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D( x )
x < 0
x < 0
x in <0:+oo)
100*x^(1/2)-(75*x^2) = 0
100*x^(1/2)-75*x^2 = 0
t_1 = x^(1/2)
100*t_1^1-75*t_1^4 = 0
100*t_1-75*t_1^4 = 0
25*t_1*(4-3*t_1^3) = 0
-3*t_1^3 = -4 // : -3
t_1^3 = 4/3
t_1^3 = 4/3 // ^ 1/3
t_1 = (4/3)^(1/3)
25*t_1 = 0
25*t_1 = 0 // : 25
t_1 = 0
t_1 = (4/3)^(1/3)
x^(1/2)-(4/3)^(1/3) = 0
1*x^(1/2) = (4/3)^(1/3) // : 1
x^(1/2) = (4/3)^(1/3)
x^(1/2) = (4/3)^(1/3) // ^ 2
x = (4/3)^(2/3)
t_1 = 0
x^(1/2)+0 = 0
x^(1/2) = 0
1*x^(1/2) = 0 // : 1
x^(1/2) = 0
x = 0
x in { (4/3)^(2/3), 0 }
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