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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1/x-((1/2)*x) = 1/16 // - 1/16
1/x-((1/2)*x)-(1/16) = 0
(-1/2)*x+1/x-1/16 = 0
1*x^-1-1/2*x^1-1/16*x^0 = 0
(1*x^0-1/2*x^2-1/16*x^1)/(x^1) = 0 // * x^2
x^1*(1*x^0-1/2*x^2-1/16*x^1) = 0
x^1
(-1/2)*x^2+(-1/16)*x+1 = 0
(-1/2)*x^2+(-1/16)*x+1 = 0
DELTA = (-1/16)^2-(1*4*(-1/2))
DELTA = 513/256
DELTA > 0
x = ((513/256)^(1/2)-(-1/16))/(2*(-1/2)) or x = (-(-1/16)-(513/256)^(1/2))/(2*(-1/2))
x = -((513/256)^(1/2)+1/16) or x = (513/256)^(1/2)-1/16
x in { -((513/256)^(1/2)+1/16), (513/256)^(1/2)-1/16}
x in { -((513/256)^(1/2)+1/16), (513/256)^(1/2)-1/16 }
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