SOLUTION: find the solution of the exponential equation, rounded to four decimal places {{{(10/(1+e^(-x)))=2}}}.

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Question 849801: find the solution of the exponential equation, rounded to four decimal places
%2810%2F%281%2Be%5E%28-x%29%29%29=2.
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
find the solution of the exponential equation, rounded to four decimal places
%2810%2F%281%2Be%5E%28-x%29%29%29=2
2+2e^-x=10
2e^-x=8
e^-x=4
e^x=1/4
take log of both sides:
xlne=ln(1/4)
lne=1
x=ln(1/4)=-1.3863