- #1
ZeroOne23
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Homework Statement
Find the derivative of 1 / ln x
Homework Equations
N/A
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? =/