra CoRequisite Course

Summary: Radical Functions

Key Concepts

  • The inverse of a quadratic function is a square root function.
  • If [latex]{f}^{-1}[/latex] is the inverse of a function [latex]f[/latex], then [latex]f[/latex] is the inverse of the function [latex]{f}^{-1}[/latex].
  • While it is not possible to find an inverse of most polynomial functions, some basic polynomials are invertible.
  • To find the inverse of certain functions, we must restrict the function to a domain on which it will be one-to-one.
  • When finding the inverse of a radical function, we need a restriction on the domain of the answer.
  • Inverse and radical and functions can be used to solve application problems.


invertible function
any function that has an inverse function

Licenses & Attributions

CC licensed content, Original

CC licensed content, Shared previously

  • Precalculus. Provided by: OpenStax Authored by: Jay Abramson, et al.. Located at: https://openstax.org/books/precalculus/pages/1-introduction-to-functions. License: CC BY: Attribution. License terms: Download For Free at : http://cnx.org/contents/[email protected]..
  • College Algebra. Provided by: OpenStax Authored by: Abramson, Jay et al.. License: CC BY: Attribution. License terms: Download for free at http://cnx.org/contents/[email protected].