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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
99/x = 24.75*x^2 // - 24.75*x^2
99/x-(24.75*x^2) = 0
99/x-24.75*x^2 = 0
99*x^-1-24.75*x^2 = 0
x^-1*(99-24.75*x^3) = 0
-24.75*x^3 = -99 // : -24.75
x^3 = 4
x^3 = 4 // ^ 1/3
x = 4^(1/3)
1/x = 0
1*x^-1 = 0 // : 1
x^-1 = 0
x należy do O
x = 4^(1/3)
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