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D( K )
K = 0
K = 0
K = 0
K in (-oo:0) U (0:+oo)
11/K = 16 // - 16
11/K-16 = 0
11*K^-1 = 16 // : 11
K^-1 = 16/11
-1 < 0
1/(K^1) = 16/11 // * K^1
1 = 16/11*K^1 // : 16/11
11/16 = K^1
K = 11/16
K = 11/16
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