4/12=11/r

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Solution for 4/12=11/r equation: 


D( r )

r = 0

r = 0

r = 0

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

4/12 = 11/r // - 11/r

4/12-(11/r) = 0

4/12-11*r^-1 = 0

-11*r^-1 = -1/3 // : -11

r^-1 = 1/33

-1 < 0

1/(r^1) = 1/33 // * r^1

1 = 1/33*r^1 // : 1/33

33 = r^1

r = 33

r = 33

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