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D( x )
9*x^6 = 0
256/(9*x^6) < 0
9*x^6 = 0
9*x^6 = 0
9*x^6 = 0 // : 9
x^6 = 0
x = 0
256/(9*x^6) < 0
256/(9*x^6) < 0
256/9*x^-6 < 0
256/9*x^-6 < 0 // : 256/9
x^-6 < 0/256/9
x^-6 < 0
1/(x^6) < 0
x <> 0
1/(x^6) < 0 // * x^12
(x^12)/(x^6) < 0
x^6 < 0
x belongs to the empty set
x in (-oo:0) U (0:+oo)
(256/(9*x^6))^(1/4) = 0
(256/9)^(1/4)*x^(-3/2) = 0 // : (256/9)^(1/4)
x^(-3/2) = 0
x należy do O
x belongs to the empty set
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