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D( x )
3*x = 0
2*x = 0
3*x = 0
3*x = 0
3*x = 0 // : 3
x = 0
2*x = 0
2*x = 0
2*x = 0 // : 2
x = 0
x in (-oo:0) U (0:+oo)
11/(2*x)-(2/(3*x)) = 1/6 // - 1/6
11/(2*x)-(2/(3*x))-(1/6) = 0
11/(2*x)+(-2/3)*x^-1-1/6 = 0
29/6*x^-1 = 1/6 // : 29/6
x^-1 = 1/29
-1 < 0
1/(x^1) = 1/29 // * x^1
1 = 1/29*x^1 // : 1/29
29 = x^1
x = 29
x = 29
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