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D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
2/x+1 = 24/(x^2) // - 24/(x^2)
2/x-(24/(x^2))+1 = 0
2/x-24*x^-2+1 = 0
2*x^-1-24*x^-2+1 = 0
t_1 = x^-1
2*t_1^1-24*t_1^2+1 = 0
2*t_1-24*t_1^2+1 = 0
DELTA = 2^2-(-24*1*4)
DELTA = 100
DELTA > 0
t_1 = (100^(1/2)-2)/(-24*2) or t_1 = (-100^(1/2)-2)/(-24*2)
t_1 = -1/6 or t_1 = 1/4
t_1 = -1/6
x^-1+1/6 = 0
1*x^-1 = -1/6 // : 1
x^-1 = -1/6
-1 < 0
1/(x^1) = -1/6 // * x^1
1 = -1/6*x^1 // : -1/6
-6 = x^1
x = -6
t_1 = 1/4
x^-1-1/4 = 0
1*x^-1 = 1/4 // : 1
x^-1 = 1/4
-1 < 0
1/(x^1) = 1/4 // * x^1
1 = 1/4*x^1 // : 1/4
4 = x^1
x = 4
x in { -6, 4 }
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