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D( A )
A/5000 <= 0
A/5000 <= 0
A/5000 <= 0
1/5000*A+0 <= 0 // - 0
1/5000*A <= 0 // : 1/5000
A <= 0/1/5000
A <= 0
A in (0:+oo)
ln(A/5000) = 2.4 // - 2.4
ln(A/5000)-2.4 = 0
ln(A/5000)-2.4 = 0 // + 2.4
ln(A/5000) = 2.4
ln(A/5000) = ln(e^2.4)
A/5000 = e^2.4
A/5000-e^2.4 = 0
1/5000*A-e^2.4 = 0 // + e^2.4
1/5000*A = e^2.4 // : 1/5000
A = (e^2.4)/1/5000
A = 5000*e^2.4
A = 5000*e^2.4
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