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D( x )
2*x = 0
2*x = 0
2*x = 0
2*x = 0 // : 2
x = 0
x in (-oo:0) U (0:+oo)
1/12 < 1/(2*x) // - 1/(2*x)
1/12-(1/(2*x)) < 0
(-1/2)*x^-1+1/12 < 0
-1/2*x^-1 < -1/12
-1/2*x^-1 < -1/12 // * -1
1/2*x^-1 > 1/12
1/2*x^-1 > 1/12 // : 1/2
x^-1 > 1/12/1/2
x^-1 > 1/6
1/(x^1) > 1/6
x <> 0
1/(x^1) > 1/6 // * x^2
(x^2)/(x^1) > 1/6*x^2
x^1 > 1/6*x^2
x-1/6*x^2 > 0
x^1*(1-1/6*x) > 0
x < 0
-(abs(x))^1*(1/6*(abs(x))^1+1) > 0 // : -(abs(x))^1
1/6*(abs(x))^1+1 < 0
1/6*(abs(x))^1 < -1 // : 1/6
(abs(x))^1 < -1/1/6
(abs(x))^1 < -6 // ^ 1/1
abs(x) < (-6)^(1/1)
abs(x) < -6
x belongs to the empty set
x < 0
x > 0
x^1*(1-(1/6*x^1)) > 0 // : x^1
1-(1/6*x^1) > 0
1 > 1/6*x^1 // : 1/6
1/1/6 > x^1 // ^ 1/1
(1/1/6)^(1/1) > x
x in (0:6)
x > 0
x in (0:6)
x in (0:6)
(0:6)
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