4-9/x

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Solution for 4-9/x equation: 


D( x )

x = 0

x = 0

x = 0

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

4-(9/x) = 0

4-9*x^-1 = 0

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

x^-1 = 4/9

-1 < 0

1/(x^1) = 4/9 // * x^1

1 = 4/9*x^1 // : 4/9

9/4 = x^1

x = 9/4

x = 9/4

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