ln(9x)/x

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Solution for ln(9x)/x equation: 


D( x )

9*x <= 0

x = 0

9*x <= 0

9*x <= 0

9*x+0 <= 0 // - 0

9*x <= 0 // : 9

x <= 0/9

x <= 0

x = 0

x = 0

x in (0:+oo)

ln(9*x)/x = 0

ln(9*x)/x = 0 // * x

ln(9*x) = 0

ln(9*x) = ln(e^0)

9*x = e^0

9*x-e^0 = 0

9*x-1 = 0 // + 1

9*x = 1 // : 9

x = 1/9

x = 1/9

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