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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(3/4)*x-(3/16) = 3/x // - 3/x
(3/4)*x-(3/x)-(3/16) = 0
(3/4)*x-3*x^-1-3/16 = 0
3/4*x^1-3*x^-1-3/16*x^0 = 0
(3/4*x^2-3/16*x^1-3*x^0)/(x^1) = 0 // * x^2
x^1*(3/4*x^2-3/16*x^1-3*x^0) = 0
x^1
(3/4)*x^2+(-3/16)*x-3 = 0
(3/4)*x^2+(-3/16)*x-3 = 0
DELTA = (-3/16)^2-(-3*4*(3/4))
DELTA = 2313/256
DELTA > 0
x = ((2313/256)^(1/2)-(-3/16))/(2*(3/4)) or x = (-(-3/16)-(2313/256)^(1/2))/(2*(3/4))
x = 2/3*((2313/256)^(1/2)+3/16) or x = 2/3*(3/16-(2313/256)^(1/2))
x in { 2/3*(3/16-(2313/256)^(1/2)), 2/3*((2313/256)^(1/2)+3/16)}
x in { 2/3*(3/16-(2313/256)^(1/2)), 2/3*((2313/256)^(1/2)+3/16) }
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