Let,
$a_1=a_2=1,a_{n+2}=a_{n+1}+a_n;n\geq 1$.
$\sum^{2011}_{x=1}\left \{\sum^{\infty}_{n=1}\frac {a_n}{2011^{n+1}}\right \}=?$
CMC mock test (16)(Find Sum)
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Please don't post problems (by starting a topic) in the "X: Solved" forums. Those forums are only for showcasing the problems for the convenience of the users. You can always post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
Please don't post problems (by starting a topic) in the "X: Solved" forums. Those forums are only for showcasing the problems for the convenience of the users. You can always post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
Last edited by Labib on Sun Dec 18, 2011 7:21 pm, edited 2 times in total.
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Re: CMC mock test (16)(Find Sum)
I didn't understand what $x$ was there for... That's what hte problem stated... 
Please Install $L^AT_EX$ fonts in your PC for better looking equations,
Learn how to write equations, and don't forget to read Forum Guide and Rules.
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." - Sherlock Holmes
Learn how to write equations, and don't forget to read Forum Guide and Rules.
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." - Sherlock Holmes
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bristy1588
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Re: CMC mock test (16)(Find Sum)
Done editing...
Please Install $L^AT_EX$ fonts in your PC for better looking equations,
Learn how to write equations, and don't forget to read Forum Guide and Rules.
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." - Sherlock Holmes
Learn how to write equations, and don't forget to read Forum Guide and Rules.
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." - Sherlock Holmes