6/r=2/5

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Solution for 6/r=2/5 equation: 


D( r )

r = 0

r = 0

r = 0

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

6/r = 2/5 // - 2/5

6/r-(2/5) = 0

6/r-2/5 = 0

6*r^-1 = 2/5 // : 6

r^-1 = 1/15

-1 < 0

1/(r^1) = 1/15 // * r^1

1 = 1/15*r^1 // : 1/15

15 = r^1

r = 15

r = 15

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