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D( k )
k = 0
k = 0
k = 0
k in (-oo:0) U (0:+oo)
91.2 = -ln(2)/k // + -ln(2)/k
91.2-(-ln(2)/k) = 0
ln(2)*k^-1+91.2 = 0
ln(2)*k^-1 = -91.2 // : ln(2)
k^-1 = -91.2/ln(2)
-1 < 0
1/(k^1) = -91.2/ln(2) // * k^1
1 = (-91.2/ln(2))*k^1 // : -91.2/ln(2)
-0.01096491*ln(2) = k^1
k = -0.01096491*ln(2)
k = -0.01096491*ln(2)
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