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D( x )
(4*x^2)/(3*x^6) = 0
3*x^6 = 0
(4*x^2)/(3*x^6) = 0
(4*x^2)/(3*x^6) = 0
4/3*x^-4 = 0 // : 4/3
x^-4 = 0
x należy do O
3*x^6 = 0
3*x^6 = 0
3*x^6 = 0 // : 3
x^6 = 0
x = 0
x in (-oo:0) U (0:+oo)
((4*x^2)/(3*x^6))^-2 = 0
9/16*x^8 = 0 // : 9/16
x^8 = 0
x = 0
x in { 0}
x belongs to the empty set
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