(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the derivative of 1 / ln x

2. Relevant equations

N/A

3. The attempt at a solution

y = 1/lnx

First Attempt:

y' = -1/x/(lnx)^2

y' = -1 / x(lnx)^2

Second Attempt:

ln y = ln (1 / lnx)

ln y = ln 1 - ln x

ln y = -lnx

dy/dx = y(-1/x)

dy/dx = -1/xlnx

Third Attempt:

ln y = -lnx

y = -x

y' = -1

Which one is it? =/

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# Homework Help: Derivative of 1 / ln x

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