(4/9-x)^-1

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Solution for (4/9-x)^-1 equation: 


D( x )

4/9-x = 0

4/9-x = 0

4/9-x = 0

4/9-x = 0 // - 4/9

-x = -4/9 // * -1

x = 4/9

x in (-oo:4/9) U (4/9:+oo)

(4/9-x)^-1 = 0

1/(4/9-x) = 0

x belongs to the empty set

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