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D( x )
x = 0
-5*x^-4 = 0
6*x^-2 = 0
x = 0
x = 0
-5*x^-4 = 0
-5*x^-4 = 0
-5*x^-4 = 0 // : -5
x^-4 = 0
x naleu017Cy do O
6*x^-2 = 0
6*x^-2 = 0
6*x^-2 = 0 // : 6
x^-2 = 0
x naleu017Cy do O
x in (-oo:0) U (0:+oo)
(6*x^3)/(-5*x^-4)+(4*x^3)/(6*x^-2) = 0
2/3*x^5-6/5*x^7 = 0
2*x^5*(1/3-3/5*x^2) = 0
-3/5*x^2 = -1/3 // : -3/5
x^2 = 5/9
x^2 = 5/9 // ^ 1/2
abs(x) = (5/9)^(1/2)
x = (5/9)^(1/2) or x = -(5/9)^(1/2)
2*x^5 = 0
2*x^5 = 0 // : 2
x^5 = 0
x = 0
x in { 0}
x in { (5/9)^(1/2), -(5/9)^(1/2) }
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