0.4=10/x

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Solution for 0.4=10/x equation: 


D( x )

x = 0

x = 0

x = 0

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

0.4 = 10/x // - 10/x

0.4-(10/x) = 0

0.4-10*x^-1 = 0

-10*x^-1 = -0.4 // : -10

x^-1 = 0.04

-1 < 0

1/(x^1) = 0.04 // * x^1

1 = 0.04*x^1 // : 0.04

25 = x^1

x = 25

x = 25

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