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D( x )
5*x-24 = 0
x-4 = 0
5*x-24 = 0
5*x-24 = 0
5*x-24 = 0 // + 24
5*x = 24 // : 5
x = 24/5
x-4 = 0
x-4 = 0
x-4 = 0 // + 4
x = 4
x in (-oo:4) U (4:24/5) U (24/5:+oo)
(x-3)/(5*x-24) = 1/(x-4) // - 1/(x-4)
(x-3)/(5*x-24)-(1/(x-4)) = 0
(x-3)/(5*x-24)-(x-4)^-1 = 0
(x-3)/(5*x-24)-1/(x-4) = 0
((x-3)*(x-4))/((5*x-24)*(x-4))+(-1*(5*x-24))/((5*x-24)*(x-4)) = 0
(x-3)*(x-4)-1*(5*x-24) = 0
x^2-12*x+36 = 0
x^2-12*x+36 = 0
x^2-12*x+36 = 0
DELTA = (-12)^2-(1*4*36)
DELTA = 0
x = 12/(1*2)
x = 6 or x = 6
(x-6)^2 = 0
((x-6)^2)/((5*x-24)*(x-4)) = 0
((x-6)^2)/((5*x-24)*(x-4)) = 0 // * (5*x-24)*(x-4)
(x-6)^2 = 0
x-6 = 0 // + 6
x = 6
x in { 6, 6 }
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