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D( s )
s^2 = 0
s^2 = 0
s^2 = 0
1*s^2 = 0 // : 1
s^2 = 0
s = 0
s in (-oo:0) U (0:+oo)
2*s-(1458/(s^2)) = 0
2*s-1458*s^-2 = 0
2*s^1-1458*s^-2 = 0
(2*s^3-1458*s^0)/(s^2) = 0 // * s^4
s^2*(2*s^3-1458*s^0) = 0
s^2
2*s^3-1458 = 0
{ 1, -1, 2, -2, 3, -3, 6, -6, 9, -9, 18, -18, 27, -27, 54, -54, 81, -81, 162, -162, 243, -243, 486, -486, 729, -729, 1458, -1458 }
1
s = 1
2*s^3-1458 = -1456
1
-1
s = -1
2*s^3-1458 = -1460
-1
2
s = 2
2*s^3-1458 = -1442
2
-2
s = -2
2*s^3-1458 = -1474
-2
3
s = 3
2*s^3-1458 = -1404
3
-3
s = -3
2*s^3-1458 = -1512
-3
6
s = 6
2*s^3-1458 = -1026
6
-6
s = -6
2*s^3-1458 = -1890
-6
9
s = 9
2*s^3-1458 = 0
9
s-9
2*s^2+18*s+162
2*s^3-1458
s-9
18*s^2-2*s^3
18*s^2-1458
162*s-18*s^2
162*s-1458
1458-162*s
0
2*s^2+18*s+162 = 0
DELTA = 18^2-(2*4*162)
DELTA = -972
DELTA < 0
s in { 9}
s = 9
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