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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x+24/x = 10 // - 10
x+24/x-10 = 0
1*x^1+24*x^-1-10*x^0 = 0
(1*x^2-10*x^1+24*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^2-10*x^1+24*x^0) = 0
x^1
x^2-10*x+24 = 0
x^2-10*x+24 = 0
DELTA = (-10)^2-(1*4*24)
DELTA = 4
DELTA > 0
x = (4^(1/2)+10)/(1*2) or x = (10-4^(1/2))/(1*2)
x = 6 or x = 4
x in { 4, 6}
x in { 4, 6 }
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