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D( x )
x/1.5 <= 0
x/1.5 <= 0
x/1.5 <= 0
0.66666667*x+0 <= 0 // - 0
0.66666667*x <= 0 // : 0.66666667
x <= 0/0.66666667
x <= 0
x in (0:+oo)
ln(x/1.5) = 8.01 // - 8.01
ln(x/1.5)-8.01 = 0
ln(x/1.5)-8.01 = 0 // + 8.01
ln(x/1.5) = 8.01
ln(x/1.5) = ln(e^8.01)
x/1.5 = e^8.01
x/1.5-e^8.01 = 0
0.66666667*x-e^8.01 = 0 // + e^8.01
0.66666667*x = e^8.01 // : 0.66666667
x = (e^8.01)/0.66666667
x = 1.49999999*e^8.01
x = 1.49999999*e^8.01
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