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D( x )
(9/2)*x <= 0
(9/2)*x <= 0
(9/2)*x <= 0
9/2*x+0 <= 0 // - 0
9/2*x <= 0 // : 9/2
x <= 0/9/2
x <= 0
x in (0:+oo)
ln((9/2)*x) = 3/2 // - 3/2
ln((9/2)*x)-(3/2) = 0
ln((9/2)*x)-3/2 = 0
ln((9/2)*x)-3/2 = 0 // + 3/2
ln((9/2)*x) = 3/2
ln((9/2)*x) = ln(e^(3/2))
(9/2)*x = e^(3/2)
(9/2)*x-e^(3/2) = 0
9/2*x-e^(3/2) = 0 // + e^(3/2)
9/2*x = e^(3/2) // : 9/2
x = (e^(3/2))/9/2
x = 2/9*e^(3/2)
x = 2/9*e^(3/2)
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