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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-(3456/(s^2)) = 0
2*s-3456*s^-2 = 0
2*s^1-3456*s^-2 = 0
(2*s^3-3456*s^0)/(s^2) = 0 // * s^4
s^2*(2*s^3-3456*s^0) = 0
s^2
2*s^3-3456 = 0
{ 1, -1, 2, -2, 3, -3, 4, -4, 6, -6, 8, -8, 9, -9, 12, -12, 16, -16, 18, -18, 24, -24, 27, -27, 32, -32, 36, -36, 48, -48, 54, -54, 64, -64, 72, -72, 96, -96, 108, -108, 128, -128, 144, -144, 192, -192, 216, -216, 288, -288, 384, -384, 432, -432, 576, -576, 864, -864, 1152, -1152, 1728, -1728, 3456, -3456 }
1
s = 1
2*s^3-3456 = -3454
1
-1
s = -1
2*s^3-3456 = -3458
-1
2
s = 2
2*s^3-3456 = -3440
2
-2
s = -2
2*s^3-3456 = -3472
-2
3
s = 3
2*s^3-3456 = -3402
3
-3
s = -3
2*s^3-3456 = -3510
-3
4
s = 4
2*s^3-3456 = -3328
4
-4
s = -4
2*s^3-3456 = -3584
-4
6
s = 6
2*s^3-3456 = -3024
6
-6
s = -6
2*s^3-3456 = -3888
-6
8
s = 8
2*s^3-3456 = -2432
8
-8
s = -8
2*s^3-3456 = -4480
-8
9
s = 9
2*s^3-3456 = -1998
9
-9
s = -9
2*s^3-3456 = -4914
-9
12
s = 12
2*s^3-3456 = 0
12
s-12
2*s^2+24*s+288
2*s^3-3456
s-12
24*s^2-2*s^3
24*s^2-3456
288*s-24*s^2
288*s-3456
3456-288*s
0
2*s^2+24*s+288 = 0
DELTA = 24^2-(2*4*288)
DELTA = -1728
DELTA < 0
s in { 12}
s = 12
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