8-(320,000/x^2)=0

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Solution for 8-(320,000/x^2)=0 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)

8-(320/(x^2)) = 0

8-320*x^-2 = 0

-320*x^-2 = -8 // : -320

x^-2 = 1/40

-2 < 0

1/(x^2) = 1/40 // * x^2

1 = 1/40*x^2 // : 1/40

40 = x^2

x^2 = 40 // ^ 1/2

abs(x) = 2*10^(1/2)

x = 2*10^(1/2) or x = -(2*10^(1/2))

x in { 2*10^(1/2), -(2*10^(1/2)) }

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