30/r-100=0

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Solution for 30/r-100=0 equation: 


D( r )

r = 0

r = 0

r = 0

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

30/r-100 = 0

30*r^-1 = 100 // : 30

r^-1 = 10/3

-1 < 0

1/(r^1) = 10/3 // * r^1

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

3/10 = r^1

r = 3/10

r = 3/10

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