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D( x )
x^3 = 0
x = 0
x^2 = 0
x^3 = 0
x^3 = 0
1*x^3 = 0 // : 1
x^3 = 0
x = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
16/x+8/(x^2)+1/(x^3) = 0
16*x^-1+8*x^-2+x^-3 = 0
t_1 = x^-1
1*t_1^3+8*t_1^2+16*t_1^1 = 0
t_1^3+8*t_1^2+16*t_1 = 0
t_1*(t_1^2+8*t_1+16) = 0
t_1^2+8*t_1+16 = 0
DELTA = 8^2-(1*4*16)
DELTA = 0
t_1 = -8/(1*2)
t_1 = -4 or t_1 = -4
t_1 = 0
t_1 = 0
t_1 = -4
x^-1+4 = 0
1*x^-1 = -4 // : 1
x^-1 = -4
-1 < 0
1/(x^1) = -4 // * x^1
1 = -4*x^1 // : -4
-1/4 = x^1
x = -1/4
t_1 = -4
x^-1+4 = 0
1*x^-1 = -4 // : 1
x^-1 = -4
-1 < 0
1/(x^1) = -4 // * x^1
1 = -4*x^1 // : -4
-1/4 = x^1
x = -1/4
t_1 = 0
x^-1+0 = 0
x^-1 = 0
1*x^-1 = 0 // : 1
x^-1 = 0
x naleu017Cy do O
x in { -1/4, -1/4 }
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