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D( X )
X = 0
X = 0
X = 0
X in (-oo:0) U (0:+oo)
14 = 32/X-X // - 32/X-X
X-(32/X)+14 = 0
X-32*X^-1+14 = 0
1*X^1-32*X^-1+14*X^0 = 0
(1*X^2+14*X^1-32*X^0)/(X^1) = 0 // * X^2
X^1*(1*X^2+14*X^1-32*X^0) = 0
X^1
X^2+14*X-32 = 0
X^2+14*X-32 = 0
DELTA = 14^2-(-32*1*4)
DELTA = 324
DELTA > 0
X = (324^(1/2)-14)/(1*2) or X = (-324^(1/2)-14)/(1*2)
X = 2 or X = -16
X in { -16, 2}
X in { -16, 2 }
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