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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2*x^2-(108/x) = 0
2*x^2-108*x^-1 = 0
2*x^2-108*x^-1 = 0
2*x^-1*(x^3-54) = 0
1*x^3 = 54 // : 1
x^3 = 54
x^3 = 54 // ^ 1/3
x = 3*2^(1/3)
2/x = 0
2*x^-1 = 0 // : 2
x^-1 = 0
x należy do O
x = 3*2^(1/3)
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