Confused on this question: 1) The function f is defined by f(x)=(x-3)^2-17 for x is greater than or equal to k, where k is a constant. Given that f^-1 exists, state the least possible value of k. 1b) evaluate ff(5) 1c) Solve the equation f(x) = x

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter8: Introduction To Functions
Section8.8: Linear And Quadratic Functions
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Confused on this question:

1) The function f is defined by f(x)=(x-3)^2-17 for x is greater than or equal to k, where k is a constant. Given that f^-1 exists, state the least possible value of k.

1b) evaluate ff(5)

1c) Solve the equation f(x) = x

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