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D( x )
x = 0
8*x+3 = 0
x = 0
x = 0
8*x+3 = 0
8*x+3 = 0
8*x+3 = 0 // - 3
8*x = -3 // : 8
x = -3/8
x in (-oo:-3/8) U (-3/8:0) U (0:+oo)
(16*x-5)/(8*x+3) = 2-(5/x) // - 2-(5/x)
(16*x-5)/(8*x+3)+5/x-2 = 0
(x*(16*x-5))/(x*(8*x+3))+(5*(8*x+3))/(x*(8*x+3))+(-2*x*(8*x+3))/(x*(8*x+3)) = 0
x*(16*x-5)+5*(8*x+3)-2*x*(8*x+3) = 0
16*x^2-16*x^2+35*x-6*x+15 = 0
29*x+15 = 0
(29*x+15)/(x*(8*x+3)) = 0
(29*x+15)/(x*(8*x+3)) = 0 // * x*(8*x+3)
29*x+15 = 0
29*x+15 = 0 // - 15
29*x = -15 // : 29
x = -15/29
x = -15/29
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