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x in (-oo:+oo)
(7/3)*x^(4/3) = (-4/3)*x^(1/3) // - (-4/3)*x^(1/3)
(7/3)*x^(4/3)-((-4/3)*x^(1/3)) = 0
(7/3)*x^(4/3)+(4/3)*x^(1/3) = 0
7/3*x^(4/3)+4/3*x^(1/3) = 0
t_1 = x^(1/3)
7/3*t_1^4+4/3*t_1^1 = 0
7/3*t_1^4+4/3*t_1 = 0
1/3*t_1*(7*t_1^3+4) = 0
7*t_1^3 = -4 // : 7
t_1^3 = -4/7
t_1^3 = -4/7 // ^ 1/3
t_1 = -(4/7)^(1/3)
t_1/3 = 0
1/3*t_1 = 0 // : 1/3
t_1 = 0
t_1 = -(4/7)^(1/3)
x^(1/3)+(4/7)^(1/3) = 0
1*x^(1/3) = -(4/7)^(1/3) // : 1
x^(1/3) = -(4/7)^(1/3)
( -(4/7)^(1/3) < 0 i 1/3 in (0:1) ) => x należy do O
t_1 = 0
x^(1/3)+0 = 0
x^(1/3) = 0
1*x^(1/3) = 0 // : 1
x^(1/3) = 0
x = 0
x = 0
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