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D( x )
x^4 = 0
x = 0
x^4 = 0
x^4 = 0
1*x^4 = 0 // : 1
x^4 = 0
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
14/(x^4) = 6/x // - 6/x
14/(x^4)-(6/x) = 0
14/(x^4)-6*x^-1 = 0
14*x^-4-6*x^-1 = 0
t_1 = x^-1
14*t_1^4-6*t_1^1 = 0
14*t_1^4-6*t_1 = 0
2*t_1*(7*t_1^3-3) = 0
7*t_1^3 = 3 // : 7
t_1^3 = 3/7
t_1^3 = 3/7 // ^ 1/3
t_1 = (3/7)^(1/3)
2*t_1 = 0
2*t_1 = 0 // : 2
t_1 = 0
t_1 = (3/7)^(1/3)
x^-1-(3/7)^(1/3) = 0
1*x^-1 = (3/7)^(1/3) // : 1
x^-1 = (3/7)^(1/3)
-1 < 0
1/(x^1) = (3/7)^(1/3) // * x^1
1 = (3/7)^(1/3)*x^1 // : (3/7)^(1/3)
1/((3/7)^(1/3)) = x^1
x = 1/((3/7)^(1/3))
t_1 = 0
x^-1+0 = 0
x^-1 = 0
1*x^-1 = 0 // : 1
x^-1 = 0
x naleu017Cy do O
x = 1/((3/7)^(1/3))
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