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D( p )
p = 0
p = 0
p = 0
p in (-oo:0) U (0:+oo)
3/2 = 486/p // - 486/p
3/2-(486/p) = 0
3/2-486*p^-1 = 0
-486*p^-1 = -3/2 // : -486
p^-1 = 1/324
-1 < 0
1/(p^1) = 1/324 // * p^1
1 = 1/324*p^1 // : 1/324
324 = p^1
p = 324
p = 324
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