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D( x )
x < 0
27*x = 0
x < 0
27*x = 0
27*x = 0
27*x = 0 // : 27
x = 0
x in (0:+oo)
2*x^2.5-(27*x)^(-1/3) = 0
2*x^2.5-1/3*x^(-1/3) = 0
x^(-1/3)*(2*x^2.83333333-1/3) = 0
2*x^2.83333333 = 1/3 // : 2
x^2.83333333 = 1/6
x^2 = (1/6)^(1/0.83333333) // ^ 1/2
abs(x) = (1/6)^0.6
x = (1/6)^0.6 or x = -(1/6)^0.6
1/(x^(1/3)) = 0
1*x^(-1/3) = 0 // : 1
x^(-1/3) = 0
x należy do O
x in { -(1/6)^0.6}
x = (1/6)^0.6
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