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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
24/x-(6*x^2) = 0
24/x-6*x^2 = 0
24*x^-1-6*x^2 = 0
6*x^-1*(4-x^3) = 0
-1*x^3 = -4 // : -1
x^3 = 4
x^3 = 4 // ^ 1/3
x = 4^(1/3)
6/x = 0
6*x^-1 = 0 // : 6
x^-1 = 0
x należy do O
x = 4^(1/3)
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