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D( x )
x^2 = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
17/(x^2)-((10/7)*x) = 0
(-10/7)*x+17/(x^2) = 0
17*x^-2-10/7*x = 0
x*(17*x^-3-10/7) = 0
17*x^-3 = 10/7 // : 17
x^-3 = 10/119
-3 < 0
1/(x^3) = 10/119 // * x^3
1 = 10/119*x^3 // : 10/119
119/10 = x^3
x^3 = 119/10 // ^ 1/3
x = (119/10)^(1/3)
x = 0
x = 0
x in { 0}
x = (119/10)^(1/3)
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