2=200/x^2

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Solution for 2=200/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)

2 = 200/(x^2) // - 200/(x^2)

2-(200/(x^2)) = 0

2-200*x^-2 = 0

-200*x^-2 = -2 // : -200

x^-2 = 1/100

-2 < 0

1/(x^2) = 1/100 // * x^2

1 = 1/100*x^2 // : 1/100

100 = x^2

x^2 = 100 // ^ 1/2

abs(x) = 10

x = 10 or x = -10

x in { 10, -10 }

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