6-5/r

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Solution for 6-5/r equation: 


D( r )

r = 0

r = 0

r = 0

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

6-(5/r) = 0

6-5*r^-1 = 0

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

r^-1 = 6/5

-1 < 0

1/(r^1) = 6/5 // * r^1

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

5/6 = r^1

r = 5/6

r = 5/6

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