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D( p )
p = 0
p = 0
p = 0
p in (-oo:0) U (0:+oo)
9/4-(3/p) = 4*p+(3/4)*p // - 4*p+(3/4)*p
9/4-(4*p)-((3/4)*p)-(3/p) = 0
(-3/4)*p-4*p-3*p^-1+9/4 = 0
9/4*p^0-19/4*p^1-3*p^-1 = 0
(9/4*p^1-19/4*p^2-3*p^0)/(p^1) = 0 // * p^2
p^1*(9/4*p^1-19/4*p^2-3*p^0) = 0
p^1
(-19/4)*p^2+(9/4)*p-3 = 0
(-19/4)*p^2+(9/4)*p-3 = 0
DELTA = (9/4)^2-(-3*4*(-19/4))
DELTA = -831/16
DELTA < 0
p in { }
p belongs to the empty set
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