(2x^-7y^-1z^-8/10x^-9y^-2z)^-1

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Solution for (2x^-7y^-1z^-8/10x^-9y^-2z)^-1 equation: 


D( x )

x^-9*y^-2*((2*x^-7*y^-1*z^-8)/10)*z = 0

x = 0

x^-9*y^-2*((2*x^-7*y^-1*z^-8)/10)*z = 0

x^-9*y^-2*((2*x^-7*y^-1*z^-8)/10)*z = 0

1/5*x^-16*y^-3*z^-7 = 0 // : 1/5*y^-3*z^-7

x^-16 = 0

x naleu017Cy do O

x = 0

x = 0

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

(x^-9*y^-2*((2*x^-7*y^-1*z^-8)/10)*z)^-1 = 0

5*x^16*y^3*z^7 = 0 // : 5*y^3*z^7

x^16 = 0

x = 0

x in { 0} 

x belongs to the empty set

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