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D( x )
x^3 = 0
x = 0
x^3 = 0
x^3 = 0
1*x^3 = 0 // : 1
x^3 = 0
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
8/(x^3) = 5/x // - 5/x
8/(x^3)-(5/x) = 0
8/(x^3)-5*x^-1 = 0
8*x^-3-5*x^-1 = 0
t_1 = x^-1
8*t_1^3-5*t_1^1 = 0
8*t_1^3-5*t_1 = 0
t_1*(8*t_1^2-5) = 0
8*t_1^2 = 5 // : 8
t_1^2 = 5/8
t_1^2 = 5/8 // ^ 1/2
abs(t_1) = (5/8)^(1/2)
t_1 = (5/8)^(1/2) or t_1 = -(5/8)^(1/2)
t_1 = 0
t_1 = 0
t_1 = (5/8)^(1/2)
x^-1-(5/8)^(1/2) = 0
1*x^-1 = (5/8)^(1/2) // : 1
x^-1 = (5/8)^(1/2)
-1 < 0
1/(x^1) = (5/8)^(1/2) // * x^1
1 = (5/8)^(1/2)*x^1 // : (5/8)^(1/2)
1/((5/8)^(1/2)) = x^1
x = 1/((5/8)^(1/2))
t_1 = -(5/8)^(1/2)
x^-1+(5/8)^(1/2) = 0
1*x^-1 = -(5/8)^(1/2) // : 1
x^-1 = -(5/8)^(1/2)
-1 < 0
1/(x^1) = -(5/8)^(1/2) // * x^1
1 = -(5/8)^(1/2)*x^1 // : -(5/8)^(1/2)
1/(-(5/8)^(1/2)) = x^1
x = 1/(-(5/8)^(1/2))
t_1 = 0
x^-1+0 = 0
x^-1 = 0
1*x^-1 = 0 // : 1
x^-1 = 0
x należy do O
x in { 1/((5/8)^(1/2)), 1/(-(5/8)^(1/2)) }
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