0.4=2/x

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Solution for 0.4=2/x equation: 


D( x )

x = 0

x = 0

x = 0

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

0.4 = 2/x // - 2/x

0.4-(2/x) = 0

0.4-2*x^-1 = 0

-2*x^-1 = -0.4 // : -2

x^-1 = 0.2

-1 < 0

1/(x^1) = 0.2 // * x^1

1 = 0.2*x^1 // : 0.2

5 = x^1

x = 5

x = 5

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