4/x+9

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Solution for 4/x+9 equation: 


D( x )

x = 0

x = 0

x = 0

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

4/x+9 = 0

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

x^-1 = -9/4

-1 < 0

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

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

-4/9 = x^1

x = -4/9

x = -4/9

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