3x+9/x+1

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Solution for 3x+9/x+1 equation: 


D( x )

x = 0

x = 0

x = 0

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

3*x+9/x+1 = 0

3*x^1+9*x^-1+1*x^0 = 0

(3*x^2+1*x^1+9*x^0)/(x^1) = 0 // * x^2

x^1*(3*x^2+1*x^1+9*x^0) = 0

x^1

3*x^2+x+9 = 0

3*x^2+x+9 = 0

DELTA = 1^2-(3*4*9)

DELTA = -107

DELTA < 0

x in { } 

x belongs to the empty set

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