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D( a )
a = 0
a = 0
a = 0
a in (-oo:0) U (0:+oo)
8/a-(5/8) = -((6/8)*a)-4/3 // + -((6/8)*a)-4/3
(6/8)*a+8/a-(5/8)-(-4/3) = 0
(6/8)*a+8/a-5/8+4/3 = 0
3/4*a^1+8*a^-1+17/24*a^0 = 0
(3/4*a^2+17/24*a^1+8*a^0)/(a^1) = 0 // * a^2
a^1*(3/4*a^2+17/24*a^1+8*a^0) = 0
a^1
(3/4)*a^2+(17/24)*a+8 = 0
(3/4)*a^2+(17/24)*a+8 = 0
DELTA = (17/24)^2-(4*8*(3/4))
DELTA = -13535/576
DELTA < 0
a in { }
a belongs to the empty set
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