Posted by sandy on Sunday, November 25, 2012 at 6:33pm.
13 lnx = (lnx)^2
let lnx = y
13y = y^2
y^2 - 13y = 0
y(y-13) = 0
y = 0 or y = 13
then lnx = 0 , but that is undefined
or
lnx = 13
x = e^13
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