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D( x )
x/2 <= 0
x/2 <= 0
x/2 <= 0
1/2*x+0 <= 0 // - 0
1/2*x <= 0 // : 1/2
x <= 0/1/2
x <= 0
x in (0:+oo)
ln(x/2) = 5 // - 5
ln(x/2)-5 = 0
ln(x/2)-5 = 0 // + 5
ln(x/2) = 5
ln(x/2) = ln(e^5)
x/2 = e^5
x/2-e^5 = 0
1/2*x-e^5 = 0 // + e^5
1/2*x = e^5 // : 1/2
x = (e^5)/1/2
x = 2*e^5
x = 2*e^5
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