38/r=2/5

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Solution for 38/r=2/5 equation: 


D( r )

r = 0

r = 0

r = 0

r in (-oo:0) U (0:+oo)

38/r = 2/5 // - 2/5

38/r-(2/5) = 0

38/r-2/5 = 0

38*r^-1 = 2/5 // : 38

r^-1 = 1/95

-1 < 0

1/(r^1) = 1/95 // * r^1

1 = 1/95*r^1 // : 1/95

95 = r^1

r = 95

r = 95

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