4/r=3/5

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Solution for 4/r=3/5 equation: 


D( r )

r = 0

r = 0

r = 0

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

4/r = 3/5 // - 3/5

4/r-(3/5) = 0

4/r-3/5 = 0

4*r^-1 = 3/5 // : 4

r^-1 = 3/20

-1 < 0

1/(r^1) = 3/20 // * r^1

1 = 3/20*r^1 // : 3/20

20/3 = r^1

r = 20/3

r = 20/3

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