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D( x )
x^22 = 0
x^22 = 0
x^22 = 0
1*x^22 = 0 // : 1
x^22 = 0
x = 0
x in (-oo:0) U (0:+oo)
((11/3)/(x^22))/5 = 0
11/15*x^-22 = 0 // : 11/15
x^-22 = 0
x należy do O
x belongs to the empty set
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