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