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D( x )
ln(3) = 0
3*x <= 0
ln(3) = 0
ln(3) = 0
t_1 = ln(3)
ln(3) = 0
t_1 = 0
x należy do R
x in (-oo:+oo)
3*x <= 0
3*x <= 0
3*x+0 <= 0 // - 0
3*x <= 0 // : 3
x <= 0/3
x <= 0
x belongs to the empty set
ln(3*x)/ln(3) = 3
x belongs to the empty set
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