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D( p )
p = 0
p = 0
p = 0
p in (-oo:0) U (0:+oo)
1/p-((2/4)*p)-2+3 = 0
(-1/2)*p+1/p-2+3 = 0
1*p^-1-1/2*p^1+1*p^0 = 0
(1*p^1-1/2*p^2+1*p^0)/(p^1) = 0 // * p^2
p^1*(1*p^1-1/2*p^2+1*p^0) = 0
p^1
(-1/2)*p^2+p+1 = 0
(-1/2)*p^2+p+1 = 0
DELTA = 1^2-(1*4*(-1/2))
DELTA = 3
DELTA > 0
p = (3^(1/2)-1)/(2*(-1/2)) or p = (-3^(1/2)-1)/(2*(-1/2))
p = 1-3^(1/2) or p = 3^(1/2)+1
p in { 1-3^(1/2), 3^(1/2)+1}
p in { 1-3^(1/2), 3^(1/2)+1 }
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