(6x^3+21)/(3x)

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Solution for (6x^3+21)/(3x) equation: 


D( x )

3*x = 0

3*x = 0

3*x = 0

3*x = 0 // : 3

x = 0

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

(6*x^3+21)/(3*x) = 0

6*x^3 = -21 // : 6

x^3 = -7/2

x^3 = -7/2 // ^ 1/3

x = -(7/2)^(1/3)

x = -(7/2)^(1/3)

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