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D( j )
j = 0
j = 0
j = 0
j in (-oo:0) U (0:+oo)
5/j = 6/19.8 // - 6/19.8
5/j-(6/19.8) = 0
5/j-0.3030303 = 0
5*j^-1 = 0.3030303 // : 5
j^-1 = 0.06060606
-1 < 0
1/(j^1) = 0.06060606 // * j^1
1 = 0.06060606*j^1 // : 0.06060606
16.50000017 = j^1
j = 16.50000017
j = 16.50000017
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