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D( p )
(8*p^7)^2 = 0
(8*p^7)^2 = 0
(8*p^7)^2 = 0
64*p^14 = 0 // : 64
p^14 = 0
p = 0
p in (-oo:0) U (0:+oo)
((4*p^4)^3)/((8*p^7)^2) = 0
1*p^-2 = 0 // : 1
p^-2 = 0
p należy do O
p belongs to the empty set
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