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Benja123456789

  • 3 years ago

I am confused re: the chapter "derivative of an inverse function". How can the derivative of f^-1(x) be 1/the derivative of f(x)? Just looking at an example: the derivative of e^x is e^x... but the derivative of ln(x) sure as hell isn't 1/e^x.

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  1. nickfrei
    • 3 years ago
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    the derivative of f^-1(x) is 1/the derivative of the inverse function, d{f -1(x)}/dx = 1 f '(f -1(x))

  2. nickfrei
    • 3 years ago
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    sorry i was wrong the derivative f^-1(x) is 1/the derivative of the function evaluated at the inverse. So in your case it's 1/(e^ln(x)).

  3. Stacey
    • 3 years ago
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    |dw:1352268609073:dw|

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