40x^3-27/x

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Solution for 40x^3-27/x equation: 


D( x )

x = 0

x = 0

x = 0

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

40*x^3-(27/x) = 0

40*x^3-27*x^-1 = 0

40*x^3-27*x^-1 = 0

x^-1*(40*x^4-27) = 0

40*x^4 = 27 // : 40

x^4 = 27/40

x^4 = 27/40 // ^ 1/4

abs(x) = (27/40)^(1/4)

x = (27/40)^(1/4) or x = -(27/40)^(1/4)

1/x = 0

1*x^-1 = 0 // : 1

x^-1 = 0

x należy do O

x in { (27/40)^(1/4), -(27/40)^(1/4) }

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