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D( x )
(2/3)*e^-6*x <= 0
(2/3)*e^-6*x <= 0
(2/3)*e^-6*x <= 0
2/3*e^-6*x+0 <= 0 // - 0
2/3*e^-6*x <= 0 // : 2/3*e^-6
x <= 0/(2/3*e^-6)
x <= 0
x in (0:+oo)
ln((2/3)*e^-6*x) = 1 // - 1
ln((2/3)*e^-6*x)-1 = 0
ln((2/3)*e^-6*x)-1 = 0 // + 1
ln((2/3)*e^-6*x) = 1
ln((2/3)*e^-6*x) = ln(e^1)
(2/3)*e^-6*x = e^1
(2/3)*e^-6*x-e^1 = 0
2/3*e^-6*x-e = 0 // + e
2/3*e^-6*x = e // : 2/3*e^-6
x = e/(2/3*e^-6)
x = 3/2*e^7
x = 3/2*e^7
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