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D( p )
p = 0
p = 0
p = 0
p in (-oo:0) U (0:+oo)
1.12/3 = 12/p // - 12/p
1.12/3-(12/p) = 0
1.12/3-12*p^-1 = 0
-12*p^-1 = -0.37333333 // : -12
p^-1 = 0.03111111
-1 < 0
1/(p^1) = 0.03111111 // * p^1
1 = 0.03111111*p^1 // : 0.03111111
32.14285829 = p^1
p = 32.14285829
p = 32.14285829
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