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D( x )
6*x = 0
x = 0
6*x = 0
6*x = 0
6*x = 0 // : 6
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1/6-(3/x) > 1/(6*x) // - 1/(6*x)
1/6-(3/x)-(1/(6*x)) > 0
(-1/6)*x^-1-3*x^-1+1/6 > 0
-19/6*x^-1 > -1/6
-19/6*x^-1 > -1/6 // * -1
19/6*x^-1 < 1/6
19/6*x^-1 < 1/6 // : 19/6
x^-1 < 1/6/19/6
x^-1 < 1/19
1/(x^1) < 1/19
x <> 0
1/(x^1) < 1/19 // * x^2
(x^2)/(x^1) < 1/19*x^2
x^1 < 1/19*x^2
x-1/19*x^2 < 0
x^1*(1-1/19*x) < 0
x < 0
-(abs(x))^1*(1/19*(abs(x))^1+1) < 0 // : -(abs(x))^1
1/19*(abs(x))^1+1 > 0
1/19*(abs(x))^1 > -1 // : 1/19
(abs(x))^1 > -1/1/19
(abs(x))^1 > -19 // ^ 1/1
abs(x) > (-19)^(1/1)
abs(x) > -19
x in (-oo:0)
x < 0
x > 0
x^1*(1-(1/19*x^1)) < 0 // : x^1
1-(1/19*x^1) < 0
1 < 1/19*x^1 // : 1/19
1/1/19 < x^1 // ^ 1/1
(1/1/19)^(1/1) < x
x in (19:+oo)
x > 0
x in (-oo:0) U (19:+oo)
x in (-oo:0) U (19:+oo)
(-oo:0) U (19:+oo)
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