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D( a )
1-(0.9964586*a) = 0
0.171566*a+1 = 0
1-(0.9964586*a) = 0
1-(0.9964586*a) = 0
1-0.9964586*a = 0
1-0.9964586*a = 0 // - 1
-0.9964586*a = -1 // : -0.9964586
a = -1/(-0.9964586)
a = 1.00355399
0.171566*a+1 = 0
0.171566*a+1 = 0
0.171566*a+1 = 0 // - 1
0.171566*a = -1 // : 0.171566
a = -1/0.171566
a = -5.82866069
a in (-oo:-5.82866069) U (-5.82866069:1.00355399) U (1.00355399:+oo)
0.9958311/(0.171566*a+1)+0.0035414/(1-(0.9964586*a)) = 0
0.9958311/(0.171566*a+1)+0.0035414/(1-0.9964586*a) = 0
(0.9958311*(1-0.9964586*a))/((0.171566*a+1)*(1-0.9964586*a))+(0.0035414*(0.171566*a+1))/((0.171566*a+1)*(1-0.9964586*a)) = 0
0.9958311*(1-0.9964586*a)+0.0035414*(0.171566*a+1) = 0
0.9993725-0.99169687991006*a = 0
(0.9993725-0.99169687991006*a)/((0.171566*a+1)*(1-0.9964586*a)) = 0
(0.9993725-0.99169687991006*a)/((0.171566*a+1)*(1-0.9964586*a)) = 0 // * (0.171566*a+1)*(1-0.9964586*a)
0.9993725-0.99169687991006*a = 0
0.9993725-0.99169687991006*a = 0 // - 0.9993725
-0.99169687991006*a = -0.9993725 // : -0.99169687991006
a = -0.9993725/(-0.99169687991006)
a = 1.00773989
a = 1.00773989
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