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D( N )
N = 0
N = 0
N = 0
N in (-oo:0) U (0:+oo)
-99.99/N = -3.03 // + 3.03
3.03-99.99/N = 0
-99.99*N^-1 = -3.03 // : -99.99
N^-1 = 0.03030303
-1 < 0
1/(N^1) = 0.03030303 // * N^1
1 = 0.03030303*N^1 // : 0.03030303
33.00000033 = N^1
N = 33.00000033
N = 33.00000033
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