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Unformatted text preview: 2 /(2R), r(1r 2 /(4R 2 )) (1/2) . Find the equation of the line going through that point and (0,r). The point of intersection of that line and the xaxis is r 2 /(R(2+(4r 2 /R 2 )) (1/2) ). Take the limit as r goes to 0; it’s of the form 0/0 so use L’Hopital’s Rule once to get 2R(4r 2 /R 2 ) (1/2) which goes to 4R as r goes 0....
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 Spring '10
 AlbertoDelgado
 Combinatorics, Limit of a function, Euclidean geometry, Mike Fitzpatrick, Jeff Decker, Michael Lepley

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