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D( c )
c/1 <= 0
c/1 <= 0
c/1 <= 0
c <= 0
c+0 <= 0 // - 0
c <= 0
c in (0:+oo)
10.63 = 14.8*ln(c/1) // - 14.8*ln(c/1)
10.63-(14.8*ln(c/1)) = 0
10.63-14.8*ln(c) = 0
10.63-14.8*ln(c) = 0 // - 10.63
-14.8*ln(c) = -10.63 // : -14.8
ln(c) = -10.63/(-14.8)
ln(c) = 0.71824324
ln(c) = ln(e^0.71824324)
c = e^0.71824324
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