(7x^-9/8y^-3)^-2

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Solution for (7x^-9/8y^-3)^-2 equation: 


D( x )

x = 0

((7*x^-9)/8)*y^-3 = 0

x = 0

x = 0

((7*x^-9)/8)*y^-3 = 0

((7*x^-9)/8)*y^-3 = 0

7/8*x^-9*y^-3 = 0 // : 7/8*y^-3

x^-9 = 0

x naleu017Cy do O

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

(((7*x^-9)/8)*y^-3)^-2 = 0

64/49*x^18*y^6 = 0 // : 64/49*y^6

x^18 = 0

x = 0

x in { 0} 

x belongs to the empty set

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