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If f(x) = (x - 3)/(-x - 4), then for what value of x is $f^{-1}(x)$ undefined?

 Jul 28, 2021
 #1
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We want the value that $f(x)$ cannot be. I claim this is $-1$, can you see why?

 Jul 28, 2021
 #2
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Hi Dudeman,

 

I can see why but not without a fair amount of effort.

Do you have a short cut method?

Melody  Jul 28, 2021

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