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D( x )
144*b^12 = 0
(81*a^6)/(144*b^12) < 0
144*b^12 = 0
144*b^12 = 0
144*b^12 = 0
x należy do R
(81*a^6)/(144*b^12) < 0
(81*a^6)/(144*b^12) < 0
9/16*a^6*b^-12 < 0
x należy do R
x belongs to the empty set
((81*a^6)/(144*b^12))^(1/2) = 0
x belongs to the empty set
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