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D( x )
(3*x^2)/3 = 0
(6*x^5)/6 = 0
(3*x^2)/3 = 0
(3*x^2)/3 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
(6*x^5)/6 = 0
(6*x^5)/6 = 0
1*x^5 = 0 // : 1
x^5 = 0
x = 0
x in (-oo:0) U (0:+oo)
(1*(1/((3*x^2)/3)))/((6*x^5)/6) = 0
(1/((3*x^2)/3))/((6*x^5)/6) = 0
1*x^-7 = 0 // : 1
x^-7 = 0
x naleu017Cy do O
x belongs to the empty set
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