9/7x-2/x^2

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Solution for 9/7x-2/x^2 equation: 


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)

(9/7)*x-(2/(x^2)) = 0

(9/7)*x-2*x^-2 = 0

9/7*x-2*x^-2 = 0

x*(9/7-2*x^-3) = 0

-2*x^-3 = -9/7 // : -2

x^-3 = 9/14

-3 < 0

1/(x^3) = 9/14 // * x^3

1 = 9/14*x^3 // : 9/14

14/9 = x^3

x^3 = 14/9 // ^ 1/3

x = (14/9)^(1/3)

x = 0

x = 0

x in { 0} 

x = (14/9)^(1/3)

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