8/r=3/10

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Solution for 8/r=3/10 equation: 


D( r )

r = 0

r = 0

r = 0

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

8/r = 3/10 // - 3/10

8/r-(3/10) = 0

8/r-3/10 = 0

8*r^-1 = 3/10 // : 8

r^-1 = 3/80

-1 < 0

1/(r^1) = 3/80 // * r^1

1 = 3/80*r^1 // : 3/80

80/3 = r^1

r = 80/3

r = 80/3

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