(7*x^9/y)^-3

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Solution for (7*x^9/y)^-3 equation: 


D( x )

(7*x^9)/y = 0

(7*x^9)/y = 0

(7*x^9)/y = 0

7*x^9*y^-1 = 0 // : 7*y^-1

x^9 = 0

x = 0

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

((7*x^9)/y)^-3 = 0

1/343*x^-27*y^3 = 0 // : 1/343*y^3

x^-27 = 0

x należy do O

x belongs to the empty set

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