75/r=6/2

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Solution for 75/r=6/2 equation: 


D( r )

r = 0

r = 0

r = 0

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

75/r = 6/2 // - 6/2

75/r-(6/2) = 0

75/r-3 = 0

75*r^-1 = 3 // : 75

r^-1 = 1/25

-1 < 0

1/(r^1) = 1/25 // * r^1

1 = 1/25*r^1 // : 1/25

25 = r^1

r = 25

r = 25

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