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D( b )
2*b-2 = 0
b-2 = 0
b^2-(3*b)+2 = 0
2*b-2 = 0
2*b-2 = 0
2*b-2 = 0 // + 2
2*b = 2 // : 2
b = 2/2
b = 1
b-2 = 0
b-2 = 0
b-2 = 0 // + 2
b = 2
b^2-(3*b)+2 = 0
b^2-(3*b)+2 = 0
b^2-3*b+2 = 0
b^2-3*b+2 = 0
DELTA = (-3)^2-(1*2*4)
DELTA = 1
DELTA > 0
b = (1^(1/2)+3)/(1*2) or b = (3-1^(1/2))/(1*2)
b = 2 or b = 1
b in (-oo:1) U (1:2) U (2:+oo)
2/(b-2) = b/(b^2-(3*b)+2)+b/(2*b-2) // - b/(b^2-(3*b)+2)+b/(2*b-2)
2/(b-2)-(b/(b^2-(3*b)+2))-(b/(2*b-2)) = 0
2/(b-2)-(b/(b^2-3*b+2))-(b/(2*b-2)) = 0
2/(b-2)+(-1*b)/(b^2-3*b+2)+(-1*b)/(2*b-2) = 0
b^2-3*b+2 = 0
b^2-3*b+2 = 0
b^2-3*b+2 = 0
DELTA = (-3)^2-(1*2*4)
DELTA = 1
DELTA > 0
b = (1^(1/2)+3)/(1*2) or b = (3-1^(1/2))/(1*2)
b = 2 or b = 1
(b-1)*(b-2) = 0
2/(b-2)+(-1*b)/((b-1)*(b-2))+(-1*b)/(2*b-2) = 0
(2*(b-1)*(2*b-2))/((b-2)*(b-1)*(2*b-2))+(-1*b*(2*b-2))/((b-2)*(b-1)*(2*b-2))+(-1*b*(b-2)*(b-1))/((b-2)*(b-1)*(2*b-2)) = 0
2*(b-1)*(2*b-2)-1*b*(2*b-2)-1*b*(b-2)*(b-1) = 0
2*b^2-b^3+3*b^2-6*b-2*b+4 = 0
5*b^2-b^3-8*b+4 = 0
5*b^2-b^3-8*b+4 = 0
5*b^2-b^3-8*b+4 = 0
{ 1, -1, 2, -2, 4, -4 }
1
b = 1
5*b^2-b^3-8*b+4 = 0
1
b-1
4*b-b^2-4
5*b^2-b^3-8*b+4
b-1
b^3-b^2
4*b^2-8*b+4
4*b-4*b^2
4-4*b
4*b-4
0
4*b-b^2-4 = 0
DELTA = 4^2-(-4*(-1)*4)
DELTA = 0
b = -4/(-1*2)
b = 2 or b = 2
b in { 2, 2, 1}
(b-2)^2*(b-1) = 0
((b-2)^2*(b-1))/((b-2)*(b-1)*(2*b-2)) = 0
((b-2)^2*(b-1))/((b-2)*(b-1)*(2*b-2)) = 0 // * (b-2)*(b-1)*(2*b-2)
(b-2)^2*(b-1) = 0
( b-1 )
b-1 = 0 // + 1
b = 1
( b-2 )
b-2 = 0 // + 2
b = 2
b in { 1}
b in { 2}
b belongs to the empty set
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