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D( x )
x <= 0
ln(1.5) = 0
x <= 0
ln(1.5) = 0
ln(1.5) = 0
t_1 = ln(1.5)
ln(1.5) = 0
t_1 = 0
x należy do R
x in (-oo:+oo)
x belongs to the empty set
ln(x)/ln(1.5) = 1/4
x belongs to the empty set
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