X^4-9/x-1

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Solution for X^4-9/x-1 equation: 


D( x )

x = 0

x = 0

x = 0

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

X^4-(9/x)-1 = 0

X^4-9*x^-1-1 = 0

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

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

-1 < 0

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

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

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

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

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

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