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k in (-oo:+oo)
0.001 = k/31.2 // - k/31.2
0.001-(k/31.2) = 0
0.001-0.03205128*k = 0
0.001-0.03205128*k = 0 // - 0.001
-0.03205128*k = -0.001 // : -0.03205128
k = -0.001/(-0.03205128)
k = 0.0312
k = 0.0312
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