2=200/w^2

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Solution for 2=200/w^2 equation: 


D( w )

w^2 = 0

w^2 = 0

w^2 = 0

1*w^2 = 0 // : 1

w^2 = 0

w = 0

w in (-oo:0) U (0:+oo)

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

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

2-200*w^-2 = 0

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

w^-2 = 1/100

-2 < 0

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

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

100 = w^2

w^2 = 100 // ^ 1/2

abs(w) = 10

w = 10 or w = -10

w in { 10, -10 }

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