Consider an+1=11+1ana_{n+1} =\frac{1}{1+\frac{1}{a_{n}}}an+1=1+an11 for n=1,2,.....,2008,2009n = 1,2, ....., 2008, 2009n=1,2,.....,2008,2009 where a1=1a_{1} = 1a1=1. Find the value of a1a2+a2a3+a3a4+...+a2008a2009a_{1}a_{2} + a_{2}a_{3} + a_{3}a_{4} + ... + a_{2008}a_{2009}a1a2+a2a3+a3a4+...+a2008a2009.
20091000\frac{2009}{1000}10002009
20092008\frac{2009}{2008}20082009
20082009\frac{2008}{2009}20092008
60002009\frac{6000}{2009}20096000
20086000\frac{2008}{6000}60002008
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