(9x^8/y)^-2

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Solution for (9x^8/y)^-2 equation: 


D( x )

(9*x^8)/y = 0

(9*x^8)/y = 0

(9*x^8)/y = 0

9*x^8*y^-1 = 0 // : 9*y^-1

x^8 = 0

x = 0

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

((9*x^8)/y)^-2 = 0

1/81*x^-16*y^2 = 0 // : 1/81*y^2

x^-16 = 0

x naleu017Cy do O

x belongs to the empty set

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