9/1-2(1/x)

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Solution for 9/1-2(1/x) equation: 


D( x )

x = 0

x = 0

x = 0

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

9/1-(2*(1/x)) = 0

9-2*x^-1 = 0

-2*x^-1 = -9 // : -2

x^-1 = 9/2

-1 < 0

1/(x^1) = 9/2 // * x^1

1 = 9/2*x^1 // : 9/2

2/9 = x^1

x = 2/9

x = 2/9

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