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D( p )
p = 0
p = 0
p = 0
p in (-oo:0) U (0:+oo)
8/p = 8.329/7.883 // - 8.329/7.883
8/p-(8.329/7.883) = 0
8/p-1.05657745 = 0
8*p^-1 = 1.05657745 // : 8
p^-1 = 0.13207218
-1 < 0
1/(p^1) = 0.13207218 // * p^1
1 = 0.13207218*p^1 // : 0.13207218
7.57161728 = p^1
p = 7.57161728
p = 7.57161728
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