9/x^-4

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Solution for 9/x^-4 equation: 


D( x )

x = 0

x^-4 = 0

x = 0

x = 0

x^-4 = 0

x^-4 = 0

1*x^-4 = 0 // : 1

x^-4 = 0

x naleu017Cy do O

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

9/(x^-4) = 0

9*x^4 = 0 // : 9

x^4 = 0

x = 0

x in { 0} 

x belongs to the empty set

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