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D( n )
n = 0
n = 0
n = 0
n in (-oo:0) U (0:+oo)
1.1/n = 2.4/15 // - 2.4/15
1.1/n-(2.4/15) = 0
1.1/n-0.16 = 0
1.1*n^-1 = 0.16 // : 1.1
n^-1 = 0.14545455
-1 < 0
1/(n^1) = 0.14545455 // * n^1
1 = 0.14545455*n^1 // : 0.14545455
6.87499979 = n^1
n = 6.87499979
n = 6.87499979
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