thesultan5927 thesultan5927
  • 03-03-2018
  • Mathematics
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Explain why the function f(x)=x^2 is not invertible

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sqdancefan
sqdancefan sqdancefan
  • 03-03-2018
It doesn't pass the horizontal line test. (A function will be invertible if a horizontal line only crosses its graph in one place, for any location of that line.)


When you reflect the curve across the line y=x, it becomes multiple-valued, hence its inverse is not a function.
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