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D( b )
b = 0
b = 0
b = 0
b in (-oo:0) U (0:+oo)
4/b < 4 // - 4
4/b-4 < 0
4*b^-1 < 4
4*b^-1 < 4 // : 4
b^-1 < 4/4
b^-1 < 1
1/(b^1) < 1
b <> 0
1/(b^1) < 1 // * b^2
(b^2)/(b^1) < 1*b^2
b^1 < 1*b^2
b-b^2 < 0
b^1*(1-b) < 0
b < 0
-(abs(b))^1*(1*(abs(b))^1+1) < 0 // : -(abs(b))^1
1*(abs(b))^1+1 > 0
1*(abs(b))^1 > -1 // : 1
(abs(b))^1 > -1/1
(abs(b))^1 > -1 // ^ 1/1
abs(b) > (-1)^(1/1)
abs(b) > -1
b in (-oo:0)
b < 0
b > 0
b^1*(1-(1*b^1)) < 0 // : b^1
1-(1*b^1) < 0
1 < 1*b^1 // : 1
1/1 < b^1 // ^ 1/1
(1/1)^(1/1) < b
b in (1:+oo)
b > 0
b in (-oo:0) U (1:+oo)
b in (-oo:0) U (1:+oo)
(-oo:0) U (1:+oo)
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