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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)
(82/(x^2)-1)*((41*x)/x+1)+(41*x)/x-1 = 0
42*(82*x^-2-1)-1+41 = 0
42*(82*x^-2-1)-1+41 = 0
3444*x^-2-1-1 = 0
3444*x^-2-2 = 0
3444*x^-2-2 = 0
3444*x^-2 = 2 // : 3444
x^-2 = 1/1722
-2 < 0
1/(x^2) = 1/1722 // * x^2
1 = 1/1722*x^2 // : 1/1722
1722 = x^2
x^2 = 1722 // ^ 1/2
abs(x) = 1722^(1/2)
x = 1722^(1/2) or x = -1722^(1/2)
x in { 1722^(1/2), -1722^(1/2) }
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