Need inverse function help

  • Thread starter ATCG
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  • #1
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Could somebody please explain to me how you would calulate the inverse functions of x^3+4x+1. And if possible how you would calulate that on the TI-83 graphing calculator. Thanks
 

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  • #2
Hurkyl
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Could somebody please explain to me how you would calulate the inverse functions of x^3+4x+1.
You don't.

The exact formula for the inverse of this function requries the cubic formula, which is fairly complicated (although in this case the result is readable), and is almost certainly not what you are expected to do in class; there's probably a way to find the answer to your problem without having to explicitly compute this inverse.
 
  • #3
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It is expected. If you know how to solve this equation please tell me.
 
  • #4
Hurkyl
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I see you've found the cubic formula. :smile: Do you still need help with it?

I'm curious what the actual text of the problem is.
 

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