see
https://www.jiskha.com/questions/1800159/Let-f-x-x-2-3-8-a-Show-that-this-function-is-one-to-one-algebraically-b-Find
Let f(x)= (x-2)^3+8
a. Show that this function is one-to-one algebraically.
b. Find the inverse of f(x)
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