1/(2x^3)=15

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Solution for 1/(2x^3)=15 equation: 


D( x )

2*x^3 = 0

2*x^3 = 0

2*x^3 = 0

2*x^3 = 0 // : 2

x^3 = 0

x = 0

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

1/(2*x^3) = 15 // - 15

1/(2*x^3)-15 = 0

1/2*x^-3 = 15 // : 1/2

x^-3 = 30

-3 < 0

1/(x^3) = 30 // * x^3

1 = 30*x^3 // : 30

1/30 = x^3

x^3 = 1/30 // ^ 1/3

x = (1/30)^(1/3)

x = (1/30)^(1/3)

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