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D( x )
ln(2) = 0
x <= 0
ln(2) = 0
ln(2) = 0
t_1 = ln(2)
ln(2) = 0
t_1 = 0
x należy do R
x in (-oo:+oo)
x <= 0
x belongs to the empty set
ln(x)/ln(2) = 33
x belongs to the empty set
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