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D( n )

n = 0

n = 0

n = 0

n in (-oo:0) U (0:+oo)

286/n = 0.268 / - 0.268

286/n-0.268 = 0

286*n^-1 = 0.268 / : 286

n^-1 = 0.00093706

-1 < 0

1/(n^1) = 0.00093706 / * n^1

1 = 0.00093706*n^1 / : 0.00093706

1 = n^1

n = 1

n = 1

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