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D( n )
n = 0
n = 0
n = 0
n in (-oo:0) U (0:+oo)
9.75/24 = 5.85/n // - 5.85/n
9.75/24-(5.85/n) = 0
9.75/24-5.85*n^-1 = 0
-5.85*n^-1 = -0.40625 // : -5.85
n^-1 = 0.06944444
-1 < 0
1/(n^1) = 0.06944444 // * n^1
1 = 0.06944444*n^1 // : 0.06944444
14.40000092 = n^1
n = 14.40000092
n = 14.40000092
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