8ln(7/x)

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Solution for 8ln(7/x) equation: 


D( x )

x = 0

7/x <= 0

x = 0

x = 0

7/x <= 0

7/x <= 0

7*x^-1 <= 0

7*x^-1 <= 0 // : 7

x^-1 <= 0/7

x^-1 <= 0

1/(x^1) <= 0

x <> 0

1/(x^1) <= 0 // * x^2

(x^2)/(x^1) <= 0

x^1 <= 0

x <= 0

x in (-oo:0)

x in (0:+oo)

8*ln(7/x) = 0

8*ln(7/x) = 0 // : 8

ln(7/x) = 0

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

7/x = e^0

7/x-e^0 = 0

7*x^-1 = 1 // : 7

x^-1 = 1/7

-1 < 0

1/(x^1) = 1/7 // * x^1

1 = 1/7*x^1 // : 1/7

7 = x^1

x = 7

x = 7

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