(9/k^2)^-1/2

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Solution for (9/k^2)^-1/2 equation: 


D( k )

k^2 = 0

9/(k^2) = 0

k^2 = 0

k^2 = 0

1*k^2 = 0 // : 1

k^2 = 0

k = 0

9/(k^2) = 0

9/(k^2) = 0

9*k^-2 = 0 // : 9

k^-2 = 0

k należy do O

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

((9/(k^2))^-1)/2 = 0

1/18*k^2 = 0 // : 1/18

k^2 = 0

k = 0

k in { 0} 

k belongs to the empty set

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