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D( j )
j = 0
j = 0
j = 0
j in (-oo:0) U (0:+oo)
18.2/j = 4/16 // - 4/16
18.2/j-(4/16) = 0
18.2/j-1/4 = 0
18.2*j^-1 = 1/4 // : 18.2
j^-1 = 0.01373626
-1 < 0
1/(j^1) = 0.01373626 // * j^1
1 = 0.01373626*j^1 // : 0.01373626
72.8000198 = j^1
j = 72.8000198
j = 72.8000198
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