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D( x )
(x-5)^11 = 0
5*x+1 <= 0
(x-5)^11 = 0
(x-5)^11 = 0
x-5 = 0 // + 5
x = 5
5*x+1 <= 0
5*x+1 <= 0
5*x+1 <= 0 // - 1
5*x <= -1 // : 5
x <= -1/5
x in (-1/5:5) U (5:+oo)
(((ln(5*x+1))^1)/4)/((x-5)^11) = 0
(ln(5*x+1)/4)/((x-5)^11) = 0
(((ln(5*x+1))^1)/4)/((x-5)^11) = 0 // * (x-5)^11
((ln(5*x+1))^1)/4 = 0
ln(5*x+1)/4 = 0
1/4*ln(5*x+1) = 0 // : 1/4
ln(5*x+1) = 0
ln(5*x+1) = ln(e^0)
5*x+1 = e^0
5*x-e^0+1 = 0
5*x = 0 // : 5
x = 0
x = 0
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