Wednesday, May 20, 2015

How to differentiate y= x^(e^x)

y= x^(e^x)


To differentiate,
first we will apply the natural logarithm to both
sides:


==> lny = ln
[x^(e^x)]


We know that: ln a^b = b*ln
a


==> lny = (e^x) * ln
x


Now we will differentiate both
sides:


==> (lny)' =
[e^x)*lnx]'


To differentiate e^x * ln x we will use the
product rule:


[(e^x)*lnx]' = (e^x)'*lnx +
(e^x)*(lnx)'


              = (e^x)lnx + e^x
*1/x


==> (1/y) y' = (e^x)*lnx +
e^x(1/x)


==> (y'/y) =( e^x)(
lnx/x)


==> y' = y*(e^x)*lnx /x

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