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D( x )
a^5*((9*a^-2*b^6)/11)*b^-6 = 0
a^5*((9*a^-2*b^6)/11)*b^-6 = 0
a^5*((9*a^-2*b^6)/11)*b^-6 = 0
9/11*a^3 = 0
x należy do R
x belongs to the empty set
(a^5*((9*a^-2*b^6)/11)*b^-6)^0 = 0
x belongs to the empty set
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