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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(6*x^3)/5 = (17*x^3)/4-((2*x^-1)/4) // - (17*x^3)/4-((2*x^-1)/4)
(6*x^3)/5-((17*x^3)/4)+(2*x^-1)/4 = 0
(6*x^3)/5+(-17/4)*x^3+(2*x^-1)/4 = 0
1/2*x^-1-61/20*x^3 = 0
1/2*x^-1*(1-61/10*x^4) = 0
-61/10*x^4 = -1 // : -61/10
x^4 = 10/61
x^4 = 10/61 // ^ 1/4
abs(x) = (10/61)^(1/4)
x = (10/61)^(1/4) or x = -(10/61)^(1/4)
1/(2*x) = 0
1/2*x^-1 = 0 // : 1/2
x^-1 = 0
x należy do O
x in { (10/61)^(1/4), -(10/61)^(1/4) }
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