(5*x^-8/8*y^-9)^-2

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Solution for (5*x^-8/8*y^-9)^-2 equation: 


D( x )

x = 0

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

x = 0

x = 0

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

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

5/8*x^-8*y^-9 = 0 // : 5/8*y^-9

x^-8 = 0

x należy do O

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

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

64/25*x^16*y^18 = 0 // : 64/25*y^18

x^16 = 0

x = 0

x in { 0} 

x belongs to the empty set

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