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Unformatted text preview: 2 /(2R), r(1-r 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 x-axis is -r 2 /(R(-2+(4-r 2 /R 2 )) (1/2) ). Take the limit as r goes to 0; its of the form 0/0 so use LHopitals Rule once to get 2R(4-r 2 /R 2 ) (1/2) which goes to 4R as r goes 0....
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- Spring '10