ln(3x/7)

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Solution for ln(3x/7) equation: 


D( x )

(3*x)/7 <= 0

(3*x)/7 <= 0

(3*x)/7 <= 0

3/7*x+0 <= 0 // - 0

3/7*x <= 0 // : 3/7

x <= 0/3/7

x <= 0

x in (0:+oo)

ln((3*x)/7) = 0

ln((3*x)/7) = ln(e^0)

(3*x)/7 = e^0

(3*x)/7-e^0 = 0

3/7*x-1 = 0 // + 1

3/7*x = 1 // : 3/7

x = 1/3/7

x = 7/3

x = 7/3

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