We have to solve for x using the equation 2/e^x =
5/(1+e^x)
2/e^x =
5/(1+e^x)
=> 2* ( 1 + e^x) = 5*
e^x
=> 2 + 2*e^x =
5*e^x
=> 2 =
3*e^x
=> (2/3) =
e^x
take the natural logarithm of both the
sides
=> x = ln
(2/3)
=> x =
-0.4054
Therefore x = ln (2/3) or
-0.4054
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