5/r=4/16

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Solution for 5/r=4/16 equation: 


D( r )

r = 0

r = 0

r = 0

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

5/r = 4/16 // - 4/16

5/r-(4/16) = 0

5/r-1/4 = 0

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

r^-1 = 1/20

-1 < 0

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

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

20 = r^1

r = 20

r = 20

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