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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3/4-(1/x) = (1/2)*x // - (1/2)*x
3/4-((1/2)*x)-(1/x) = 0
(-1/2)*x-x^-1+3/4 = 0
3/4*x^0-1/2*x^1-1*x^-1 = 0
(3/4*x^1-1/2*x^2-1*x^0)/(x^1) = 0 // * x^2
x^1*(3/4*x^1-1/2*x^2-1*x^0) = 0
x^1
(-1/2)*x^2+(3/4)*x-1 = 0
(-1/2)*x^2+(3/4)*x-1 = 0
DELTA = (3/4)^2-(-1*4*(-1/2))
DELTA = -23/16
DELTA < 0
x in { }
x belongs to the empty set
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