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D( x )
1.1*x-1.1 = 0
1.1*x-1.1 = 0
1.1*x-1.1 = 0
1.1*x-1.1 = 0 // + 1.1
1.1*x = 1.1 // : 1.1
x = 1.1/1.1
x = 1
x in (-oo:1) U (1:+oo)
1/(1.1*x-1.1) = 2.9 // - 2.9
1/(1.1*x-1.1)-2.9 = 0
1/(1.1*x-1.1)+(-2.9*(1.1*x-1.1))/(1.1*x-1.1) = 0
1-2.9*(1.1*x-1.1) = 0
4.19-3.19*x = 0
(4.19-3.19*x)/(1.1*x-1.1) = 0
(4.19-3.19*x)/(1.1*x-1.1) = 0 // * 1.1*x-1.1
4.19-3.19*x = 0
4.19-3.19*x = 0 // - 4.19
-3.19*x = -4.19 // : -3.19
x = -4.19/(-3.19)
x = 1.31347962
x = 1.31347962
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