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D( x )
2-x = 0
2-x = 0
2-x = 0
2-x = 0 // - 2
-x = -2 // * -1
x = 2
x in (-oo:2) U (2:+oo)
X/(2-x) = 1.378404875 // - 1.378404875
X/(2-x)-1.378404875 = 0
X/(2-x)+(-1.378404875*(2-x))/(2-x) = 0
X-1.378404875*(2-x) = 0
X+1.378404875*x-2.75680975 = 0
(X+1.378404875*x-2.75680975)/(2-x) = 0
(X+1.378404875*x-2.75680975)/(2-x) = 0 // * 2-x
X+1.378404875*x-2.75680975 = 0
X+1.378404875*x-2.75680975 = 0 // - X-2.75680975
1.378404875*x = -(X-2.75680975) // : 1.378404875
x = (-(X-2.75680975))/1.378404875
x = 0.72547625*(2.75680975-X)
x = 0.72547625*(2.75680975-X)
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