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D( k )
3*k^-1-k^-2 = 0
k = 0
3*k^-1-k^-2 = 0
3*k^-1-k^-2 = 0
t_1 = k^-1
3*t_1^1-1*t_1^2 = 0
3*t_1-t_1^2 = 0
DELTA = 3^2-(-1*0*4)
DELTA = 9
DELTA > 0
t_1 = (9^(1/2)-3)/(-1*2) or t_1 = (-9^(1/2)-3)/(-1*2)
t_1 = 0 or t_1 = 3
t_1 = 0
k^-1+0 = 0
k^-1 = 0
1*k^-1 = 0 // : 1
k^-1 = 0
k należy do O
t_1 = 3
k^-1-3 = 0
1*k^-1 = 3 // : 1
k^-1 = 3
-1 < 0
1/(k^1) = 3 // * k^1
1 = 3*k^1 // : 3
1/3 = k^1
k = 1/3
k = 0
k = 0
k in (-oo:0) U (0:1/3) U (1/3:+oo)
(9-k^-2)/(3*k^-1-k^-2) = 0
3*k^-1-k^-2 = 0
k^-1*(3-k^-1) = 0
-1*k^-1 = -3 // : -1
k^-1 = 3
-1 < 0
1/(k^1) = 3 // * k^1
1 = 3*k^1 // : 3
1/3 = k^1
k = 1/3
k^-1*(k-1/3) = 0
(9-k^-2)/(k^-1*(k-1/3)) = 0
-1*k^-2 = -9 // : -1
k^-2 = 9
-2 < 0
1/(k^2) = 9 // * k^2
1 = 9*k^2 // : 9
1/9 = k^2
k^2 = 1/9 // ^ 1/2
abs(k) = 1/3
k = 1/3 or k = -1/3
k in { 1/3}
k = -1/3
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