${f}^{-1}(-91.0457054)=$
$({f}^{-1})\prime (-91.0457054)=$
Make the best possible guess about these values, given the information
provided about this mystery function f(x) . After you submit your
answers, you will be provided with further clues about the function, which you
can use to refine your guesses. You will be scored on the basis of
the number of attempts it takes you to find the correct values.

Give me a hint .
I give up; show me the solution .
Another function

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Description: use Newton-Raphson algorithm to compute inverse value of a function and also the derivative of the inverse function This is the main site of WIMS (WWW Interactive Multipurpose Server): interactive exercises, online calculators and plotters, mathematical recreation and games

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