16/2=8/r

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Solution for 16/2=8/r equation: 


D( r )

r = 0

r = 0

r = 0

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

16/2 = 8/r // - 8/r

16/2-(8/r) = 0

16/2-8*r^-1 = 0

-8*r^-1 = -8 // : -8

r^-1 = 1

-1 < 0

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

1 = 1*r^1 // : 1

1 = r^1

r = 1

r = 1

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